This document provides an overview of the PHP programming language. It discusses what PHP is, how PHP code can be embedded in HTML, and the benefits of dynamic web pages over static ones. It also summarizes key PHP concepts like variables, strings, arrays, operators, and functions. The document explains how PHP can be used to handle cookies, regular expressions, and database communication with MySQL and other databases. The overall summary is that PHP is a scripting language well-suited for web development that allows embedding code in HTML pages to create dynamic content.
This document provides an overview of PHP, including:
1. PHP is an open source scripting language suited for web development that can be embedded into HTML. It was created to allow for dynamic web pages by allowing code to be inserted directly into HTML markup.
2. PHP syntax is mostly borrowed from C and includes elements from Perl, C++, and Java. Code is embedded between <?php ?> tags which tells the server to switch into PHP mode.
3. Dynamic web pages allow content and structure to be customized on demand, for example greeting a user differently based on their language preference. Variables prefixed with $ are automatically declared when assigned.
The document is an introduction to PHP programming written by Dr. Perl. It defines PHP as a widely-used scripting language suited for web development. It provides an example of a simple PHP script embedded in HTML to output "Hi, I'm a PHP script!". It then discusses how PHP is used to power many popular websites and introduces the reader to using PHP for tasks like printing dates, comments, subscriptions. It explains how to set up a local development environment using XAMPP and provides some simple PHP code examples to get started.
PHP was originally created in 1994 to track website visitors but now stands for Hypertext Preprocessor. It is a server-side scripting language that allows developers to add dynamic content to websites. PHP code resides on the server and runs when a user triggers an event like submitting a form. This allows PHP websites to be more interactive than static HTML sites. The document provides examples of basic PHP syntax like using echo to output text and comments. It also introduces variables as containers for storing and manipulating data in PHP scripts.
This document provides an overview and agenda for an "Advanced PHP" training session that will cover design patterns. The training will introduce several design patterns including Strategy, Observer, and others. It will use examples like a duck simulator, weather application, and coffee bar to demonstrate how design patterns can be applied to make code more flexible, maintainable and extensible. The document outlines the topics, examples, and goals for illustrating how design patterns align with object-oriented principles.
The document provides an overview of PHP by Tabeer Patoli. It discusses that PHP is a server-side scripting language used for web development. PHP was originally created by Rasmus Lerdorf as a tool for observing webpage traffic and stands for Hypertext Preprocessor. It has since been upgraded and is now free and open source. The document also gives brief descriptions of PHP tags, comments, variables, constants, and operators.
This document provides an introduction and overview of PHP for beginners. It teaches the basics of PHP so readers can customize PHP scripts, design their own PHP projects, and become more valuable to employers with PHP skills. The tutorial explains that PHP is a scripting language embedded in HTML pages that allows dynamically generated web pages. It covers PHP syntax, variables, functions like echo, strings, and basic operators. The goal is to teach PHP fundamentals while not rushing through the material too quickly.
This document provides an overview of PHP, including what it is, how it works, and what it can be used for. PHP is an open source scripting language suited for web development that allows embedding code into HTML. PHP code is placed between <?php ?> tags and is executed on the server to generate HTML sent to the client. PHP can be used for server-side scripting, command line scripting, and writing desktop applications. It supports many databases and operating systems and can be used for tasks like collecting form data and generating dynamic web page content.
This document discusses using PHP to build a website generator with an intuitive interface for website creation and administration. It describes having sub-pages that can contain different elements like lists of people or projects, and pages made of one or many sub-pages. The technologies used are PHP, MySQL, CSS, JavaScript, and security is added through username/password and encryption. PHP is described as a scripting language especially suited for dynamic web pages that can interact with databases like MySQL. In comparison, PHP is said to be faster than both JSP and ASP.
This document provides an overview of PHP, including:
1. PHP is an open source scripting language suited for web development that can be embedded into HTML. It was created to allow for dynamic web pages by allowing code to be inserted directly into HTML markup.
2. PHP syntax is mostly borrowed from C and includes elements from Perl, C++, and Java. Code is embedded between <?php ?> tags which tells the server to switch into PHP mode.
3. Dynamic web pages allow content and structure to be customized on demand, for example greeting a user differently based on their language preference. Variables prefixed with $ are automatically declared when assigned.
The document is an introduction to PHP programming written by Dr. Perl. It defines PHP as a widely-used scripting language suited for web development. It provides an example of a simple PHP script embedded in HTML to output "Hi, I'm a PHP script!". It then discusses how PHP is used to power many popular websites and introduces the reader to using PHP for tasks like printing dates, comments, subscriptions. It explains how to set up a local development environment using XAMPP and provides some simple PHP code examples to get started.
PHP was originally created in 1994 to track website visitors but now stands for Hypertext Preprocessor. It is a server-side scripting language that allows developers to add dynamic content to websites. PHP code resides on the server and runs when a user triggers an event like submitting a form. This allows PHP websites to be more interactive than static HTML sites. The document provides examples of basic PHP syntax like using echo to output text and comments. It also introduces variables as containers for storing and manipulating data in PHP scripts.
This document provides an overview and agenda for an "Advanced PHP" training session that will cover design patterns. The training will introduce several design patterns including Strategy, Observer, and others. It will use examples like a duck simulator, weather application, and coffee bar to demonstrate how design patterns can be applied to make code more flexible, maintainable and extensible. The document outlines the topics, examples, and goals for illustrating how design patterns align with object-oriented principles.
The document provides an overview of PHP by Tabeer Patoli. It discusses that PHP is a server-side scripting language used for web development. PHP was originally created by Rasmus Lerdorf as a tool for observing webpage traffic and stands for Hypertext Preprocessor. It has since been upgraded and is now free and open source. The document also gives brief descriptions of PHP tags, comments, variables, constants, and operators.
This document provides an introduction and overview of PHP for beginners. It teaches the basics of PHP so readers can customize PHP scripts, design their own PHP projects, and become more valuable to employers with PHP skills. The tutorial explains that PHP is a scripting language embedded in HTML pages that allows dynamically generated web pages. It covers PHP syntax, variables, functions like echo, strings, and basic operators. The goal is to teach PHP fundamentals while not rushing through the material too quickly.
