This document provides instructions for a series of PHP tasks to create a form generation system. The tasks involve:
1. Creating an abstract FormField class with common methods and properties for form fields.
2. Implementing subclasses for specific field types like TextInput and ImageUrl that extend FormField and add validation.
3. Creating classes for a SubmitButton and overall Form to contain and manage the fields.
The goal is to build an object-oriented framework to generate forms where fields can be added, validated, and populated with data.
This document contains a practice exam with 18 multiple choice questions about PHP functions and concepts. It is registered to Núria Torrescasana of Manresa, Barcelona, Spain. The questions cover topics like PHP functions, arrays, classes, sessions, strings, dates/time, and file handling. The answers to the questions are provided at the end.
Object Oriented Programming with PHP 5 - More OOPWildan Maulana
The document discusses object-oriented programming concepts in PHP 5 such as class information functions, checking if a class exists, finding loaded classes, checking for methods and properties, class types, and class names. It also covers exception handling, iterators, the ArrayObject class, serialization, cloning, autoloading classes, and method chaining in PHP 5 OOP.
PHP functions allow programmers to divide code into reusable pieces. There are three main types of functions: simple functions that don't take arguments, functions with parameters that allow passing data into the function, and functions with return values that return data out of the function. Functions make code more organized and reusable.
This document provides a summary of common model field options, ModelAdmin options and callbacks, QuerySet methods, aggregation and annotation functions, and datetime formatting codes in Django. It includes field types like CharField, DateTimeField, ForeignKey; ModelAdmin configuration like list_display, list_filter; QuerySet methods like filter, order_by, values; aggregation functions like Avg, Count, Max; and datetime format codes like %Y, %m, %d. It directs the reader to Django and third party documentation for more details.
The document contains a list of 37 PHP interview questions and their answers. Some of the key questions covered include: how to find the number of days between two dates in PHP, how to define a constant, the difference between urlencode and urldecode, how to get uploaded file information, the difference between mysql_fetch_object and mysql_fetch_array, how to pass a variable by reference, how to submit a form without a submit button, how to extract a string from another string using a regular expression, and how to get browser properties using PHP.
This document summarizes an Object Oriented Programming (OOP) lesson on PHP classes. It introduces how to create classes and objects, define properties and methods, use access modifiers like public and private, extend classes through inheritance, and implement interfaces. Key concepts covered include creating objects, accessing properties and methods, using class constants, constructors and destructors, overriding and extending classes, and polymorphism.
The document discusses object-oriented programming concepts in PHP, including classes, objects, methods, properties, inheritance, and polymorphism. It provides examples of defining classes and using them to instantiate objects. Key concepts covered are class definitions, creating object instances, accessing object properties and methods, inheritance between classes, and overriding methods in child classes.
This document provides an overview of the Merb web framework. Some key points:
- Merb emphasizes efficiency and hackability over being a complete monolithic framework
- It aims to have minimal footprint to give apps more system resources
- It is based on Rack and allows interaction with various web servers
- Merb includes routing, request handling, and rendering functionality
- Mailing functionality is also included and mailers work similarly to controllers
- The modularity of Merb allows flexibility in customizing various aspects
This document contains a practice exam with 18 multiple choice questions about PHP functions and concepts. It is registered to Núria Torrescasana of Manresa, Barcelona, Spain. The questions cover topics like PHP functions, arrays, classes, sessions, strings, dates/time, and file handling. The answers to the questions are provided at the end.
Object Oriented Programming with PHP 5 - More OOPWildan Maulana
The document discusses object-oriented programming concepts in PHP 5 such as class information functions, checking if a class exists, finding loaded classes, checking for methods and properties, class types, and class names. It also covers exception handling, iterators, the ArrayObject class, serialization, cloning, autoloading classes, and method chaining in PHP 5 OOP.
PHP functions allow programmers to divide code into reusable pieces. There are three main types of functions: simple functions that don't take arguments, functions with parameters that allow passing data into the function, and functions with return values that return data out of the function. Functions make code more organized and reusable.
This document provides a summary of common model field options, ModelAdmin options and callbacks, QuerySet methods, aggregation and annotation functions, and datetime formatting codes in Django. It includes field types like CharField, DateTimeField, ForeignKey; ModelAdmin configuration like list_display, list_filter; QuerySet methods like filter, order_by, values; aggregation functions like Avg, Count, Max; and datetime format codes like %Y, %m, %d. It directs the reader to Django and third party documentation for more details.
The document contains a list of 37 PHP interview questions and their answers. Some of the key questions covered include: how to find the number of days between two dates in PHP, how to define a constant, the difference between urlencode and urldecode, how to get uploaded file information, the difference between mysql_fetch_object and mysql_fetch_array, how to pass a variable by reference, how to submit a form without a submit button, how to extract a string from another string using a regular expression, and how to get browser properties using PHP.
This document summarizes an Object Oriented Programming (OOP) lesson on PHP classes. It introduces how to create classes and objects, define properties and methods, use access modifiers like public and private, extend classes through inheritance, and implement interfaces. Key concepts covered include creating objects, accessing properties and methods, using class constants, constructors and destructors, overriding and extending classes, and polymorphism.
