PHP is a widely used scripting language designed for web development that allows code to be embedded into HTML pages. It can be used to create dynamic web pages through a web server with PHP processing modules. Significant websites like Facebook, Wikipedia, and YouTube use PHP. Security vulnerabilities in PHP code can allow attackers to steal or destroy database data.
This document summarizes the key configuration options and settings in the PHP initialization file (php.ini). It outlines the order PHP searches for this file, describes the development and production php.ini files, and provides an overview of common php.ini directives for expressions, errors, syntax highlighting, paths/directories, and more. Key settings for different PHP modules are also highlighted.
This document provides a tutorial on PHP (Hypertext Preprocessor), a programming language used for web development. It discusses:
- PHP allows developers to create dynamic content that interacts with databases. It is commonly used with MySQL.
- The tutorial is designed for programmers new to PHP concepts with basic computer programming skills.
- It provides an overview of PHP syntax and variable types, and how to set up a PHP development environment on different platforms like Linux, Windows, and MacOS.
PHP is a widely used scripting language originally designed for web development. It code is embedded into HTML and interpreted by a web server to produce dynamic web pages. PHP can also be run from the command line or used for desktop applications. It is available on most operating systems and works with many databases. The PHP source code is free to use and customize.
The document provides an overview of PHP, MySQL, Apache, and how they relate. It discusses:
1) The history and purpose of PHP, MySQL, Apache, and how they work together in the AMP stack.
2) How PHP is used to create dynamic web pages, MySQL is used for data storage, and Apache runs PHP pages.
3) Configuration steps for installing PHP with IIS or WAMP on Windows systems.
PHP is a widely used open source scripting language that is embedded in HTML and interpreted by servers to produce dynamic web pages. It supports features like variables, functions, arrays, sessions, cookies, and connecting to databases like MySQL. PHP code is written in .php files and contains HTML tags. It allows combining of HTML markup and PHP code to create dynamic content.
The document outlines the basic steps in developing a computer program:
1. Define the problem and requirements for input and output.
2. Outline a solution by breaking the problem into smaller tasks and establishing the logic.
3. Develop the outline into an algorithm by specifying the processing steps, variables, and control structures.
4. Test the algorithm for errors by running sample inputs and checking for logical errors before coding.
5. Code the algorithm into a programming language.
6. Run the program to search for remaining logic errors and enhance functionality through testing.
7. Document and maintain the program ongoing from initial definition through final testing.
Everyone must migrate to PHP 7! Take advantage of exceptional performance improvements, cut your hardware use in half and enjoy the best of PHP. This workshop is for everyone that is still eyeing PHP 7 while still using PHP 5, and wants to review their 1 million LOC project before jumping to PHP 7. When migrating, we need to check old code and target only the interesting issues. This session will connect the backward incompatibilities and new features to their actual location in the code, relying on static analysis to quickly process a large code base. Based on our accumulated experience and tools, we'll review the issues, diagnose criticality, select the best fixes and prioritize the tasks. All tools are Open Source, and ready to be integrated into your project lifecycle.
PHP is a scripting language originally designed for web development to produce dynamic web pages. It is especially suited for server-side web development. PHP code is embedded into HTML and executed by the PHP runtime on the web server to create dynamic content. A sample PHP code displays "Hello World" by echoing the text. PHP supports various data types including integers, arrays, strings, and resources. Code optimizers aim to improve PHP performance by reducing code size and execution time. PHP includes many open source libraries and allows developers to extend its functionality through extensions written in C.
This document summarizes the key configuration options and settings in the PHP initialization file (php.ini). It outlines the order PHP searches for this file, describes the development and production php.ini files, and provides an overview of common php.ini directives for expressions, errors, syntax highlighting, paths/directories, and more. Key settings for different PHP modules are also highlighted.
This document provides a tutorial on PHP (Hypertext Preprocessor), a programming language used for web development. It discusses:
- PHP allows developers to create dynamic content that interacts with databases. It is commonly used with MySQL.
- The tutorial is designed for programmers new to PHP concepts with basic computer programming skills.
- It provides an overview of PHP syntax and variable types, and how to set up a PHP development environment on different platforms like Linux, Windows, and MacOS.
PHP is a widely used scripting language originally designed for web development. It code is embedded into HTML and interpreted by a web server to produce dynamic web pages. PHP can also be run from the command line or used for desktop applications. It is available on most operating systems and works with many databases. The PHP source code is free to use and customize.
The document provides an overview of PHP, MySQL, Apache, and how they relate. It discusses:
1) The history and purpose of PHP, MySQL, Apache, and how they work together in the AMP stack.
2) How PHP is used to create dynamic web pages, MySQL is used for data storage, and Apache runs PHP pages.
3) Configuration steps for installing PHP with IIS or WAMP on Windows systems.
PHP is a widely used open source scripting language that is embedded in HTML and interpreted by servers to produce dynamic web pages. It supports features like variables, functions, arrays, sessions, cookies, and connecting to databases like MySQL. PHP code is written in .php files and contains HTML tags. It allows combining of HTML markup and PHP code to create dynamic content.