This document provides an overview of PHP, including what it is, how it works, and what it can be used for. PHP is an open source scripting language suited for web development that allows embedding code into HTML. PHP code is placed between <?php ?> tags and is executed on the server to generate HTML sent to the client. PHP can be used for server-side scripting, command line scripting, and writing desktop applications. It supports many databases and operating systems and can be used for tasks like collecting form data and generating dynamic web page content.
This document discusses using PHP to build a website generator with an intuitive interface for website creation and administration. It describes having sub-pages that can contain different elements like lists of people or projects, and pages made of one or many sub-pages. The technologies used are PHP, MySQL, CSS, JavaScript, and security is added through username/password and encryption. PHP is described as a scripting language especially suited for dynamic web pages that can interact with databases like MySQL. In comparison, PHP is said to be faster than both JSP and ASP.
This document provides an introduction to PHP with 8 sections: 1) PHP stands for Hypertext Preprocessor and is a scripting language; 2) PHP can be used on Stanford servers or free web hosts; 3) A "Hello World" example is presented using print(); 4) Syntax guidelines are outlined; 5) If/else conditional statements are covered; 6) Variables are introduced; 7) Forms processing with GET and POST variables is demonstrated; 8) More advanced PHP topics are mentioned to explore further.
PHP is a scripting language used for web development that allows developers to write dynamically generated web pages quickly. PHP code must be contained within <?php ?> tags and files must have a .php extension to be interpreted correctly. Common PHP functions include echo to output strings, variables to store and output values, and operators for assignments, math, comparisons, and more. Additional PHP files can be included using the include statement.
This document provides an introduction to PHP for beginners. It explains that PHP is a free and open-source scripting language widely used for web development. It works well with technologies like HTML, CSS, JavaScript, and databases like MySQL. Some key things PHP can do include dynamically generating web page content, working with files and databases on the server, and collecting/sending form data and cookies. Reasons to use PHP include its wide compatibility across operating systems and web servers, support for many databases, cost-effectiveness, and ease of learning.
The document discusses enterprise PHP development. It begins by noting how PHP usage has changed over time from personal projects in 1998 to powering large websites, banks, and insurance companies today. It then addresses whether PHP is "enterprise ready" and discusses improved metaphors for PHP beyond toys or LEGO bricks. The remainder of the document outlines 10 steps for enterprise PHP development, including establishing requirements, designing architecture and tools, using frameworks, implementing design patterns, and emphasizing testing.
The document provides information about PHP including what it is, where it is used, why it is used, its power and capabilities, and how to install and run PHP code. PHP is introduced as a server-side scripting language designed for web development. It is used by many popular websites and content management systems. PHP code can be embedded into HTML and is commonly used as a server-side language. Basic instructions are provided on installing PHP and running a "Hello World" PHP program. An overview of PHP syntax, variables, constants, and strings is also given.
PHP is a widely-used scripting language suited for web development that can be embedded into HTML. PHP code is enclosed in <?php ?> tags and is executed by the server before the resulting HTML is sent to the browser. The document demonstrates connecting to databases and performing queries in PHP as well as using control structures, variables, and forms to handle user input. Global variables like $_POST and $_SERVER provide server and form data to scripts.
The document provides an overview of PHP and MySQL for beginners. It covers topics such as what PHP and MySQL are, how to install them, basic syntax, variables, operators, and conditional statements. The document is intended to teach readers everything they need to know to get started with PHP and build dynamic websites that integrate with MySQL databases.
This document provides an introduction to PHP and MySQL for educational purposes. It discusses PHP basics like syntax, variables, operators, control structures, and functions. It also covers server-side dynamic web programming approaches like CGI, ASP, Java Servlets and JSP. The document explains what PHP is, how it works, and what is needed to use it. It provides examples of PHP code for scalars, operators, control structures, arrays and date functions. The goal is to provide basic PHP knowledge and code examples but not teach everything about PHP.
The document discusses HTML tags and PHP. It provides an introduction to PHP including what PHP is, how PHP files work, what PHP can do, and why PHP is useful. It also covers basic PHP syntax, variables, echo and print statements, and variable scope.
PHP is a server-side scripting language commonly used for web development. It allows developers to write scripts that can output dynamic web page content, collect form data, store and retrieve data in databases, and send emails. PHP scripts can be embedded within HTML pages and run on the server. Some key features include variables, conditional statements, loops, functions, and arrays which allow for powerful programming capabilities. PHP scripts can connect to databases like MySQL to dynamically display, insert, and update data in databases.
PHP is a server-side scripting language commonly used for web development. It allows developers to write scripts that can output dynamic web page content, collect form data, store and retrieve data in databases, and send emails. PHP scripts can be embedded within HTML pages or outputted directly. Key PHP features include variables, conditional statements, loops, functions, and arrays which allow complex tasks to be broken down into simple steps. PHP scripts can connect to databases like MySQL to dynamically display, insert, and update data in databases.
This document provides an overview of PHP including its history, functionality, syntax, and installation/configuration process. PHP started in 1994 and was originally called Personal Home Page Tool. It is a widely used open source scripting language used for web development. The document outlines how to install PHP along with a web server (e.g. Apache) and database (e.g. MySQL). It also provides basic PHP code examples and discusses how to configure the software and run PHP scripts through a web browser.
PHP is a server-side scripting language designed for web development, but also used as a general-purpose programming language. Most of the websites are using PHP in their dynamic content
php complete reference with database concepts for beginners is generally useful for those who want to start the career as a php developer. given each and every information right from the scratch to understand for the beginners and students as well. I hope this will help you a lot for the beginners to start the career.
This document provides an overview of the PHP programming language. It discusses that PHP is a server-side scripting language used for building dynamic web applications. It can be used to collect form data, generate dynamic page content, create and manage files and databases on the server. The document then demonstrates basic PHP syntax and shows how to output text and variables to the browser. It also covers PHP data types like strings, integers, arrays and objects. Finally, it provides examples of common string manipulation functions in PHP.
The document provides an overview of PHP and MySQL. It defines PHP and MySQL, describes a three-tier architecture using XAMPP, and covers various PHP and MySQL concepts like variables, sessions, queries, validation, exporting/importing data, and PDF generation. Key topics covered include the basic syntax of PHP codes, MySQL functions for connection and queries, and using the FPDF library to generate PDFs with PHP.
This document discusses PHP include statements and code reuse. It provides examples of including PHP files using include and include statements. It also discusses how included files are treated as PHP code and executed.