The document discusses object-oriented programming concepts in PHP, including classes, objects, methods, properties, inheritance, and polymorphism. It provides examples of defining classes and using them to instantiate objects. Key concepts covered are class definitions, creating object instances, accessing object properties and methods, inheritance between classes, and overriding methods in child classes.
This document provides an overview of the Merb web framework. Some key points:
- Merb emphasizes efficiency and hackability over being a complete monolithic framework
- It aims to have minimal footprint to give apps more system resources
- It is based on Rack and allows interaction with various web servers
- Merb includes routing, request handling, and rendering functionality
- Mailing functionality is also included and mailers work similarly to controllers
- The modularity of Merb allows flexibility in customizing various aspects
PHP is a scripting language commonly used for web development. It allows dynamic generation of web page content through embedded PHP code. Some key things PHP can do include interacting with databases, processing user input, file handling, and more. PHP code is embedded within HTML using <?php ?> tags and variables, control structures, and other programming elements allow writing logic and dynamic functionality.
Object Oriented Programming Basics with PHPDaniel Kline
The document provides an introduction to object-oriented programming (OOP) concepts using PHP. It defines OOP and how it relates to procedural programming. Key concepts covered include classes, objects, properties, methods, scopes (public and private), constants, copying and cloning objects. Code examples are provided to demonstrate creating a User class with properties like email and password, and methods to set, get, validate and hash password values. The examples show how to properly encapsulate data within classes and control access to properties and methods using public and private scopes.
This document provides an overview of DataMapper, an object-relational mapper (ORM) library for Ruby applications. It summarizes DataMapper's main features such as associations, migrations, database adapters, naming conventions, validations, custom types and stores. The document also provides examples of how to use DataMapper with different databases, import/export data, and validate models for specific contexts.
This document contains sample questions for the Zend Certification PHP 5 exam. It includes multiple choice questions testing PHP 5 language features and best practices related to topics like XML processing, database access, regular expressions, and security. The questions cover syntax, functions, patterns and other PHP concepts that could appear on the certification exam.
An Introduction to Object-Oriented Programming (DrupalCamp London 2015)Bart Feenstra
If most of your web development work focuses around current stable versions of Drupal, you may be new to object-oriented programming. This is an approach to coding that centers around objects, which are data of their own types (classes) with their own behavior that are defined by developers and can easily be built upon by other developers. It also includes concepts such as interfaces, more compartmentalized design, dependency injection and unit testing.
This session will explain these concepts to you from the point of view of someone coming from procedural programming, which was Drupal’s predominant coding style before version 8. Afterwards, you will be familiar with the main concepts used by Drupal 8 and other modern PHP libraries and frameworks and you will be able to recognize and work with them in your favorite new Drupal version.
This document provides an overview and examples of several design patterns in object-oriented programming with PHP, including Strategy, Factory, Abstract Factory, Adapter, Singleton, Iterator, and Observer patterns. The Strategy pattern allows making decisions on different cases more easily by encapsulating varying implementations of an algorithm. The Factory pattern hides object creation logic and allows for polymorphic object instantiation. The Abstract Factory pattern ensures all created objects conform to a common interface. The Adapter pattern allows incompatible interfaces to work together by wrapping an object to fit expected interfaces. The Singleton pattern ensures only one instance of a class is created. The Iterator pattern provides a way to access elements of an object sequentially without exposing its underlying representation. The Observer pattern allows objects to publish
The document describes the JJEncode JavaScript encoding method that produces files containing only symbol characters like '$','_','+'. It works by first initializing a variable $ to -1 and then creating an object with properties assigned characters from strings. This object is then used to concatenate characters into strings that are assigned to additional properties, including 'constructor'. Finally, the code evaluates (0)['constructor']['constructor'] which calls the constructor function to decode and run the encoded payload. The encoding avoids alphanumeric characters to evade detection but is still possible to analyze how it works.
This document provides a summary of PHP functions and operators. It begins with an overview of variables, data types, and operators. The remainder summarizes key functions for date/time, files, strings, arrays, and output/formatting. Functions are grouped by purpose and described concisely with parameters and return values. Magic constants, visibility and scoping are also briefly covered.
https://speakerdeck.com/willroth/50-laravel-tricks-in-50-minutes - origin
Laravel 5.1 raised the bar for framework documentation, but there's much, much more lurking beneath the surface. In this 50-minute session, we'll explore 50 (yes, 50!) high-leverage implementation tips & tricks that you just won't find in the docs: the IoC Container, Blade, Eloquent, Middleware, Routing, Commands, Queues, Events, Caching — we'll cover them all! Join us as we drink from the fire hose & learn to take advantage of everything that Laravel has to offer to build better software faster!
This document provides an introduction to PHP by outlining its key topics and features. It explains that PHP can be used for server-side web development, command-line scripting, and client-side GUI applications. The document then walks through variables, data types, operators, control structures, and loops in PHP. It provides examples to illustrate PHP syntax and best practices.
This document provides an overview of key concepts that will be covered in Lecture 2 of a Javascript course, including arrays, expressions and operators, functions, if/else and switch constructs, and loop constructs like for, while, and do-while loops. It also discusses data types in Javascript like integers, characters, strings, floats, and booleans. The summary defines arrays as collections of data of the same type with indexes starting at 0. It explains that functions are reusable blocks of code that can accept parameters and return values. Conditionals like if/else and switch-case are covered as constructs to control program flow based on conditions.