The document outlines the basic steps in developing a computer program:
1. Define the problem and requirements for input and output.
2. Outline a solution by breaking the problem into smaller tasks and establishing the logic.
3. Develop the outline into an algorithm by specifying the processing steps, variables, and control structures.
4. Test the algorithm for errors by running sample inputs and checking for logical errors before coding.
5. Code the algorithm into a programming language.
6. Run the program to search for remaining logic errors and enhance functionality through testing.
7. Document and maintain the program ongoing from initial definition through final testing.
Everyone must migrate to PHP 7! Take advantage of exceptional performance improvements, cut your hardware use in half and enjoy the best of PHP. This workshop is for everyone that is still eyeing PHP 7 while still using PHP 5, and wants to review their 1 million LOC project before jumping to PHP 7. When migrating, we need to check old code and target only the interesting issues. This session will connect the backward incompatibilities and new features to their actual location in the code, relying on static analysis to quickly process a large code base. Based on our accumulated experience and tools, we'll review the issues, diagnose criticality, select the best fixes and prioritize the tasks. All tools are Open Source, and ready to be integrated into your project lifecycle.
PHP is a scripting language originally designed for web development to produce dynamic web pages. It is especially suited for server-side web development. PHP code is embedded into HTML and executed by the PHP runtime on the web server to create dynamic content. A sample PHP code displays "Hello World" by echoing the text. PHP supports various data types including integers, arrays, strings, and resources. Code optimizers aim to improve PHP performance by reducing code size and execution time. PHP includes many open source libraries and allows developers to extend its functionality through extensions written in C.
Python is General purpose, High level programming language.Python is one of the simplest language ever. Syntaxes are simple, easy to
remember and quite expressive. When it comes to learning, it has been found that the learning curve for python is quite steeper compared to other programming languages.Python being freeware, you don’t have to spend on licensing. And since it is open source so its original source code is freely available and can be redistributed and modifiable.Python was developed to bridge the gap between C and shell
scripting and also include the feature of exception handling from ABC language. So we can say that, initially Python was interpreted language. But later it was made compiled and interpreted both.
Learn more about Python programming with Learnbay.
Visit:www.learnbay.co
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and generates HTML that is sent to the browser. Key elements of PHP include variables, comments, and the php.ini configuration file.
PHP is a programming language used for building dynamic web sites. PHP code is embedded within HTML and runs on the web server, generating web pages dynamically as requested by visitors. PHP allows for easy creation of dynamic content. Common web programming technologies that PHP can be compared to include ASP, ASP.NET, Perl, Java, Python, Ruby, ColdFusion and more. PHP provides tools for building arrays, loops, functions and other essential elements for programming dynamic web applications.
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.
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and plain HTML is sent to the browser. Variables, comments, and basic syntax follow standard rules. The php.ini configuration file controls PHP behavior and settings.
This document provides an introduction and overview of PHP, including:
1. PHP is an open-source scripting language used for web development that allows developers to add dynamic content to websites. It can be embedded into HTML and is commonly used to create dynamic websites.
2. Key features of PHP include that it is free, runs on most web servers, and supports a wide range of databases. It allows developers to generate dynamic page content, collect form data, and more.
3. The document discusses PHP syntax, variables, embedding PHP code in web pages, and outputting data through functions like print(), echo(), and sprintf(). It provides examples of how to write PHP code and integrate it into HTML
This document provides a 3-step tutorial for beginners to set up a PHP development environment on their local machine and write simple PHP scripts. Step 1 explains how to install a local server like WAMP. Step 2 demonstrates a "Hello World" PHP script and how to test it. Step 3 introduces PHP variables and shows a simple example of echoing a variable.
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.
The document provides instructions on installing MySQL on Windows, including downloading the installer, selecting a setup type, and starting MySQL for the first time. It also demonstrates how to create and populate tables, insert and retrieve data, and test MySQL functionality using PHP. Basic SQL commands for creating, modifying, and querying databases and tables are also explained.
This document provides notes on web programming unit 2 prepared by Bhavsingh Maloth. It discusses the history and objectives of JavaScript, defining it as a scripting language used to add interactivity to HTML pages. JavaScript can be divided into core, client-side, and server-side components. Core JavaScript is the basis of the language, while client-side JavaScript supports browser controls and user interactions. Server-side JavaScript makes the language useful on web servers. The document also provides examples of how to write text, insert scripts, and use variables in JavaScript.
The document provides information about PHP and web development concepts. It discusses:
- PHP is a server-side scripting language used for web development. It was created in 1994 and allows for dynamic content and database integration.
- PHP supports common data types, operators, and control structures like conditional statements and loops to control program flow.
- Variables, cookies, and sessions allow storing and transferring data across web requests. Cookies are stored on the client-side while sessions use server-side storage.
- Advanced PHP concepts include security, performance, and scalability. Object state can be stored in sessions using serialization and unserialization.