This document provides an overview and agenda for a PHP session that covers key topics like application organization, superglobals like $_GET and $_POST, sessions, and dates and times in PHP. It explains that superglobals are available everywhere and are commonly attacked, and that $_GET is for read-only data while $_POST is for modifying data on the server. Sessions are introduced as a way to track user information across requests by assigning each user an ID and cookie, with data stored on the server. Basic functions for working with dates and times in PHP like time(), date(), mktime(), and strtotime() are also summarized.
PHP provides predefined variables like $_GET, $_POST, and $_SESSION to access important information from the server and user requests. $_GET and $_POST are used to send data from one PHP page to another via GET and POST methods in HTTP. $_SESSION is used to store temporary user data across multiple pages during a user's session by starting the session with session_start(). Data can be stored in and retrieved from $_SESSION, and sessions can be destroyed or have data removed using unset() or by setting a timeout interval.
Josh Butts will be teaching a class on the LAMP stack, including PHP variables, control structures, functions, MySQL, forms, and basic security. The class will not meet on October 20th as Josh will be speaking at Zendcon. Resources for the class include a Google group and sample code on GitHub. PHP versions 5.2 or higher can be used for the class, with XAMPP and Zend Server CE recommended for local development. The instructor emphasizes using a good code editor like Komodo IDE, Eclipse PDT, or PHPStorm. Homework will be optional to help students explore topics covered in class.
To create an independent session for each user, a login form is needed to start a session when a user enters their credentials. The login credentials will be checked, and if valid, a session will be created and stored on the server tied to that specific user. Session variables can then be used to store user information and identify them across pages. Logging out will destroy the session data and end the user's session.
This document provides an introduction to PHP with 8 sections: 1) PHP stands for Hypertext Preprocessor and is a scripting language; 2) PHP can be used on Stanford servers or free web hosts; 3) A "Hello World" example is presented using print(); 4) Syntax guidelines are outlined; 5) If/else conditional statements are covered; 6) Variables are introduced; 7) Forms processing with GET and POST variables is demonstrated; 8) More advanced PHP topics are mentioned to explore further.
PHP is a scripting language used for web development that allows developers to write dynamically generated web pages quickly. PHP code must be contained within <?php ?> tags and files must have a .php extension to be interpreted correctly. Common PHP functions include echo to output strings, variables to store and output values, and operators for assignments, math, comparisons, and more. Additional PHP files can be included using the include statement.
This document provides an introduction to PHP for beginners. It explains that PHP is a free and open-source scripting language widely used for web development. It works well with technologies like HTML, CSS, JavaScript, and databases like MySQL. Some key things PHP can do include dynamically generating web page content, working with files and databases on the server, and collecting/sending form data and cookies. Reasons to use PHP include its wide compatibility across operating systems and web servers, support for many databases, cost-effectiveness, and ease of learning.
The document discusses enterprise PHP development. It begins by noting how PHP usage has changed over time from personal projects in 1998 to powering large websites, banks, and insurance companies today. It then addresses whether PHP is "enterprise ready" and discusses improved metaphors for PHP beyond toys or LEGO bricks. The remainder of the document outlines 10 steps for enterprise PHP development, including establishing requirements, designing architecture and tools, using frameworks, implementing design patterns, and emphasizing testing.
The document provides information about PHP including what it is, where it is used, why it is used, its power and capabilities, and how to install and run PHP code. PHP is introduced as a server-side scripting language designed for web development. It is used by many popular websites and content management systems. PHP code can be embedded into HTML and is commonly used as a server-side language. Basic instructions are provided on installing PHP and running a "Hello World" PHP program. An overview of PHP syntax, variables, constants, and strings is also given.
PHP is a widely-used scripting language suited for web development that can be embedded into HTML. PHP code is enclosed in <?php ?> tags and is executed by the server before the resulting HTML is sent to the browser. The document demonstrates connecting to databases and performing queries in PHP as well as using control structures, variables, and forms to handle user input. Global variables like $_POST and $_SERVER provide server and form data to scripts.
The document provides an overview of PHP and MySQL for beginners. It covers topics such as what PHP and MySQL are, how to install them, basic syntax, variables, operators, and conditional statements. The document is intended to teach readers everything they need to know to get started with PHP and build dynamic websites that integrate with MySQL databases.
This document provides an introduction to PHP and MySQL for educational purposes. It discusses PHP basics like syntax, variables, operators, control structures, and functions. It also covers server-side dynamic web programming approaches like CGI, ASP, Java Servlets and JSP. The document explains what PHP is, how it works, and what is needed to use it. It provides examples of PHP code for scalars, operators, control structures, arrays and date functions. The goal is to provide basic PHP knowledge and code examples but not teach everything about PHP.
The document discusses HTML tags and PHP. It provides an introduction to PHP including what PHP is, how PHP files work, what PHP can do, and why PHP is useful. It also covers basic PHP syntax, variables, echo and print statements, and variable scope.
PHP is a server-side scripting language commonly used for web development. It allows developers to write scripts that can output dynamic web page content, collect form data, store and retrieve data in databases, and send emails. PHP scripts can be embedded within HTML pages and run on the server. Some key features include variables, conditional statements, loops, functions, and arrays which allow for powerful programming capabilities. PHP scripts can connect to databases like MySQL to dynamically display, insert, and update data in databases.
PHP is a server-side scripting language commonly used for web development. It allows developers to write scripts that can output dynamic web page content, collect form data, store and retrieve data in databases, and send emails. PHP scripts can be embedded within HTML pages or outputted directly. Key PHP features include variables, conditional statements, loops, functions, and arrays which allow complex tasks to be broken down into simple steps. PHP scripts can connect to databases like MySQL to dynamically display, insert, and update data in databases.
This document provides an overview of PHP including its history, functionality, syntax, and installation/configuration process. PHP started in 1994 and was originally called Personal Home Page Tool. It is a widely used open source scripting language used for web development. The document outlines how to install PHP along with a web server (e.g. Apache) and database (e.g. MySQL). It also provides basic PHP code examples and discusses how to configure the software and run PHP scripts through a web browser.
PHP is a server-side scripting language designed for web development, but also used as a general-purpose programming language. Most of the websites are using PHP in their dynamic content
php complete reference with database concepts for beginners is generally useful for those who want to start the career as a php developer. given each and every information right from the scratch to understand for the beginners and students as well. I hope this will help you a lot for the beginners to start the career.