This document provides an overview of dependency injection (DI) and how it is implemented in Drupal 8. It begins by explaining DI as a design pattern that allows code to be more reusable, testable and ignorant of dependencies. It then discusses how frameworks like Symfony implement DI using a service container that is configured to inject dependencies. In Drupal 8, services are defined in YAML files and the container is configured using compiler passes. Core services can be accessed directly or by wiring classes into the container as event subscribers or using a factory method for controllers.
The document discusses functions in PHP, including defining functions, passing arguments to functions, returning values from functions, and using global variables. Some key points covered include:
- Functions allow code to be reused and separated into logical subsections, making code more modular, readable, and maintainable.
- Arguments passed to functions can make functions more flexible by allowing different inputs to produce different outputs each time they are called.
- Functions can return values to the calling code using the return statement. Returned values can be variables, arrays, or results of calculations.
- The order arguments are passed to a function matters, as arguments are assigned to placeholder variables in the defined order. Default values can be specified for arguments.
This document discusses principles for writing clean code in functions. It recommends that functions should be small, do one thing, have descriptive names, and avoid side effects. Functions with many arguments or switch statements are harder to understand. Exceptions should be used instead of return codes to indicate errors. Overall, following best practices for functions helps produce code that is easy to read and maintain.
Symfony & Javascript. Combining the best of two worldsIgnacio Martín
This document discusses combining Symfony and JavaScript. It provides a brief history of client-server interactions and explains how JavaScript is now commonly used on the client side. It acknowledges challenges with JavaScript like asynchronous behavior but notes the large community and low barrier to entry. It advocates using Symfony to build APIs and leveraging JavaScript frameworks like Backbone for the front end. It also discusses rendering views with Twig.js and using server-side JavaScript for tasks like streaming data.
Web Based Workforce Training Presentationlstansbury
This document discusses the use of eLearning and web-based workforce training. It notes that eLearning can reduce costs and increase convenience for training employees. However, some studies have found that outcomes may be negatively impacted if the training is not properly adapted to the online medium. The document also provides local examples of companies and organizations in Louisiana that use eLearning for mandatory training and continuing education. It estimates that training costs average around $1,000 per employee when utilizing eLearning.
The document discusses PHP concepts like syntax, data types, variables, arrays, operators, loops, functions, object-oriented programming, classes and methods. It provides code examples for filtering bad words in a string, calculating the sum of digits in an array, and creating a Society class with methods to set and get its name. Real-world uses of PHP concepts are demonstrated, including extending the Society class to output its name when cast to a string.
Why Renting Isn't Throwing Money Away | Scott DilloffScott Dilloff
Scott Dilloff, CEO, presents the myriad of reasons why renting is an often misrepresented alternative to purchasing property. Learn more at http://scottdilloff.net/
The document describes a student PHP meetup group at the University of Edinburgh called EdiPHP. The group meets weekly to learn about PHP and web development topics like databases, frameworks and advanced techniques. The introductory meetup provides an overview of the group and introduces HTML and how PHP can make HTML dynamic by processing PHP code on the server. Attendees are encouraged to follow the group on social media and attend future meetups to learn more.
PHP is a scripting language commonly used for web development. It allows dynamic generation of web page content through embedded PHP code. Some key things PHP can do include interacting with databases, processing user input, file handling, and more. PHP code is embedded within HTML using <?php ?> tags and variables, control structures, and other programming elements allow writing logic and dynamic functionality.
Object Oriented Programming Basics with PHPDaniel Kline
The document provides an introduction to object-oriented programming (OOP) concepts using PHP. It defines OOP and how it relates to procedural programming. Key concepts covered include classes, objects, properties, methods, scopes (public and private), constants, copying and cloning objects. Code examples are provided to demonstrate creating a User class with properties like email and password, and methods to set, get, validate and hash password values. The examples show how to properly encapsulate data within classes and control access to properties and methods using public and private scopes.
This document provides an overview of DataMapper, an object-relational mapper (ORM) library for Ruby applications. It summarizes DataMapper's main features such as associations, migrations, database adapters, naming conventions, validations, custom types and stores. The document also provides examples of how to use DataMapper with different databases, import/export data, and validate models for specific contexts.
This document contains sample questions for the Zend Certification PHP 5 exam. It includes multiple choice questions testing PHP 5 language features and best practices related to topics like XML processing, database access, regular expressions, and security. The questions cover syntax, functions, patterns and other PHP concepts that could appear on the certification exam.
An Introduction to Object-Oriented Programming (DrupalCamp London 2015)Bart Feenstra
If most of your web development work focuses around current stable versions of Drupal, you may be new to object-oriented programming. This is an approach to coding that centers around objects, which are data of their own types (classes) with their own behavior that are defined by developers and can easily be built upon by other developers. It also includes concepts such as interfaces, more compartmentalized design, dependency injection and unit testing.
This session will explain these concepts to you from the point of view of someone coming from procedural programming, which was Drupal’s predominant coding style before version 8. Afterwards, you will be familiar with the main concepts used by Drupal 8 and other modern PHP libraries and frameworks and you will be able to recognize and work with them in your favorite new Drupal version.