PHP is a widely-used scripting language for web development that is embedded into HTML. It runs on web servers and takes PHP code as input to create web pages as output. To use PHP for websites, you need PHP itself installed on a web server along with having a web browser. This document provides instructions on installing PHP and configuring it to work with an Apache web server on Linux. It describes downloading and extracting the PHP files, editing the configuration file php.ini, and restarting the web server for the changes to take effect.
The PHP date() function formats timestamps to readable dates and times. It takes a format string as the first parameter to specify how the date/time should be formatted. Common format characters include d for day, m for month, and Y for year. The date() function can also take an optional second parameter, which is a timestamp. If no timestamp is provided, it will use the current date and time. Cookies are often used to identify users across multiple pages. The setcookie() function creates a cookie, while $_COOKIE retrieves cookie values. Sessions in PHP allow information to be stored and retrieved across multiple pages for a single user.
The document discusses APIs and provides examples of RESTful APIs. It describes how RESTful APIs are built upon a domain model to provide resources that can be navigated through requests. This allows clients to construct custom requests to get precisely the data needed, rather than requiring multiple calls or getting excess data. The domain model also provides a unified framework for request and response semantics.
This document describes a cuisine management system that allows users to search for recipes and add their own recipes online. It is a project by Reachgujarat.com in partnership with TCGL to provide a one-stop solution for business, travel, and tourism in Gujarat. The system was developed using PHP and MySQL with Dreamweaver as the editor. It includes functions for recipe search and addition, as well as travel booking features. Data flow diagrams were used in the design and both front-end and back-end aspects were tested on internal and live servers.
This document provides an overview of applet programming in Java. It discusses the basics of applets including the applet lifecycle, differences between applications and applets, parameters in applets, and the delegation event model. It also covers input/output in applets, using the repaint() method, and creating buttons and text fields. The document includes examples of a simple applet class and using an applet viewer to test applets.
Aspect oriented programming (AOP) allows developers to separate cross-cutting concerns from the main application code. This helps keep code organized and focused on single responsibilities. AOP works by defining points in the program execution, called join points, where additional behavior can be inserted. This additional behavior is defined through advice that runs before, after, or around join points. Pointcuts are used to identify which join points specific advice should apply to. Aspects group advice and pointcuts to encapsulate a concern.
PHP is a server-side scripting language commonly used for web development. It allows developers to create dynamic content that interacts with databases. Key features of PHP include PHP tags to delimit PHP code, many built-in functions, and operators to perform tasks like mathematical operations and variable assignment.
PHP is a server-side scripting language used for web development. It allows developers to embed PHP code into HTML pages which is then interpreted and executed by a PHP processor on the server to generate dynamic web pages. PHP code is contained within special tags and can be used to store and retrieve data from databases, create forms, send emails, and more. Some key PHP features include variables, functions, object-oriented capabilities, and file uploads. The php.ini configuration file controls aspects of PHP's behavior.
The document discusses securing an Apache web server. Key points include:
- Hardening the operating system and only running Apache on the server
- Restricting Apache modules and features to only those necessary
- Running Apache in a chroot jail to limit its access to the file system
- Configuring Apache, related modules like PHP/Perl, and prerequisites securely
This document contains notes on PHP covering topics such as:
- PHP is a popular scripting language suited for web development created by Rasmus Lerdorf in 1994.
- Advantages of PHP include being open source, supporting many databases, and being platform independent.
- PHP can be used to build dynamic web applications with MySQL, handle dynamic content and sessions, and encrypt data.
- XAMPP is a free and open source package used to install PHP on Windows, Linux, and Mac operating systems.
- PHP variables, constants, data types, functions, and operators are explained.
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and generates HTML that is sent to the browser. Key elements of PHP include variables, comments, and the php.ini configuration file.
Python is General purpose, High level programming language.Python is one of the simplest language ever. Syntaxes are simple, easy to
remember and quite expressive. When it comes to learning, it has been found that the learning curve for python is quite steeper compared to other programming languages.Python being freeware, you don’t have to spend on licensing. And since it is open source so its original source code is freely available and can be redistributed and modifiable.Python was developed to bridge the gap between C and shell
scripting and also include the feature of exception handling from ABC language. So we can say that, initially Python was interpreted language. But later it was made compiled and interpreted both.
Learn more about Python programming with Learnbay.
Visit:www.learnbay.co
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and generates HTML that is sent to the browser. Key elements of PHP include variables, comments, and the php.ini configuration file.
PHP is a programming language used for building dynamic web sites. PHP code is embedded within HTML and runs on the web server, generating web pages dynamically as requested by visitors. PHP allows for easy creation of dynamic content. Common web programming technologies that PHP can be compared to include ASP, ASP.NET, Perl, Java, Python, Ruby, ColdFusion and more. PHP provides tools for building arrays, loops, functions and other essential elements for programming dynamic web applications.
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.
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and plain HTML is sent to the browser. Variables, comments, and basic syntax follow standard rules. The php.ini configuration file controls PHP behavior and settings.