This document provides an overview of the PHP programming language. It discusses that PHP is a server-side scripting language used for building dynamic web applications. It can be used to collect form data, generate dynamic page content, create and manage files and databases on the server. The document then demonstrates basic PHP syntax and shows how to output text and variables to the browser. It also covers PHP data types like strings, integers, arrays and objects. Finally, it provides examples of common string manipulation functions in PHP.
The document provides an overview of PHP and MySQL. It defines PHP and MySQL, describes a three-tier architecture using XAMPP, and covers various PHP and MySQL concepts like variables, sessions, queries, validation, exporting/importing data, and PDF generation. Key topics covered include the basic syntax of PHP codes, MySQL functions for connection and queries, and using the FPDF library to generate PDFs with PHP.
This document discusses PHP include statements and code reuse. It provides examples of including PHP files using include and include statements. It also discusses how included files are treated as PHP code and executed.
This document provides an overview and agenda for a PHP session that covers key topics like application organization, superglobals like $_GET and $_POST, sessions, and dates and times in PHP. It explains that superglobals are available everywhere and are commonly attacked, and that $_GET is for read-only data while $_POST is for modifying data on the server. Sessions are introduced as a way to track user information across requests by assigning each user an ID and cookie, with data stored on the server. Basic functions for working with dates and times in PHP like time(), date(), mktime(), and strtotime() are also summarized.
PHP provides predefined variables like $_GET, $_POST, and $_SESSION to access important information from the server and user requests. $_GET and $_POST are used to send data from one PHP page to another via GET and POST methods in HTTP. $_SESSION is used to store temporary user data across multiple pages during a user's session by starting the session with session_start(). Data can be stored in and retrieved from $_SESSION, and sessions can be destroyed or have data removed using unset() or by setting a timeout interval.
Josh Butts will be teaching a class on the LAMP stack, including PHP variables, control structures, functions, MySQL, forms, and basic security. The class will not meet on October 20th as Josh will be speaking at Zendcon. Resources for the class include a Google group and sample code on GitHub. PHP versions 5.2 or higher can be used for the class, with XAMPP and Zend Server CE recommended for local development. The instructor emphasizes using a good code editor like Komodo IDE, Eclipse PDT, or PHPStorm. Homework will be optional to help students explore topics covered in class.
To create an independent session for each user, a login form is needed to start a session when a user enters their credentials. The login credentials will be checked, and if valid, a session will be created and stored on the server tied to that specific user. Session variables can then be used to store user information and identify them across pages. Logging out will destroy the session data and end the user's session.
This document discusses PHP sessions. It explains that sessions allow websites to track user information across multiple pages by storing variables on the server instead of passing them individually between pages. Sessions work by assigning each user a unique ID stored in a cookie, which is used to retrieve the corresponding session file on the server containing the user's session variables. The document also covers session expiry, destroying sessions, and retrieving session data.
This document provides an introduction and overview of PHP:
1. PHP is a scripting language used for web development that allows developers to dynamically generate web pages. It is embedded within HTML and processed by the server before the page is sent to the browser.
2. The tutorial aims to teach PHP basics so readers can customize scripts, understand PHP's working model, and gain skills valuable for employment.
3. PHP syntax is similar to C, Java, and Perl. All PHP code must be contained within opening and closing PHP tags.
This document provides an introduction and overview of PHP for beginners. It teaches the basics of PHP so readers can customize PHP scripts, design their own PHP projects, and become more valuable to employers with PHP skills. The tutorial explains that PHP is a scripting language embedded in HTML pages that allows dynamically generated web pages. It covers PHP syntax, variables, functions like echo, strings, and basic operators. The goal is to teach PHP fundamentals while not rushing through the material too quickly.
This document provides an introduction and overview of PHP:
1. PHP is a scripting language used for web development that allows developers to dynamically generate web pages. It is embedded within HTML and processed by the server before the page is sent to the browser.
2. The tutorial aims to teach PHP basics so readers can customize scripts, understand PHP's working model, and gain skills valuable for employment.
3. PHP syntax is similar to C, Java, and Perl. All PHP code must be contained within opening and closing PHP tags.
This document provides an introduction and overview of PHP:
1. PHP is a scripting language used for web development that allows developers to dynamically generate web pages. It is embedded within HTML and processed by the server before the page is sent to the browser.
2. The tutorial aims to teach PHP basics so readers can customize scripts, understand PHP's working model, and gain skills valuable for employment.
3. PHP syntax is similar to C, Java, and Perl. All PHP code must be contained within opening and closing PHP tags.
This document provides an introduction and overview of PHP for beginners. It teaches the basics of PHP so readers can customize PHP scripts, design their own PHP projects, and become more valuable to employers with PHP skills. The tutorial explains that PHP is a scripting language embedded in HTML pages that allows dynamically generated web pages. It covers PHP syntax, variables, functions like echo, strings, and basic operators. The goal is to teach PHP fundamentals while not rushing through the material too quickly.
Taken directly from PHP's home, PHP.net, "PHP is an HTML-embedded scripting language. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly."
PHP is an open-source, server-side scripting language used for web development. It was created in 1994 and allows embedding code into HTML documents. PHP is a popular choice due to its performance, open-source availability, ease of use, and support for dynamic content and databases. It has a large community for learning and support.
This document provides an introduction to PHP with 8 sections: 1) PHP stands for Hypertext Preprocessor and is a scripting language; 2) PHP can be used on Stanford servers or free web hosts but functionality may be limited; 3) A "Hello World" example is presented using print() to output text; 4) Syntax guidelines are outlined including file saving, comments, and case sensitivity; 5) Conditional statements like if/else are demonstrated; 6) Variables are introduced and basic math operations shown; 7) Forms processing with GET and POST variables is explained; 8) Further PHP topics are mentioned like cookies, games, and data parsing.
This document provides an introduction to learning PHP over 6 weeks. It covers topics like getting started with a "Hello World" example, commenting code, PHP language basics like types and variables, constants, operators, loops, forms, emails, dates, includes, databases, cookies, sessions, and creating a content management system. The introduction explains what PHP is and common uses. Sections are dedicated to explaining comments, language references, and providing code examples for concepts covered.