This document provides an overview and examples of several design patterns in object-oriented programming with PHP, including Strategy, Factory, Abstract Factory, Adapter, Singleton, Iterator, and Observer patterns. The Strategy pattern allows making decisions on different cases more easily by encapsulating varying implementations of an algorithm. The Factory pattern hides object creation logic and allows for polymorphic object instantiation. The Abstract Factory pattern ensures all created objects conform to a common interface. The Adapter pattern allows incompatible interfaces to work together by wrapping an object to fit expected interfaces. The Singleton pattern ensures only one instance of a class is created. The Iterator pattern provides a way to access elements of an object sequentially without exposing its underlying representation. The Observer pattern allows objects to publish
The document describes the JJEncode JavaScript encoding method that produces files containing only symbol characters like '$','_','+'. It works by first initializing a variable $ to -1 and then creating an object with properties assigned characters from strings. This object is then used to concatenate characters into strings that are assigned to additional properties, including 'constructor'. Finally, the code evaluates (0)['constructor']['constructor'] which calls the constructor function to decode and run the encoded payload. The encoding avoids alphanumeric characters to evade detection but is still possible to analyze how it works.
This document provides a summary of PHP functions and operators. It begins with an overview of variables, data types, and operators. The remainder summarizes key functions for date/time, files, strings, arrays, and output/formatting. Functions are grouped by purpose and described concisely with parameters and return values. Magic constants, visibility and scoping are also briefly covered.
https://speakerdeck.com/willroth/50-laravel-tricks-in-50-minutes - origin
Laravel 5.1 raised the bar for framework documentation, but there's much, much more lurking beneath the surface. In this 50-minute session, we'll explore 50 (yes, 50!) high-leverage implementation tips & tricks that you just won't find in the docs: the IoC Container, Blade, Eloquent, Middleware, Routing, Commands, Queues, Events, Caching — we'll cover them all! Join us as we drink from the fire hose & learn to take advantage of everything that Laravel has to offer to build better software faster!
This document provides an introduction to PHP by outlining its key topics and features. It explains that PHP can be used for server-side web development, command-line scripting, and client-side GUI applications. The document then walks through variables, data types, operators, control structures, and loops in PHP. It provides examples to illustrate PHP syntax and best practices.
This document provides an overview of key concepts that will be covered in Lecture 2 of a Javascript course, including arrays, expressions and operators, functions, if/else and switch constructs, and loop constructs like for, while, and do-while loops. It also discusses data types in Javascript like integers, characters, strings, floats, and booleans. The summary defines arrays as collections of data of the same type with indexes starting at 0. It explains that functions are reusable blocks of code that can accept parameters and return values. Conditionals like if/else and switch-case are covered as constructs to control program flow based on conditions.
This document provides an overview of dependency injection (DI) and how it is implemented in Drupal 8. It begins by explaining DI as a design pattern that allows code to be more reusable, testable and ignorant of dependencies. It then discusses how frameworks like Symfony implement DI using a service container that is configured to inject dependencies. In Drupal 8, services are defined in YAML files and the container is configured using compiler passes. Core services can be accessed directly or by wiring classes into the container as event subscribers or using a factory method for controllers.
The document discusses functions in PHP, including defining functions, passing arguments to functions, returning values from functions, and using global variables. Some key points covered include:
- Functions allow code to be reused and separated into logical subsections, making code more modular, readable, and maintainable.
- Arguments passed to functions can make functions more flexible by allowing different inputs to produce different outputs each time they are called.
- Functions can return values to the calling code using the return statement. Returned values can be variables, arrays, or results of calculations.
- The order arguments are passed to a function matters, as arguments are assigned to placeholder variables in the defined order. Default values can be specified for arguments.
This document discusses principles for writing clean code in functions. It recommends that functions should be small, do one thing, have descriptive names, and avoid side effects. Functions with many arguments or switch statements are harder to understand. Exceptions should be used instead of return codes to indicate errors. Overall, following best practices for functions helps produce code that is easy to read and maintain.
Symfony & Javascript. Combining the best of two worldsIgnacio Martín
This document discusses combining Symfony and JavaScript. It provides a brief history of client-server interactions and explains how JavaScript is now commonly used on the client side. It acknowledges challenges with JavaScript like asynchronous behavior but notes the large community and low barrier to entry. It advocates using Symfony to build APIs and leveraging JavaScript frameworks like Backbone for the front end. It also discusses rendering views with Twig.js and using server-side JavaScript for tasks like streaming data.
Web Based Workforce Training Presentationlstansbury
This document discusses the use of eLearning and web-based workforce training. It notes that eLearning can reduce costs and increase convenience for training employees. However, some studies have found that outcomes may be negatively impacted if the training is not properly adapted to the online medium. The document also provides local examples of companies and organizations in Louisiana that use eLearning for mandatory training and continuing education. It estimates that training costs average around $1,000 per employee when utilizing eLearning.
The document discusses PHP concepts like syntax, data types, variables, arrays, operators, loops, functions, object-oriented programming, classes and methods. It provides code examples for filtering bad words in a string, calculating the sum of digits in an array, and creating a Society class with methods to set and get its name. Real-world uses of PHP concepts are demonstrated, including extending the Society class to output its name when cast to a string.