This document provides an introduction and overview of PHP, including:
1. PHP is an open-source scripting language used for web development that allows developers to add dynamic content to websites. It can be embedded into HTML and is commonly used to create dynamic websites.
2. Key features of PHP include that it is free, runs on most web servers, and supports a wide range of databases. It allows developers to generate dynamic page content, collect form data, and more.
3. The document discusses PHP syntax, variables, embedding PHP code in web pages, and outputting data through functions like print(), echo(), and sprintf(). It provides examples of how to write PHP code and integrate it into HTML
This document provides a 3-step tutorial for beginners to set up a PHP development environment on their local machine and write simple PHP scripts. Step 1 explains how to install a local server like WAMP. Step 2 demonstrates a "Hello World" PHP script and how to test it. Step 3 introduces PHP variables and shows a simple example of echoing a variable.
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.
The document provides instructions on installing MySQL on Windows, including downloading the installer, selecting a setup type, and starting MySQL for the first time. It also demonstrates how to create and populate tables, insert and retrieve data, and test MySQL functionality using PHP. Basic SQL commands for creating, modifying, and querying databases and tables are also explained.
This document provides notes on web programming unit 2 prepared by Bhavsingh Maloth. It discusses the history and objectives of JavaScript, defining it as a scripting language used to add interactivity to HTML pages. JavaScript can be divided into core, client-side, and server-side components. Core JavaScript is the basis of the language, while client-side JavaScript supports browser controls and user interactions. Server-side JavaScript makes the language useful on web servers. The document also provides examples of how to write text, insert scripts, and use variables in JavaScript.
The document provides information about PHP and web development concepts. It discusses:
- PHP is a server-side scripting language used for web development. It was created in 1994 and allows for dynamic content and database integration.
- PHP supports common data types, operators, and control structures like conditional statements and loops to control program flow.
- Variables, cookies, and sessions allow storing and transferring data across web requests. Cookies are stored on the client-side while sessions use server-side storage.
- Advanced PHP concepts include security, performance, and scalability. Object state can be stored in sessions using serialization and unserialization.
PHP is a widely-used scripting language for web development that is embedded into HTML. It runs on web servers and takes PHP code as input to create web pages as output. To use PHP for websites, you need PHP itself installed on a web server along with having a web browser. This document provides instructions on installing PHP and configuring it to work with an Apache web server on Linux. It describes downloading and extracting the PHP files, editing the configuration file php.ini, and restarting the web server for the changes to take effect.
The PHP date() function formats timestamps to readable dates and times. It takes a format string as the first parameter to specify how the date/time should be formatted. Common format characters include d for day, m for month, and Y for year. The date() function can also take an optional second parameter, which is a timestamp. If no timestamp is provided, it will use the current date and time. Cookies are often used to identify users across multiple pages. The setcookie() function creates a cookie, while $_COOKIE retrieves cookie values. Sessions in PHP allow information to be stored and retrieved across multiple pages for a single user.
The document discusses APIs and provides examples of RESTful APIs. It describes how RESTful APIs are built upon a domain model to provide resources that can be navigated through requests. This allows clients to construct custom requests to get precisely the data needed, rather than requiring multiple calls or getting excess data. The domain model also provides a unified framework for request and response semantics.
This document describes a cuisine management system that allows users to search for recipes and add their own recipes online. It is a project by Reachgujarat.com in partnership with TCGL to provide a one-stop solution for business, travel, and tourism in Gujarat. The system was developed using PHP and MySQL with Dreamweaver as the editor. It includes functions for recipe search and addition, as well as travel booking features. Data flow diagrams were used in the design and both front-end and back-end aspects were tested on internal and live servers.
This document provides an overview of applet programming in Java. It discusses the basics of applets including the applet lifecycle, differences between applications and applets, parameters in applets, and the delegation event model. It also covers input/output in applets, using the repaint() method, and creating buttons and text fields. The document includes examples of a simple applet class and using an applet viewer to test applets.
Aspect oriented programming (AOP) allows developers to separate cross-cutting concerns from the main application code. This helps keep code organized and focused on single responsibilities. AOP works by defining points in the program execution, called join points, where additional behavior can be inserted. This additional behavior is defined through advice that runs before, after, or around join points. Pointcuts are used to identify which join points specific advice should apply to. Aspects group advice and pointcuts to encapsulate a concern.
PHP is a server-side scripting language commonly used for web development. It allows developers to create dynamic content that interacts with databases. Key features of PHP include PHP tags to delimit PHP code, many built-in functions, and operators to perform tasks like mathematical operations and variable assignment.
PHP is a server-side scripting language used for web development. It allows developers to embed PHP code into HTML pages which is then interpreted and executed by a PHP processor on the server to generate dynamic web pages. PHP code is contained within special tags and can be used to store and retrieve data from databases, create forms, send emails, and more. Some key PHP features include variables, functions, object-oriented capabilities, and file uploads. The php.ini configuration file controls aspects of PHP's behavior.