This document provides an introduction to learning PHP over 6 weeks. It covers topics like getting started with "Hello World", commenting code, language basics like variables and constants, operators, loops, handling forms, emails, dates, includes, MySQL, cookies, sessions, and creating tables. The document contains sample code and explanations to demonstrate each concept. It is intended to teach PHP fundamentals and common tasks to readers in a structured way over 6 weeks.
This document provides an introduction to learning PHP over 6 weeks. It covers topics like getting started with a "Hello World" example, commenting code, PHP language basics like types and variables, constants, operators, loops, forms, emails, dates, includes, databases, cookies, sessions, and creating a content management system. The introduction explains what PHP is and common uses. Sections are dedicated to explaining comments, language references, and providing code examples for concepts covered.
PHP is a widely used open source scripting language that can be embedded into HTML. PHP code is executed on the server and outputs HTML that is sent to the browser. PHP is free to download and use and can be used to create dynamic web page content, connect to databases, send and receive cookies, and more. Some key things needed to use PHP include a web server with PHP support, PHP files with a .php extension, and PHP code delimited by <?php ?> tags.
The document provides an overview of PHP (Hypertext Preprocessor), which is a widely used open-source scripting language used for web development. PHP code is executed on the server and generates HTML that is sent to the browser. PHP can connect to databases, collect form data, send/receive cookies, and more. It runs on many platforms and servers and is easy to learn. The document also covers basic PHP syntax, comments, variables, variable scope, and how to use global and static variables.
The document provides a tutorial on PHP, a server-side scripting language. It discusses what PHP is used for, how to install and use it, basic syntax like variables and strings, and key programming structures like conditional statements and arrays. The tutorial is intended for beginners to learn PHP and serves as a reference for common PHP functions and concepts.
The document provides a tutorial on PHP programming. It discusses what PHP is, how to install PHP, basic PHP syntax like variables and data types, and how to use PHP with HTML. It also covers PHP programming concepts like strings, operators, conditional statements, arrays, and more. The tutorial aims to teach the fundamentals of PHP to help readers get started with learning PHP.
This document provides an introduction and overview of PHP. It begins by explaining that PHP is a server-side scripting language used for web development and interacting with databases. It then discusses prerequisites for understanding PHP and provides an introduction to basic PHP syntax and concepts like variables, data types, and embedding PHP code in HTML. The document concludes by explaining how to set up a PHP development environment and configure servers like Apache to run PHP code.
This document provides an introduction and overview of PHP. It begins by explaining that PHP is a server-side scripting language used for web development and interacting with databases. It then discusses prerequisites for understanding PHP and provides an introduction to basic PHP syntax and concepts like variables, data types, and embedding PHP code in HTML. The document concludes by explaining how to set up a PHP development environment and configure servers like Apache to run PHP code.
This document provides an introduction and overview of PHP (Hypertext Preprocessor), a popular open source scripting language used for web development. It discusses how PHP allows developers to create dynamic content that interacts with databases, its common uses like form handling and restricting user access, and its key characteristics like simplicity, efficiency and flexibility. The document then provides instructions on setting up a PHP development environment and includes examples of basic PHP syntax like comments, escaping tags and whitespace handling.
The document provides a tutorial on basic MySQL commands for creating and manipulating databases, tables, and data. It covers how to create and delete databases and tables, insert, select, update, and delete rows of data, and perform joins across multiple tables. Examples are provided for each command to demonstrate its syntax and usage. The goal is to introduce developers to fundamental MySQL operations for structuring, managing, and querying relational data.
1. PHP Tutorial
PHP Tutorial
Compiled by: Halil Özmen (parts were written by Stig Sæther Bakken //www.zend.com/zend/art/intro.php)
CONTENTS
What is PHP?......................................................................................................................................................1
Language Syntax................................................................................................................................................2
Embedding PHP Code......................................................................................................................................2
Dynamic vs. Static Web pages..........................................................................................................................2
Variables...........................................................................................................................................................2
Strings...............................................................................................................................................................3
Arrays................................................................................................................................................................3
Conditionals and Looping Constructs................................................................................................................4
Array Traverse Constructs:...............................................................................................................................4
Operators..........................................................................................................................................................4
Functions...........................................................................................................................................................5
File System Functions:.......................................................................................................................................6
Web Application Features..................................................................................................................................6
Working With Cookies.......................................................................................................................................6
Built-in Variables...............................................................................................................................................7
PHP internal variables...................................................................................................................................7
CGI / Web server provided variables.............................................................................................................7
HTTP Request Variables...............................................................................................................................7
Regular Expressions..........................................................................................................................................8
Regular Expression Functions in PHP..............................................................................................................8
Database Handling..............................................................................................................................................9
Communication with MySQL.............................................................................................................................9
MySQL Example...............................................................................................................................................9
Communication with Other Databases............................................................................................................10
What is PHP?
PHP (recursive acronym for "PHP: Hypertext Preprocessor") is a widely-used Open Source general-purpose
scripting language that is especially suited for Web development and can be embedded into HTML.
How PHP came into being
PHP started as a quick Perl hack written by Rasmus Lerdorf in late 1994. Over the next two to three years, it
evolved into what we today know as PHP/FI 2.0. PHP/FI started to get a lot of users, but things didn't start
flying until Zeev Suraski and Andi Gutmans suddenly came along with a new parser in the summer of 1997,
leading to PHP 3.0. PHP 3.0 defined the syntax and semantics used in both versions 3 and 4.
Why yet another language?
People often ask "why invent yet another language; don't we have enough of them out there"? It is simply a
matter of "the right tool for the right job". Many Web developers found that existing tools and languages were
not ideal for the specific task of embedding code in markup. Those developers collaborated to develop a
server-side scripting language which they felt would be ideal for developing dynamic Web-based sites and
applications.
PHP was created with these particular needs in mind. Moreover, PHP code was developed for embedment
within HTML. In doing so, it was hoped that benefits such as quicker response time, improved security, and
transparency to the end user would be achieved. PHP has evolved into a language, or maybe even an
environment, that has a very specific range of tasks in mind. For this, PHP is, in Stig's humble opinion, pretty
close to the ideal tool.
For More Information
The following resources will further your knowledge of PHP:
The PHP Manual: http://www.php.net/manual/en/
The PHP FAQ: http://tr2.php.net/faq
PHP Notes 1 Halil Özmen - 08/10/2009
2. PHP Tutorial
Language Syntax
Most of PHP's syntax is borrowed from C, although there are elements borrowed from Perl, C++ and Java as
well. This article assumes that you are familiar with C's syntax. However, don't panic if you're not.