Why Renting Isn't Throwing Money Away | Scott DilloffScott Dilloff
Scott Dilloff, CEO, presents the myriad of reasons why renting is an often misrepresented alternative to purchasing property. Learn more at http://scottdilloff.net/
The document describes a student PHP meetup group at the University of Edinburgh called EdiPHP. The group meets weekly to learn about PHP and web development topics like databases, frameworks and advanced techniques. The introductory meetup provides an overview of the group and introduces HTML and how PHP can make HTML dynamic by processing PHP code on the server. Attendees are encouraged to follow the group on social media and attend future meetups to learn more.
This document provides tasks to practice PHP skills like defining functions, classes, and methods. Task 1 involves defining a function to convert a string to "lolspeak". Task 2 defines a Lolcat class with properties like name and image URL along with getters and setters. Task 3 adds methods to the Lolcat class to output its HTML representation with the image and caption.
The document discusses the benefits of meditation for reducing stress and anxiety. Regular meditation practice can help calm the mind and body by lowering heart rate and blood pressure. Studies have shown that meditating for just 10-20 minutes per day can have significant positive impacts on both mental and physical health over time.
The document discusses using technology in education, including connecting with classmates at home, challenges faced by teachers, the school principal learning about the situation, benefits of technology, a decision to change, and final reflections. It covers topics like remote learning, online teaching tools, and how technology can impact education.
The document discusses five factors that can increase luck:
1. Clarity - Knowing exactly what you want through clear vision and goal setting.
2. Activity - Developing a bias for action and taking initiative through urgency and self-reliance.
3. Mastery - Improving your skills and performance, as better skills lead to more opportunities.
4. Energy - Working harder than others through longer hours and sustained effort to get more done and noticed.
5. Honesty - Being trustworthy with clients and having integrity in how you see yourself and your situation.
Obesity can be caused by a lack of physical activity and poor nutrition, and increases risks for heart disease, high cholesterol, and diabetes. To combat obesity, one should eat healthy foods, engage in regular exercise, and stay physically active by spending less time on electronics and more time with friends doing active hobbies like tennis. Additionally, teens consume too many soft drinks each year and are more overweight now than previous generations due to less activity and more unhealthy eating.
The document discusses a PHP meetup for students that will include a workshop on building forms using PHP. The workshop project will involve creating classes to generate and validate forms, as well as a page with a form where valid submitted data is sent by email. Tasks for the meetup are available online.
This document provides instructions for creating an automated system for ordering personalized lolcat pictures. The system will include a form to choose a cat category, mood, and caption description, and submit the order. Orders will be stored in a database with tables for categories, moods, and orders. Learners are tasked with setting up the database tables, creating classes to interact with the database, generating options for the form, and submitting valid orders to the database. The goal is to automate the process of taking picture orders to reduce time spent by the artist.
FIT$BUSINESS: Cisco Channel Partners helpen een Cisco partner te worden, te blijven of zelfs te helpen een hogere status te bemachtigen – van Select tot Gold Partner Status
This document appears to show historical development patterns from 1870 to 2007 in the United States, with the y-axis representing some cumulative measurement (possibly acres or population) growing over time in decadal increments, and the timber industry declining from its peak between 1930-1949 to recent years between 1990-1999.
This document provides an abstract for a presentation on the interpretation of the shared past within the World Heritage Site of Goreme, Cappadocia. The presentation would examine how the Byzantine Christian history of the site has become the dominant narrative interpreted for tourists, emphasizing its legitimacy as a Christian site. However, this silences other narratives and expects it to be experienced as a place of pilgrimage. The presentation would explore religious tensions in the site's interpretation and management from the perspectives of Islamic local guides and residents, as well as cultural tourists and pilgrims. It would also consider management issues that impact the visitor experience and long-term care of the site.
La encuesta explora las actitudes y comportamientos de los estudiantes con respecto a los rumores y el hablar mal de otros. Algunos estudiantes admiten haber hablado mal de compañeros, aunque la mayoría dice que nunca lo hace. Cuando se transmiten rumores, la forma más común es de forma oral. Algunos estudiantes transmiten los rumores sin verificarlos, mientras que otros intentan confirmar la veracidad de la información antes de propagarla.
PHP supports both procedural and object-oriented programming. The document discusses the differences between PHP 4 and PHP 5, with PHP 5 introducing substantial improvements to PHP's object model. It then outlines 22 steps for developing an object-oriented PHP application, covering key OOP concepts like classes, objects, properties, methods, constructors, access modifiers, inheritance, and method overriding.
The document discusses object oriented concepts in PHP. It provides 22 steps for developing an application using object oriented principles in PHP. Some key points covered include:
- Creating PHP classes to organize code into reusable blueprints
- Defining properties and methods within classes
- Instantiating objects from classes and accessing object properties and methods
- Using constructors to initialize properties when objects are created
- Implementing getter and setter methods to encapsulate property access
- Applying access modifiers like public, private, and protected to restrict property and method access
The steps provide a guide for designing classes, creating objects, setting and getting property values, and controlling access to properties and methods through access modifiers. This allows for developing PHP applications
This document discusses object oriented concepts in PHP. It provides a 22 step process for developing an application using object oriented programming principles in PHP. Some of the key steps include creating a PHP class, adding properties and methods to the class, instantiating objects from the class, setting and getting property values using methods, using access modifiers like public, private and protected, and creating a constructor method. The document provides examples of coding classes, objects, properties, methods and using various OOP concepts in PHP.