The document discusses securing an Apache web server. Key points include:
- Hardening the operating system and only running Apache on the server
- Restricting Apache modules and features to only those necessary
- Running Apache in a chroot jail to limit its access to the file system
- Configuring Apache, related modules like PHP/Perl, and prerequisites securely
This document contains notes on PHP covering topics such as:
- PHP is a popular scripting language suited for web development created by Rasmus Lerdorf in 1994.
- Advantages of PHP include being open source, supporting many databases, and being platform independent.
- PHP can be used to build dynamic web applications with MySQL, handle dynamic content and sessions, and encrypt data.
- XAMPP is a free and open source package used to install PHP on Windows, Linux, and Mac operating systems.
- PHP variables, constants, data types, functions, and operators are explained.
PHP is a server-side scripting language commonly used for web development. It is free, open source, and can interface with many databases. PHP code is executed on the server and generates HTML that is sent to the browser. Key elements of PHP include variables, comments, and the php.ini configuration file.
Table Of Content
The OWASP Top Ten
Invalidated Redirect and Forwards
Security Misconfiguration
Application Fingerprint
Error handling And Logging
Noise
PHP Guidelines
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.
This document provides an overview of PHP (Hypertext Preprocessor), a widely-used open source scripting language especially suited for web development. It can be embedded into HTML and is executed on the server. PHP files contain text, HTML tags, and scripts enclosed in special PHP tags. An example PHP file is shown that outputs "Hello World". Reasons for using PHP include that it is open source, cross-platform, has free development tools, and supports many databases. PHP can be used for server-side scripting, command line scripting, and desktop applications. The installation procedure and basic PHP scripts, variables, operators, and functions are also outlined.
Covered some of the Best Practices.
Reference:
http://www.brandonsavage.net/essential-ini-settings/
http://shiflett.org/blog/2005/feb/my-top-two-php-security-practices
http://www.php.net/manual/en/security.php
This document summarizes best practices for PHP coding standards, documentation, version control, and security. It recommends using an established coding standard like Zend or PEAR for consistency. It also recommends the PHP_CodeSniffer tool to check standards, and phpDocumentor for documenting code. Subversion is presented as an option for version control. For security, it emphasizes filtering all input and escaping all output.
Brief History of PHP
PHP (PHP: Hypertext Preprocessor) was created by Rasmus Lerdorf in 1994. It was initially developed for HTTP usage logging and server-side form generation in Unix.
PHP 2 (1995) transformed the language into a Server-side embedded scripting language. Added database support, file uploads, variables, arrays, recursive functions, conditionals, iteration, regular expressions, etc.
PHP 3 (1998) added support for ODBC data sources, multiple platform support, email protocols (SNMP,IMAP), and new parser written by Zeev Suraski and Andi Gutmans .
PHP 4 (2000) became an independent component of the web server for added efficiency. The parser was renamed the Zend Engine. Many security features were added.
PHP 5 (2004) adds Zend Engine II with object oriented programming, robust XML support using the libxml2 library, SOAP extension for interoperability with Web Services, SQLite has been bundled with PHP
What is PHP Used For?
PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages
PHP can interact with MySQL databases
What is PHP?
PHP == ‘Hypertext Preprocessor’
Open-source, server-side scripting language
Used to generate dynamic web-pages
PHP scripts reside between reserved PHP tags
This allows the programmer to embed PHP scripts within HTML pages
What is PHP (cont’d)
Interpreted language, scripts are parsed at run-time rather than compiled beforehand
Executed on the server-side
Source-code not visible by client
‘View Source’ in browsers does not display the PHP code
Various built-in functions allow for fast development
Compatible with many popular databases
What does PHP code look like?
Structurally similar to C/C++
Supports procedural and object-oriented paradigm (to some degree)
All PHP statements end with a semi-colon
Each PHP script must be enclosed in the reserved PHP tag
Comments in PHP
Standard C, C++, and shell comment symbols
Variables in PHP
PHP variables must begin with a “$” sign
Case-sensitive ($Foo != $foo != $fOo)
Global and locally-scoped variables
Global variables can be used anywhere
Local variables restricted to a function or class
Certain variable names reserved by PHP
Form variables ($_POST, $_GET)
Server variables ($_SERVER)
Etc.
Variable usage
Arithmetic Operations
$a - $b // subtraction
$a * $b // multiplication
$a / $b // division
$a += 5 // $a = $a+5 Also works for *= and /=
Concatenation
Use a period to join strings into one.
If ... Else...
If (condition)
{
Statements;
}
Else
{
Statement;
}
While Loops
While (condition)
{
Statements;
}
Date Display
$datedisplay=date(“yyyy/m/d”);
Print $datedisplay;
# If the date is April 1st, 2009
# It would display as 2009/4/1
Month, Day & Date Format Symbols
PHP is a scripting language used to create dynamic web pages. It allows web developers to quickly write dynamically generated pages. To work with PHP, packages like Apache, PHP, and MySQL need to be downloaded and installed. These packages together are called LAMP (Linux) or WAMP (Windows). PHP basics include syntax, operators, variables, strings, and arrays. It also supports flow control and looping. PHP can connect to databases and handle file uploads. Its simplicity makes it appealing for beginners to create web applications using its built-in functions.