Embedding PHP Code
To give you an idea of what embedding PHP would entail, consider the following three "hello world" examples,
all of which will give the exact same output:
Example 1: HTML alone
Hello, World!
Example 2: PHP code alone
<?php print "Hello, World!"; ?>
Example 3: PHP embedded within HTML
<?php print "Hello,"; ?> World!
Web servers supporting PHP will, by default, scan a file in HTML mode. HTML code will be passed over to the
browser as usual, up until the server happens upon a PHP line of code. In examples 2 and 3 above, the "<?
php" tag informs the server that PHP code is to follow. The server then switches over to PHP mode in
anticipation of a PHP command. The "?>" tag closes out the PHP mode with the server resuming its scanning
in HTML mode once more.
Embedding code in this manner is, conceptually, a more fluid approach to designing a Web page because you
are working within the output setting, namely an HTML page. Traditionally, you had to fragment the output (i.e.
the header, body, footer etc..) and then put it into the code. Now we are inserting the code directly into the
output.
"So, what's the difference?" or "Why add extra code when HTML alone would do the trick?".
Dynamic vs. Static Web pages
The "Hello, World" example we chose would certainly not require you to use PHP. That's because it is static,
meaning its display will always remain the same. But what if you wanted to greet the world in any number of
ways? Say, for example, "Bonjour, World!", or "Yo, World!" and so on.
Since HTML tags are purely descriptive they cannot function as a variable. Nor can they convey even the
simplest of uncertainty such as a "Bonjour" or a "Yo". You need a command language to handle variability in a
Web page. Based on either a conditional statement or direct user input, a command language can generate the
"static" HTML necessary to correctly display a Web page's content.
Let us reconsider example #3. This time we want to let the user decide how to greet the world:
Example 4: PHP embedded within HTML revisited!
<?php print $greeting, ", "; ?> World!
From the above example, $greeting is assigned a value, and together with the comma and the word "World!",
this value is sent to the browser.
Dynamic Web page design, however, is more than just about inserting variables. What if you wanted not only to
greet the world in French, but also to present the page using the colors of the French flag?
Both a Web page's structure as well as its content can be customized. This means dynamic Web page
programming can also entail on-demand Web page building. No static, here!
Variables
In PHP, a variable does not require formal declaration. It will automatically be declared when a value is
assigned to it. Variables are prefixed by a dollar sign: ($VariableName).
Variables do not have declared types. A variable's type does not have to be fixed, meaning it can be changed
over the variable's lifetime. The table below list's PHP's variable types:
Type Description
Integer integer number
Double floating point number
bool1
Boolean (true or false), available from PHP 4.0
Array hybrid of ordered array and associative array
object2
an object with properties and methods (not discussed in this article)
PHP Notes 2 Halil Özmen - 08/10/2009
3. PHP Tutorial
In the following example, four variables are automatically declared by assigning a value to them:
<?php
$number = 5;
$string1 = "this is a stringn";
$string2 = 'this is another "string"';
$real = 37.2;
?>
Strings
The string constants may be enclosed between double-quotes ( " ) or single-quotes ( ' ).
In a double-quote enclosed string, the variable conversion is done automatically.
$city = "Ankara";
print "I live in $city.";
$height = 182;
print "I am $height cm tall.";
String operators: Concatenation: . Concatenation to the end: .=
$str1 = $lastname . ", " . $firstname;
$str2 .= $str3;
Arrays
PHP supports two type of arrays:
• Numerically indexed arrays
• Associative arrays.
Numerically indexed arrays:
The indices in numerically indexed arrays starts from 0 by default, although this can be altered.
The elements of an array can be of various data types. Integers, doubles and strings can be used in the
same array.
There is no declaration of size. All arrays are dynamic in PHP.
Creation of arrays:
$ar1 = array (); // here an empty array is created.
$ar2 = array (7, 12, 20, 32); // an array with indices 0 to 3
$ar3 = array (12, "January", 2008, 16.40); // array with various data types
$ar4 = array(5 => "five", "six", "seven"); // an array with indices 5 to 7
Accessing array contents:
print $ar2[2]; // 20 is output
$ar3[2] = 2009; // value of the element with index 2 is changed
$ar1[0] = "Adana"; // an element is added to $ar1
$ar3[4] = "East"; // an element is added to $ar3
printf("7: %d, 1: %d, 'six': %sn", $array1[3], $array2["one"], $array3[6]);
foreach ($ar3 as $v)
{ print "$v<br />"; } // all values of the array are output
Associative Arrays
Associative arrays has two part: keys and values. The keys are indices of the array.
Both the keys and values can be of any data type in the same array.
=> operator is used to combine the key and the value of an element of an associative array.
Creation of associative arrays:
$as1 = array(24 => "Ali", "Ankara" => 844, "Pi" => 3.14159);
$as2 = array(20458444 => "Ali Ak", 20487542 => "Ayse Bal");
Accessing array contents:
print $as1["Ankara"]; // outputs: 844
$as1[24] = "Ayse"; // value of element with key=24 is changed.
$as2[20608888] = "Fatma Girik"; // a new element is added to array.
foreach ($as2 as $id => $name)
{ print "<b>$id</b>: $name<br />"; } // all keys and values are used
foreach ($as4 as $k => $v)
{ $as4[$k] = $v + 7; } // all values of array $as4 are increased by 7
PHP Notes 3 Halil Özmen - 08/10/2009
keys values
24 "Ali"
"Ankara" 844
"Pi" 3.14159
4. PHP Tutorial
Conditionals and Looping Constructs
PHP includes if and elseif conditionals, as well as while and for loops, all with syntax similar to C. The example
below introduces these four constructs:
// Conditionals
if ($a)
{
print "a is true<br />n";
}
else if ($b)
{
print "b is true<br />n";
}
else
{
print "neither a or b is true<br />n";
}
// Loops
for ($j = 0; $j < 10; $j++)
{
print "j = $j<br />n";
}
while ($d)
{
print "ok<br />n";
$d = test_something();
}
do
{
$c = test_something();
} while ($c);
Array Traverse Constructs:
foreach ($array as $value) {...} // To traverse elements (values) in an array.
{ .... }
foreach ($array as $key => $value) {...} // To traverse elements (key + value) in an associative array.