A quick run through explaining actions and filters that are used throughout WordPress (with useful metaphors) and some examples. It is intended to demonstrate that actions and filters are not as scary as people might think and that they can very easily make significant changes with only a few lines of code.
This document provides guidance on a programming primer for encapsulation and abstraction using VB in ASP.NET. It discusses creating an Employee class with private member variables for ID and salary, along with public properties to access these privately. The example shows how to set property values and output them, demonstrating encapsulation. It also explains how abstraction relates to classes representing conceptual models without physical form. The document concludes with exercises on using different access modifiers like private, public, and protected.
The document discusses object-oriented programming (OOP) principles and design patterns in PHP, explaining key OOP concepts like encapsulation, inheritance, and polymorphism. Several common design patterns are described, including singleton, factory, observer, and proxy patterns, and how they can help solve recurring problems by promoting code reuse. The document provides examples of applying these patterns in PHP code to handle issues like object aggregation, iteration, and dynamic method dispatching.
Paying off technical debt with PHPSpecLewis Wright
This document discusses using PHPSpec to help manage technical debt in PHP code. It explains that technical debt occurs when code complexity increases without refactoring. PHPSpec can help pay off technical debt through specifying behavior examples to guide refactoring. It provides examples of writing PHPSpec specifications that describe class behavior and interactions with other objects. The document argues that specifying code behavior through PHPSpec enables technical debt to be managed and code redesigned with confidence.
In 2010, I told everyone how to start unit testing Zend Framework applications. In 2011, let’s take this a step further by testing services, work flows and performance. Looking to raise the bar on quality? Let this talk be the push you need to improve your Zend Framework projects.
This document discusses object-oriented programming in PHP (OOPHP). It defines OOP and procedural programming, explaining that OOP involves creating objects that contain both data and functions. The document then provides an example of defining a class in PHP with properties and methods. It demonstrates how to instantiate objects from classes, access object properties and methods, and use inheritance, constructors, and destructors in OOPHP. Finally, it outlines how to implement the model-view-controller pattern in OOPHP using classes to represent the model, view, and controller components.
The document discusses PHP classes and objects. It defines key concepts like classes, objects, properties, and methods. It provides examples of creating a basic PHP class, adding properties and methods to classes, creating objects from classes, and accessing object properties and methods. The document also covers inheritance, overriding methods, magic methods like __get(), __set(), and __call(), serializing objects to strings, and the __sleep() and __wakeup() methods.
Mike Toppa gave a presentation on dependency injection in PHP. He discussed classes and objects in PHP, the SOLID principles including the single responsibility principle and dependency inversion principle. He explained class autoloading in PHP and different techniques for dependency injection including constructor injection, setter injection, and using a dependency injection container.
This document discusses refactoring a Magento module to improve its structure and design. It begins with an email sending command class that contains all the logic in one method, making it difficult to understand, test, and change. The document then shows how to break the class into separate models and commands to improve cohesion, loosen coupling, and follow SOLID principles. It introduces interfaces, dependency injection, and the benefits of programming to abstractions rather than concretions. The refactored code is more maintainable, extensible, and allows changing implementations more easily through configuration rather than code changes.
Abstraction, Encapsulation, Polymorphism, and Interfaces: whether you’ve been programming in PHP for years or are just starting your journey, these terms can be overwhelming even on a good day. Variables, conditionals, those all make sense. But this whole Object-Oriented thing is WAY more complicated. Not only that, people that already understand it act like it’s so easy and they talk right over the simple questions and never explain the basic concepts in a way that actually makes sense. In this session we’ll take you through real life examples of Object-Oriented terminology in a way that will make sense of all the mumbo jumbo and allow you to utilizing OOP immediately.
This document provides an introduction to object oriented PHP by explaining key concepts like encapsulation, inheritance, polymorphism, and abstraction. It defines classes, objects, properties, methods, and constructs. Examples are provided to demonstrate how to define classes, instantiate objects, set properties, create and extend classes, implement interfaces and abstract classes, and override methods.
The document discusses object oriented concepts in PHP. Some key points:
- PHP 5 introduced a complete object oriented programming model, allowing PHP programmers to code like Java and C#.
- Object oriented programming in PHP revolves around classes, which act as templates to define objects. Classes contain properties (variables) and methods (functions).
- The document provides a step-by-step process for developing an object oriented PHP application, including creating classes, instantiating objects from classes, setting and getting object properties and methods, and restricting access using modifiers.
WordPress Structure and Best Practicesmarkparolisi
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Follow us on LinkedIn: https://in.linkedin.com/company/mydbops
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1. Task Sheet 02
EdiPHP
Students PHP Meetup
November 11, 2009
This is the second task sheet of EdiPHP. If you’re stuck on the tasks, or find a mistake in them, or simply
want to have a chat, feel free to contact us via our Facebook group or Twitter account.
1 Introduction
In this task, we will extend our previous task - creating a lolcat, by creating a form, where user could
specify lolcats’ name, image and caption and our script will generate it. So, our form will have these
fields:
1. Name
2. Image URL
3. Caption
4. Submit Button
Our fields should be validated this way:
• Name must be at least 5 characters long, but no longer than 20 characters long,
• Image URL must be a image url (end with .jpg), and not empty (at least 1 character long),
• Caption must be at least 10 characters long, but no longer than 100 characters long.