PHP is a server-side scripting language used for web development. It allows developers to add dynamic content to websites. PHP code is embedded in HTML and processed on the server to create output that includes both HTML code and the results of the PHP scripts. The document provides an overview of PHP, including its characteristics, requirements to run PHP scripts, syntax, common loops and arrays, string functions, file inclusion methods, and GET and POST methods for form data submission.
PHP is a server-side scripting language used for web development. It allows developers to add dynamic content to websites. PHP code is embedded in HTML and processed on the server to create output that includes both HTML code and the results of the PHP code. The document provides an overview of PHP, including its characteristics, requirements to run PHP, syntax, loop types, arrays, strings, file inclusion, and GET and POST methods.
The document summarizes PHP, an open-source scripting language commonly used for web development. PHP can be embedded into HTML and is interpreted by web servers to create dynamic web pages. Key points covered include PHP's origins, popularity, uses, and how to install and configure it by placing PHP files on a web server and ensuring the server can parse the files. The document also provides links to tutorials on installing PHP and its dependencies.
PHP is a server-side scripting language commonly used for web development. It allows developers to create dynamic content that interacts with databases. Key features of PHP include PHP tags to delimit PHP code, many built-in functions, and operators to perform tasks like mathematical operations and variable assignment.
PHP is a server-side scripting language commonly used for web development. It allows developers to create dynamic content that interacts with databases. Key features of PHP include PHP tags to delimit PHP code, many built-in functions, and operators to perform tasks like mathematical operations and variable assignment.
PHP is a server-side scripting language used for web development that allows developers to create dynamic web pages. Some key points:
- PHP scripts are executed on the server and can contain HTML tags, text, and PHP code.
- PHP can connect to databases like MySQL and supports features like forms, sessions, cookies, and functions.
- Common control structures include if/else statements and while loops. Functions must be defined before use.
- To interact with databases, a connection is made, a database is selected, queries are performed, results are processed, and the connection is closed.
The document discusses PHP Tainted variables, a security feature for PHP that tracks tainted data through a program and detects vulnerabilities like code injection. It propagates taint status through operations and detects when tainted data reaches sensitive sinks like echo without sanitization. It has low 1-2% runtime overhead and supports configurable enforcement levels from logging to termination. The project aims to make taint tracking a realistic always-on option for PHP applications.
Database Normalization
The term Normalization is a process by which we can efficiently organize the data in a database. It associates relationship between individual tables according to policy designed both to care for the data and to create the database more flexible by eliminating redundancy and inconsistent dependency.
In other words, Database normalization is a process by which a presented database is tailored to bring its component tables into compliance with a sequence of progressive standard forms. It is an organized way of ensuring that a database construction is appropriate for general purpose querying and also includes the functions of insertion, deletion and updating.
Edgar Frank Codd was the person who introduced the process of database normalization firstly in his paper called A Relational Model of Data for Large Shared Data Banks. The two main objective of database normalization is eliminating redundant data and ensuring data dependencies make sense and make sure that every non-key column in every table is directly reliant on the key and the whole key.
Redundant data or unnecessary data will take more and more space in the database and later, creates the maintenance problem in the database. If data that exists in more than one place must be changed because it wastes disk space and the data must be changed in exactly the same way in all locations of the table.
Photochemical smog is a type of air pollution formed when sunlight interacts with nitrogen oxides and volatile organic compounds in the atmosphere. Nitrogen oxides come primarily from vehicle and truck exhaust while volatile organic compounds are emitted from products like paints, pesticides, and glues. This chemical reaction forms secondary pollutants like peroxyacetyl nitrate which can cause respiratory issues. Mexico City has high levels of photochemical smog due to vehicle emissions and geographic factors trapping pollution. Reducing vehicle use, industrial emissions, and VOC-emitting products can help lower smog levels and protect public health. The Great Smog of 1952 in London showed the deadly potential of severe smog, causing thousands of premature deaths.
The document discusses key concepts of Web 2.0 including user interactivity, sharing of information, and use on social networking sites and blogs. It describes characteristics like rich user experience, user participation, dynamic content, and web standards. Common applications that use Web 2.0 concepts are discussed like AJAX, Adobe Flash, and languages used by developers like PHP and Python. Taxonomy and its use for categorizing content on Web 2.0 sites is also covered.
AJAX allows for asynchronous data retrieval and interaction with web pages. It uses a combination of XHTML, CSS, JavaScript, and the XMLHttpRequest object to retrieve and update content without reloading the entire page. The XMLHttpRequest object sends and receives data from the server in the background without interfering with the display and behavior of the existing page. This allows for asynchronous updating of content within a page.