{ .... }
Operators
Assignment operators: = += -= *= /= .= (string concatenation)
Arithmetic Operators
Example Name Result
$a + $b Addition Sum of $a and $b.
$a - $b Subtraction Difference of $a and $b.
$a * $b Multiplication Product of $a and $b.
$a / $b Division Quotient of $a and $b.
$a % $b Modulus Remainder of $a divided by $b.
Incrementing/Decrementing Operators
Example Name Effect
++$a Pre-increment Increments $a by one, then returns $a.
$a++ Post-increment Returns $a, then increments $a by one.
--$a Pre-decrement Decrements $a by one, then returns $a.
$a-- Post-decrement Returns $a, then decrements $a by one.
PHP Notes 4 Halil Özmen - 08/10/2009
5. PHP Tutorial
Comparison Operators
Example Name Result
$a == $b Equal TRUE if $a is equal to $b.
$a != $b Not equal TRUE if $a is not equal to $b.
$a <> $b Not equal TRUE if $a is not equal to $b.
$a < $b Less than TRUE if $a is strictly less than $b.
$a <= $b Less than or equal to TRUE if $a is less than or equal to $b.
$a > $b Greater than TRUE if $a is strictly greater than $b.
$a >= $b Greater than or equal to TRUE if $a is greater than or equal to $b.
$a === $b Identical TRUE if $a is equal to $b, and they are of the same type. (PHP 4 only)
$a !== $b Not identical
TRUE if $a is not equal to $b, or they are not of the same type. (PHP 4
only)
Logical Operators
Example Name Result
$a && $b And TRUE if both $a and $b are TRUE.
$a and $b And TRUE if both $a and $b are TRUE.
$a || $b Or TRUE if either $a or $b is TRUE.
$a or $b Or TRUE if either $a or $b is TRUE.
! $a Not TRUE if $a is not TRUE.
$a xor $b Xor TRUE if either $a or $b is TRUE, but not both.
String operators: Concatenation: . Concatenation to the end: .=
$str1 = $lastname . ", " . $firstname;
$str2 .= $str3;
Functions
Function declaration:
function my_func ()
{
print "Hello Ankara!";
} // end function my_func
Function parameters and returning values:
function count_a ($str)
{
$n = substr_count($str, "a");;
return ($n);
} // end function count_a
Function parameters - passing parameters by reference and by value:
function salary_increase (&$value, $inc_rate)
{
$value *= (1 + $inc_rate);
} // end function salary_increase
Returning arrays:
function get_values ($a, $b)
{
$vals = array();
// ...
// statements to put values into the array $vals
// ...
return ($vals);
} // end function get_values
PHP Notes 5 Halil Özmen - 08/10/2009
Calling the function:
my_func();
Calling the function:
$x = count_a ($name);
Calling the function:
salary_increase ($salary, 0.1);
Calling the function:
$xarr = get_values ($k, $m);
// Here, $xarr becomes an array
6. PHP Tutorial
File System Functions:
Open File $fp = fopen(“filename”, “mode”); Open a file, where mode is either “r”,
“w” or “a”
Close File fclose ($fp);
Read a line from file $line = fgets($fp, 4096);
Write a string to a file fwrite ($fp, $string);
Read all the lines of a
file
$line = fgets($fp, 4096);
while(!feof($fp))
{ print "$line<br />n";
$line = fgets($fp, 4096);
}
Reads line by line while NOT end-of-
file.
Read all the lines of a
file
$lines = file ('filename');
foreach ($lines as $line) { print $line; }
Reads all the lines of the file in an
array; then print the lines.
Delete a file unlink ('filename');
See http://www.php.net/manual/en/ref.filesystem.php for more information.
Web Application Features
One of PHP's oldest features is the ability to make HTML form and cookie data available directly to the
programmer. By default, any form entry creates a global PHP variable of the same name.
In the following example, a user name is retrieved and assigned to a variable. The name is then printed by the
sub-routine "submit.php":
<FORM ACTION="submit.php" METHOD="post">
What's your name? <INPUT NAME="myname" SIZE=3>
<br /> <input type="submit" value=" SUBMIT " name="btn_submit">
</FORM>
submit.php
<?php
print "Hello, $myname!";
?>
Working With Cookies
HTTP cookies (or just cookies) are parcels of text sent by a server to a Web client (usually a browser) and then
sent back unchanged by the client each time it accesses that server.
Each cookie has a name and value. It may also have an expiration time.
Cookies are sent by web server inside the HTTP response before any html content.
Cookies are stored in the client computer.
In PHP, to create cookie, the function setcookie is used. Example:
setcookie ("ck_cnt", $count, time()+3600*24*365); // expires in a year
In PHP, the cookies can be accessed using the super global variable $_COOKIE.
The PHP statement: extract ($_COOKIE);
creates variables with the names of cookies containing their respective values.
HTTP cookies are used for authenticating, session tracking (state maintenance), and maintaining specific
information about users, such as site preferences or the contents of their electronic shopping carts.
The PHP function setcookie() adds headers to the HTTP response. Since headers must be inserted before the
body, all setcookie() calls must be performed before any body output (usually HTML) is printed.
The following example uses a cookie to store a form value until your browser is terminated.
<?php
if (isset($myname))
{
setcookie("myname", $myname);
}
print <<<_A_
PHP Notes 6 Halil Özmen - 08/10/2009
7. PHP Tutorial
<html>
....
_A_;
....
?>
The following example displays all the cookies releated with the visited site:
<?php
if (!$_COOKIE) { $_COOKIE = $HTTP_COOKIE_VARS; }
foreach ($_COOKIE as $ck => $val)
{ print "<dd>Cookie name: $ck; value: $val<br />n"; }
?>
Examples:
• Webmail: store and use username.
• Weather Site: store the selected city in a cookie, and next time the site is visited, the weather of the
stored city is automatically displayed.
Built-in Variables
PHP has a number of built-in variables that give you access to your Web server's CGI environment,
form/cookie data and PHP internals. Here are some of the most useful variables:
PHP internal variables
The $GLOBALS and $PHP_SELF variables shown in the table below are specific to PHP:
Variable
Name
Description
$GLOBALS An associative array of all global variables. This is the only variable in PHP that is available
regardless of scope. You can access it anywhere without declaring it as a global first.
$PHP_SELF This is the current script, for example /~ssb/phpinfo.php3.
$_POST An associative array of POST variables.