You can look here to see how it should work: http://bit.ly/EdiPHPTask2Solved
1
2. 2 Task 1 - Create an abstract class for form field
Open file FormField.php. You should see this header of the class FormField there:
abstract class FormField {
private $_name;
private $_value;
private $_title;
private $_minLength;
private $_maxLength;
public function __construct($name, $title = null, $value = null,
$minLength = 0, $maxLength = -1);
public function setName($name);
public function getName();
public function setValue($value);
public function getValue();
public function setTitle($title);
public function getTitle();
public function setMinLength($minLength);
public function getMinLength();
public function setMaxLength($maxLength);
public function getMaxLength();
public abstract function __toString();
public function isValid();
}
This is only representation of function interface, you will need to write the functions yourself. The private
variables $_name, $_value, $_title, $_minLength, $_maxLength represent name, value, title, minimal
and maximal length of input in a form field, respectively.
2
3. 2.1 Implement these functions:
1. Setters and getters:
• setName($name) and getName() - that set and get $_name (respectively);
• setValue($value) and getValue() - that set and get $_value;
• setTitle($title) and getTitle() - that set and get $_title;
• setMinLength($minLength) and getMinLength() - that set and get $_minLength;
• setMaxLength($maxLength) and getMaxLength() - that set and get $_maxLength.
Note that the behaviour of these functions is quite self-explanatory, so I won’t talk about it in detail
in future tasks.
2. __construct($name, ..., $maxLength = -1) Note: I skip some parameters here, please check
with the header above. This function sets $name, $title, ..., $maxLength (as specified in declara-
tion) thus constructs the class.
3. isValid() This function should return true if ((length of value is greater than or equal the minimal
length) and (less than or equal the maximal length or maximal length is less than zero)). Note: I
added parentheses for clarity.
Leave __toString() as it is.
To check your implementation, you can run tests/FormFieldTest.php and check whether all of tests are
OK. The test file is formatted to be run from console.
2.2 Example
To implement setName($name) function, you will have to replace this line:
public function setName($name);
to your implementation of setName($name) function. So it would now look like:
public function setName($name) {
$this->_name = $name;
return $this;
}
3
4. 3 Task 2 - Implement a class, that represents a text input field
We have already created a class that represents a form field. However, a form field can be a lot of different
things: <input> field, <textarea> field, <select> field, etc. Which one is our FormField? Well it is,
actually all of them. However, we will need to print it. So we’ll have to be a bit more specific about that.
Open file TextInput.php. Note, that it requires file FormField.php, where our FormField class is defined.
Here you see an interface for our new class TextInput which extends our FormField by making it an
<input type="text"> field. Note that this class has only one function - __toString(). This means
that it inherits every function from class FormField, except the __toString() function, which is defined
there.
3.1 Implementing a function
Implement a function __toString() function should return the following:
<strong>!!title!!</strong>: <input type="text" name="!!name!!" value="!!value!!" />
Where !!title!!, !!name!!, !!value!! are title, name and value of the field.
Important note: don’t forget to escape the value with htmlspecialchars(), using the quote style
ENT_QUOTES, when outputting it. If you forget to do this, this may become a serious security issue.
3.2 Example
$foobar = new TextInput(’foobar’, ’A bar of foo’, ’bar>foo’);
echo $foobar;
This code should return:
<strong>A bar of foo</strong>: <input type="text" name="foobar" value="bar>foo" />
Also, you can check your solution with the tests/TextInputTest.php.
4 Task 3 - Implement a class, that represents an image input
field
Now we have two classes: one that represents a form field, the other that represents an input field. These
pretty much cover form fields for Name and Caption. As they both are input fields.
On the other hand, despite the fact our image URL field, is an input field, it is not an object of our class
TextInput, because we have to validate it differentely.
Open ImageUrl.php. You’ll see that it requires TextInput.php. You will also see that our new class
ImageUrl extends TextInput so it inherits everything from it (even the __toString() method we wrote
in previous task).
4
5. 4.1 Implementing validation
We’ll now implement validation for image URL. This is how the isValid() should work:
1. Call parent’s validator, and check whether everything is OK there.
Parent’s validator can be called like this: parent::isValid()
Your function should return false, if parent’s validator returns false.
2. Validate image extension to be .jpg. This means that the value of field must have this extension.
Please consult PHP documentation on how to do that: http://uk3.php.net/pathinfo. kc8yds at
gmail dot com’s note there could be helpful.
4.2 Example
$a = new ImageUrl(’’, null, ’http://lolcat.com/cat.jpg’);
$b = new ImageUrl(’’, null, ’http://aaa.com/blah.txt’);
$c = new ImageUrl(’’, null, ’http://pngImages.com/img.png’);
echo $a->isValid() ? "True" : "False";
echo PHP_EOL;
echo $b->isValid() ? "True" : "False";
echo PHP_EOL;
echo $c->isValid() ? "True" : "False";
echo PHP_EOL;
Notes: The ternary operator: $a ? $b : $c returns $b if $a is true, or $c otherwise. PHP_EOL is a
constant that represents newline symbol.