This document provides instructions for installing and configuring Apache HTTP Server on Linux. It describes downloading and extracting the Apache files, editing the configuration files such as httpd.conf to configure settings like the server name, ports, document root, error logs, and supplemental configuration files. It also explains how to set up virtual hosting by editing httpd.conf to include a vhosts.conf file, then creating that file and adding directives to allow multiple websites on different domains to run on the same IP address.
Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation of structured documents like HTML. CSS allows separation of document content from document presentation, including elements like layout, colors, and fonts. CSS has a simple syntax using English keywords to specify style properties in rules and declaration blocks.
HTML is the main markup language used to structure web pages. It uses tags to denote headings, paragraphs, lists, links and other elements. HTML documents are composed of elements that have start and end tags containing attributes and content. HTML applications use HTML and Dynamic HTML in a browser to provide a graphical interface, unlike regular HTML files which are confined to web browsers.
Linux is a prominent example of free and open source software. It can be installed on a wide variety of devices from embedded systems to supercomputers. Linux is commonly used for servers, with estimates that it powers around 60% of web servers. Linux distributions package the Linux kernel with other software like utilities, libraries and desktop environments. Programming languages and build tools like GCC are supported. Embedded Linux is often used in devices due to its low cost and ease of modification.
MySQL is a relational database management system that is open-source and can be installed from binary packages. It is commonly used for small to medium web applications and can be managed through command line tools or graphical interfaces. SQL queries are used to manage the database structure and data.
1. PHP: Hypertext Preprocessor PHP: Hypertext Preprocessor is a widely used, general-purpose scripting language that was originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document.
2. Usage: PHP is a general-purpose scripting language that is especially suited to server-side web development where PHP generally runs on a web server. Any PHP code in a requested file is executed by the PHP runtime, usually to create dynamic web page content. It can also be used for command-line scripting and client-side GUI applications.
3. As of April 2007, over 20 million Internet domains had web services hosted on servers with PHP installed and mod_php was recorded as the most popular Apache HTTP Server module. Significant websites are written in PHP including the user-facing portion of Facebook, Wikipedia (MediaWiki), Yahoo!, MyYearbook,Digg,Joomla, eZ Publish, WordPress, YouTube in its early stages, Drupal, Tagged and Moodle.
4. The National Vulnerability Database stores all vulnerabilities found in computer software. The overall proportion of PHP-related vulnerabilities on the database amounted to: 20% in 2004, 28% in 2005, 43% in 2006, 36% in 2007, 35% in 2008, and 30% in 2009. Most of these PHP-related vulnerabilities can be exploited remotely: they allow crackers to steal or destroy data from data sources linked to the webserver (such as an SQL database), send spam or contribute to DoS attacks using malware, which itself can be installed on the vulnerable servers. Security:
5. Syntax: PHP only parses code within its delimiters. Anything outside its delimiters is sent directly to the output and is not processed by PHP (although non-PHP text is still subject to control structures described within PHP code). The most common delimiters are <?php to open and ?> to close PHP sections. <script language="php"> and </script> delimiters are also available, as are the shortened forms <? or <?= (which is used to echo back a string or variable) and ?> as well as ASP-style short forms <% or <%= and %>. While short delimiters are used, they make script files less portable as their purpose can be disabled in the PHP configuration, and so they are discouraged.The purpose of all these delimiters is to separate PHP code from non-PHP code, including HTML
6. <html> <head> <title>PHP Test</title> </head> <body> <?php echo "Hello World"; /* echo("Hello World"); works as well, although echo isn't a function (it's a language construct). In some cases, such as when multiple parameters are passed to echo, parameters cannot be enclosed in parentheses */ ?> </body> </html> Example:
8. Again the installation of the php editor will need the xampp server[ is a free and open source cross-platform web server package, consisting mainly of the Apache HTTP Server, MySQL database, and interpreters for scripts written in the PHP and Perl programming languages .] Step 1: We need to have the xampp for linux inorder the run applications so(as per step 1) ,download the xampp for linux with any favourable version on to the computer
9. Step 2: After the successful downloading,we need to extract the 'tar' file on to the system,select a path and just extract them using the following commands gunzip -d httpd-2_0_NN.tar.gz tar xvf httpd-2_0_NN.tar *NN -refers to the current xampp version
11. PHP comes packaged with two INI files. One that is recommended to be used in production environments and one that is recommended to be used indevelopment environments. php.ini-production contains settings which hold security, performance and best practices at its core. But please be aware, these settings may break compatibility with older or less security conscience applications. We recommending using the production ini in production and testing environments. php.ini-development is very similar to its production variant, except it's much more verbose when it comes to errors. We recommending using the development version only in development environments as errors shown to application users can inadvertently leak otherwise secure information. CONFIGURATION FILE