$_GET An associative array of GET variables.
$_COOKIE An associative array of COOKIE variables.
$_SERVER An associative array of SERVER variables.
CGI / Web server provided variables
The variables listed below are derived from CGI protocols.
Variable Name Description
$DOCUMENT_ROOT Your Web server's base directory with user-visible files.
$REQUEST_METHOD The HTTP method used to access this page, for example GET or POST.
$REQUEST_URI Full local part of the request URL, including parameters.
$SCRIPT_FILENAME File name of the top-level page being executed.
$SCRIPT_NAME Local URI part of the page being executed.
$SERVER_NAME Domain name for the server.
$SERVER_PORT TCP port number the server runs on.
HTTP Request Variables
HTTP Request Variables are derived from their corresponding HTTP headers.
$REMOTE_ADDR IP address of the client (browser) machine
$HTTP_HOST Host name in the browser's "location" field.
$HTTP_USER_AGENT User agent (browser) being used.
$HTTP_REFERER URL of the referring page.
PHP Notes 7 Halil Özmen - 08/10/2009
8. PHP Tutorial
Regular Expressions
Regular expressions, a powerful tool for manipulating text and data, are found in scripting languages, editors,
programming environments, and specialized tools.
Special characters: "/" "-" "^" "." "" "^" "$" "*" "+" "(" ")"
Equivalent Description or Meaning Examples
/abc/ search for substring "abc"
/[akt]/ search for one of "a", "k" or "t".
/[^akt]/ true if string do not have any one of "a", "k" or "t".
/[0-4]/ /[01234]/ search for one of "0", "1", "2", "3" or "4"
/.../i Case insensitive
* Zero or more /abck*pqr/
+ One or more /abck+pqr/
d [0-9] Any decimal digit [0123456789]
D Any character that is not a decimal digit
w [0-9A-Za-z_] Alphanumerics and underscore
W Any "non-word" character
s [ rtnf] Any Whitespace character
S Any character that is not a whitespace character
b At word boundary (at the beginning or end) /babc/ or /abcb/ or /babcb/
r Return (CR)
f Linefeed (LF)
n New line (CRLF)
t Tab
/^.../ Starts with /^klm/
/...$/ Ends with /ali$/ /^good$/i
/d{4}/ 4 digits /dddd/ /[A-Z]{3}d{3}/
/d{2,4}/ 2 to 4 digits /d{2} [A-Z]{1,3} d{2,4}/
(...) Grouping
Regular Expression Functions in PHP
preg_match: Perform a regular expression match
Examples:
// The "i" after the pattern delimiter indicates a case-insensitive search
if (preg_match ("/php/i", "PHP is the web scripting language of choice."))
{ print "A match was found."; }
else
{ print "A match was not found."; }
// The b in the pattern indicates a word boundary, so only the distinct
// word "web" is matched, and not a word partial like "webbing" or "cobweb"
if (preg_match ("/bwebb/i", "PHP is the web scripting language of choice."))
{ print "A match was found."; }
else
{ print "A match was not found."; }
if (preg_match ("/bwebb/i", "PHP is the website scripting language of
choice."))
{ print "A match was found."; }
else
{ print "A match was not found."; }
preg_replace: Perform a regular expression search and replace
Examples:
$string = 'April 15, 2003';
$pattern = '/(w+) (d+), (d+)/i';
$replacement = '${1}1,$3';
print preg_replace($pattern, $replacement, $string); // April1,2003
PHP Notes 8 Halil Özmen - 08/10/2009
9. PHP Tutorial
Database Handling
Communication with MySQL
PHP and MySQL are often referred to as the "dynamic duo" of dynamic Web scripting. PHP and MySQL work
very well together, in addition to the speed and features of each individual tool.
The steps in using MySQL databases in PHP are as follows:
1. Connect to MySQL Server and select database (usually placed in main of the PHP scripts):
$dblink = mysql_connect("localhost", "db_user", "my_password")
or die("Could not connect");
mysql_select_db("my_db") or die("Can not select database");
2. Prepare and submit a query:
$query = "select * from person where p_city = '$city'
order by p_lname";
$qno = mysql_query($query)
or die("Query error: <b>$query</b><hr />" . mysql_error());
3. Get number of records selected / affected:
$n = mysql_num_rows ($qno); // Get number of records affected.
4. Fetch data from database server:
while ($record = mysql_fetch_assoc($qno))
{
extract($record); // Create variables by table column names
........ // Use these created variables
}
5. Free the query resources:
mysql_free_result ($qno); // Free query result set.
6. Close connection to database server:
mysql_close($dblink); // Close connection.
MySQL Example
The following is a simple example of how to dump the contents of a MySQL table using PHP. The example
assumes you have a MySQL user called "db_user" who can connect with password "my_password" from
localhost. In the example below, PHP implements the following procedure:
<?php
// Connect and select database:
$dblink = mysql_connect("localhost", "db_user", "my_password")
or die("Could not connect");
mysql_select_db("my_db") or die("Can not select database");
// Perform SQL query:
$query = "select * from user";
$qno = mysql_query($query)
or die("Query failed: $query<hr />" . mysql_error();
$n = mysql_num_rows ($qno); // Get number of records selected/affected.
// Output results in HTML:
print "<table border='1'>n";
while ($user = mysql_fetch_assoc($qno)) // While a record is retrieved...
{
// Print column headings if first row
if (!$header_printed)
{
print "t<tr>n";
$fields = array_keys ($user);
PHP Notes 9 Halil Özmen - 08/10/2009
10. PHP Tutorial
reset($user); // Rewind for the next foreach
foreach ($fields as $field)
{ print " <th>$field</th>n"; }
print " </tr>n";
$header_printed = true;
} // end of print header.
// Output data in the record retrieved.
print "t<tr>n";
foreach ($user as $col_value)
{
print "tt<td>$col_value</td>n";
}
print "t</tr>n";
}
print "</table>n";
mysql_free_result($qno); // Free resultset.
mysql_close($dblink); // Close connection.
?>
Communication with Other Databases
Unlike other scripting languages for Web page development, PHP is open-source, cross-platform, and offers
excellent connectivity to most of today's common databases including Oracle, Sybase, MySQL, ODBC (and
others). PHP also offers integration with various external libraries which enable the developer to do anything
from generating PDF documents to parsing XML.
PHP Notes 10 Halil Özmen - 08/10/2009