The snippet above returns:
True
False
False
Note, that third one is false because we assume that only .jpg is a valid image. Feel free to extend this
validation to accept other types, if you want.
You can check your solution running an appropriate test in tests/ folder.
5 Task 4 - Implement a class for submit button
This task is very similar to Task 2. Open file SubmitButton.php. You will see that our class SubmitButton
is similar to TextInput class. Go ahead and implement __toString() method for SubmitButton class,
which should return:
5
6. <input type="submit" value="!!title!!" />
Where !!title!! is the title (not the value) of the element.
6 Task 5 - Implement a class for form
Now we will implement a class that wraps together everything we already implemented into a form object.
Open file Form.php. You will see the declaration for form’s interface there.
We have only one private variable there $_fields - an array that keeps all of our form fields in it.
Go ahead and implement a getFields() method. You know how.
6.1 Implementation of addField()
Now we will implement addField(FormField $field). This function takes an object of FormField
family (an object that inherits FormField) as a formal parameter. Then it adds the object to $_field
array so the object’s name becomes a key, and the object itself becomes a value in it. Such that the
following code:
$t = new TextInput(’test’);
$f = new Form ();
$f->addField($t);
print_r($f->getFields());
Prints out:
Array
(
[test] => TextInput Object
(
[_name:FormField:private] => test
[_value:FormField:private] =>
[_title:FormField:private] =>
[_minLength:FormField:private] => 0
[_maxLength:FormField:private] => -1
)
)
6
7. 6.2 Implementation of isValid()
As we now implemented a way to add and return fields, we can start working with them. First, we’re
going to implement a function that returns true if the form is valid. And the form is valid iff all of its
fields are valid. So, write a function isValid() to check this property.
6.3 Implementation of populate()
Now we need to find a way to populate our form with new data in a comfortable way. That is what our
function populate($data) is going to do.
The populate($data) function takes post data array ($_POST) as a formal parameter, and populates
all of it’s fields with the data in it. $_POST data array consists of $name => $value pairs of input. Our
populate($data) method should assign values in $data to our form fields for each of these pairs, where
$name is the field name and $value is the field value.
Example:
$array = array(’foo’ => ’bar’);
$fo = new Form();
$fo->addField(new TextInput(’foo’))
->populate($array);
$fields = $fo->getFields();
echo $fields[’foo’]->getValue();
Prints out ”bar”.
6.4 Implementation of getValues()
It would also be handy to have a reverse function of populate: a function that returns an array of
similar structure to the $_POST ($name => $value) from our field object data. Implement this function.
Example: this line, appended to previous example: $fo->getValues() would return $array.
6.5 Implementation of toString()
We’re almost done with this class. Now let’s just implement a __toString() method for the form.
__toString() should return this:
<form action="" method="post">
!!Field1 Str!!
!!Field2 Str!!
...
!!FieldN Str!!
</form>
7
8. Where, obviously, !!FieldX Str!! is a string representation (output of __toString()) of the form fields
in the form.
Check your solution with appropriate test in tests/
7 Connecting everything
Hooray! We finished creating the objects for our form. Now let’s actually build them into one, working
HTML page. Please note, that file LolCat.php contains my implementation of class LolCat, which was
our previous task. We’re going to use it here. Feel free to change it to your implementation of the class,
if you want.
Open index.php. You’ll see some HTML already pre-written to you. Tell PHP, that you need files
Form.php and LolCat.php in this page, by adding require "Form.php"; and require "LolCat.php"
on top of all PHP code.
Now create a Form object, call the variable $form. You should know how to do that, by looking at the
examples in this document. Add the fields to the form. You can find those at the very beginning of the
document. Think about which class should you use for each of them, and how to construct them.
Note: Use null for empty value.
Now add echo $form; somewhere between <body> and </body>. Don’t forget that this must be between
PHP tags (<?php and ?>). Browse to your index.php via http://localhost/ (you will need to set up
web server there first, see previous task for further details). And gaze at your created form. Though,
you’re not able to submit it yet.
That is why because we did not implement $_POST variable handling anywhere. To implement $_POST
variable handling we first need to check whether we have a form submitted. This is as easy as this:
if ($_POST)
{
//Form was submitted
}
else
{
//It was not submitted
}
If the form was not submitted, we print empty form (echo $form;).
If the form was submitted we have to populate (function populate()) our form with the $_POST data
and check whether this, populated data is valid.
If the data was not valid, we print error and the populated form.
If the data was valid, we create object $lolcat which is a new LolCat($name, $imageUrl, $caption),
where the constructor values, are, of course, the values submitted by the user in the form. And print the
lolcat, as well as the populated form.
.. And we’re done! Implement this and play with the lolcats.
8
9. 8 Conclusion
We spent a great effort on writing this form. There are quicker to write solutions for making forms like
this. However, representing forms as objects is a easily reusable and manageable solution which is used
by many frameworks and is considered a good style of writing your code. This means that it is easy to
add another field to a form, or create a completely different form with the classes we have so far, if we
need to, isn’t it?
So, stay tuned for more PHP,
EdiPHP
P.S. This is officially the longest document with code snippets in it I have ever written. And it is all
L TEXpowered! Awesome! :)
A
9