12. Directives are specified using the following syntax: directive = value Directive names are *case sensitive* - foo=bar is different from FOO=bar. Directives are variables used to configure PHP or PHP extensions.There is no name validation. If PHP can't find an expected directive because it is not set or is mistyped, a default value will be used. DIRECTORIES SPECIFICATION
13. EXPRESSIONS: Expressions in the INI file are limited to bitwise operators and parentheses: | bitwise OR ^ bitwise XOR & bitwise AND ~ bitwise NOT ! boolean NOT
14. EMPTY STRINGS: An empty string can be denoted by simply not writing anything after the equal sign, or by using the None keyword: ABC = ; sets foo to an empty string ABC = None ; sets foo to an empty string ABC = "None" ; sets foo to the string 'None' *ABC -SECTION HEADER
15. php.ini OPTIONS Name for user-defined php.ini (.htaccess) files. Default is ".user.ini" user_ini.filename = ".user.ini" To disable this feature set this option to empty value user_ini.filename = TTL for user-defined php.ini files (time-to-live) in seconds. Default is 300 seconds (5 minutes) user_ini.cache_ttl = 300
16. LANGUAGE OPTIONS Enable the PHP scripting language engine under Apache. http://php.net/engine engine = On
17. SAFE MODE: Safe Mode http://php.net/safe-mode safe_mode = Off By default, Safe Mode does a UID compare check when opening files. If you want to relax this to a GID compare, then turn on safe_mode_gid. http://php.net/safe-mode-gid safe_mode_gid = Off When safe_mode is on, UID/GID checks are bypassed when including files from this directory and its subdirectories. (directory must also be in include_path or full path must be used when including) http://php.net/safe-mode-include-dir safe_mode_include_dir = When safe_mode is on, only executables located in the safe_mode_exec_dir will be allowed to be executed via the exec family of functions. http://php.net/safe-mode-exec-dir safe_mode_exec_dir
18. Functions and classes This directive allows you to disable certain functions for security reasons. It receives a comma-delimited list of function names. This directive is *NOT* affected by whether Safe Mode is turned On or Off. http://php.net/disable-functions disable_functions = This directive allows you to disable certain classes for security reasons. It receives a comma-delimited list of class names. This directive is *NOT* affected by whether Safe Mode is turned On or Off. http://php.net/disable-classes disable_classes =
19. Color highlighting Colors for Syntax Highlighting mode. Anything that's acceptable in <span style="color: ???????"> would work. http://php.net/syntax-highlighting highlight.string = #DD0000 highlight.comment = #FF9900 highlight.keyword = #007700 highlight.bg = #FFFFFF highlight.default = #0000BB highlight.html = #000000
20. RESOURCE LIMITS Maximum execution time of each script, in seconds http://php.net/max-execution-time Note: This directive is hardcoded to 0 for the CLI SAPI max_execution_time = 30 Maximum amount of time each script may spend parsing request data. It's a good idea to limit this time on productions servers in order to eliminate unexpectedly long running scripts. Note: This directive is hardcoded to -1 for the CLI SAPI Default Value: -1 (Unlimited) Development Value: 60 (60 seconds) Production Value: 60 (60 seconds) http://php.net/max-input-time max_input_time = 60 Maximum input variable nesting level http://php.net/max-input-nesting-leve l max_input_nesting_level = 64 Maximum amount of memory a script may consume (128MB) http://php.net/memory-limit memory_limit = 128M
21. Error handling and logging ; This directive informs PHP of which errors, warnings and notices you would like ; it to take action for. The recommended way of setting values for this ; directive is through the use of the error level constants and bitwise ; operators. The error level constants are below here for convenience as well as ; some common settings and their meanings. ; By default, PHP is set to take action on all errors, notices and warnings EXCEPT ; those related to E_NOTICE and E_STRICT, which together cover best practices and ; recommended coding standards in PHP. For performance reasons, this is the ; recommend error reporting setting. Your production server shouldn't be wasting ; resources complaining about best practices and coding standards. That's what ; development servers and development settings are for.
22. Error Level Constants: E_ALL - All errors and warnings E_ERROR - fatal run-time errors E_RECOVERABLE_ERROR - almost fatal run-time errors E_WARNING - run-time warnings (non-fatal errors) E_PARSE - compile-time parse errors E_COMPILE_ERROR - fatal compile-time errors E_USER_ERROR - user-generated error message E_USER_WARNING - user-generated warning message E_USER_NOTICE - user-generated notice message E_DEPRECATED - warn about code that will not work in future versions of php
23. Paths and Directories: UNIX: "/path1:/path2" include_path = ".:/php/includes" Windows: "ath1;ath2" include_path = ".;c:hpncludes" PHP's default setting for include_path is "/path/to/php/pear"
24. FILE UPLOADS: Whether to allow HTTP file uploads. http://php.net/file-uploads file_uploads = On Temporary directory for HTTP uploaded files (will use system default if notspecified). http://php.net/upload-tmp-dir upload_tmp_dir = Maximum allowed size for uploaded files. http://php.net/upload-max-filesize upload_max_filesize = 2M
25. DYNAMIC EXTENSIONS: If you wish to have an extension loaded automatically, use the following syntax: extension=modulename.extension For example, on Windows: extension=msql.dll ... or under UNIX: extension=msql.so ... or with a path: extension=/path/to/extension/msql.so