by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

It is useful to verify that all fields are NULL in MYSQL to query data from a database so they can be treated differently from fields with numeric values ​​or text. NULL indicates an unknown value, which is different from a default value, such as 0 or ' '. You can use the PHP function "is_null" to tell if a returned MYSQL field is NULL or not.



 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

The word "code" has two meanings in operation of computers. The first one is Number or Symbol that representing another meaning. An example of this type of code is "301", which is a code specified in the HTTP to signify. The 301 redirect is the most effective way for you to change the content of a page or site to another without losing the PageRank of the page and the domain that migration. Discover all you need to know to migrate page or domain without losing position in Google. The other meaning of "code" in computing is "programming code" a "permanent redirection". PHP is a programming language for web pages. You can use the PHP code to create a redirect. Redirection redirect or forwards visitors to a web address to another Web address, usually because the original page changed its address. The user is automatically forwarded to the new page location, and usually do not even notice that the address on the top of the browser has changed.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

In this Tutorial, you will create your first object, which will be an instance of a physical address class. As you will be building your examples using this class, you will want to save it as you progress.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

Object-oriented programming allows you to organize a large project into manageable pieces. In comparison, procedural programming is a set of instructions, step by step, that the computer must follow.



 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

Object: In computer science a primitive data type is a basic type of data provided by programming language. Some examples of primitive data types in PHP include Booleans, which are a logical data type containing true or false; floating-point numbers, also known as floats, which are numeric data type that have fractional values--examples include 36.2 and -25; integers are a numeric data type that hold a whole number without any fractions--examples include -6 and 42; and strings, which contain a sequence of characters such as "ecomputernotes.com." With that in mind, an object is a complex data structure along with attributes and behaviors.



 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

As you all know, any PHP script must be surrounded by specific tags. They allow the interpreter to know where in the file is PHP code to execute. On ecomputernotes.com, all presented scripts use the <? Php and ?>; and it is not by chance ...

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

A password is an extremely sensitive and given coveted by pirates, irrespective of the application that uses it. When the password becomes known to a third person, then the latter can for example take ownership of rights in an application and compromise its normal operation.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

In most professional developments, it is necessary to know proper structure of their application in order to facilitate its design and maintenance. The "design patterns", is one of the best solutions to this problem. With the new model object-oriented PHP 5 similar to that of Java, the implementation of design patterns is facilitated. This tutorial focuses on the presentation and implementation of the Singleton pattern, especially used in web applications.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

The conditional structure "foreach" when you allowed to browse the contents of a table. With version 5 of PHP, you can now browse an entire object to retrieve its properties.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

The exception mechanism was introduced in version PHP 5 in addition to its new object-oriented model. Just as in Java, C ++, ActionScript 3, or Visual Basic (to name only these programming languages), exceptions to simplify, personalize and organize the management "errors" in a computer program. Here the word "errors" does not mean "bug", which is an abnormal behavior of the developed application, but "exceptional cases" to treat differently in the program sequence. Let us therefore how the exceptions.



 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

PHP integrates another concept of object-oriented programming: abstract classes. This course defines and introduces the concept of abstract classes. We will present what abstract classes, what they are used for development and how to declare and use them. Finally, we will study the particular case of final classes and methods involved in the security of the code object oriented programming.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

We studied in previous articles the magiques__clone () methods, __set (), __get () and __call (). PHP adds to recent two additional magic methods __sleep () and __wakeup () that allow overloading the native process of serialization and de-serialization of PHP data. That's what we'll explain in tutorial with some concrete examples and easy to understand.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

PHP since version 5 implements magic methods you can implement in your classes, which will be automatically called by your script. Magic method __clone () is one of these methods. The following tutorial introduces the operation of the magic method __clone () based on simple and concrete examples.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

PHP has made a big step forward in object-oriented programming with version 5. Since this version, it allows to implement methods in predefined behavior by PHP. These methods are called "magic methods" __call () is one of them.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

PHP has made a big step forward in object-oriented programming with version 5. Since this version, it allows to implement methods in predefined behavior by PHP. These methods are called "magic methods", the __set () and __get () are included.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

The visibility of the properties and methods of an object is one of the basic features of object-oriented programming. This tutorial aims to introduce different levels of visibility offered by the object model PHP 5. We will review them one by one through practical examples and we will bring some good practices to adopt when used.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

Object-oriented programming (OOP) was integrated into the PHP version 3 in 1998, including basic class and object supportIn 2000, PHP4 added some functionality, but suffered from its non-intuitive handling of references with objects handled like value types.

Finally, in 2004, PHP5 included an extensive rewrite of object handling with the introduction of Zend Engine 2, featuring a comprehensive feature set and increased performance.

But at that time, the PHP object model was far too brief. We could really talk about object oriented programming. PHP Developers are then examined the issue and improved the object model that, since version 5, has nothing to envy to other objects languages like Java or C++.

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

PHP can manipulate the images for many years and for applying special effects to it, we were often forced to write many lines of code. Since PHP version 5, a new feature has appeared: "imagefilter" to achieve effects with the same quality as designs software.
This function allows you to customize the look of your site and also to achieve a different picture gallery of others.
So we'll see:
• The basics
• The ImageFilter () function
• How to play with some filters?

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

The vast majority of dynamic websites or applications need to reuse parts of identical code in several places of the same page, or in several different pages. This is the case for example libraries of user functions or configuration files. Rather than rewrite each time the code, there are functions (actually language constructs) that can import and execute the code reuse in the page. These are the include () and require ().

 
by Dinesh Thakur Category: PHP (Hypertext Preprocessor)

Since PHP4, we hear a lot about sessions. Many people using PHP still unaware what they are and what they are for. Others, however, do not know how to use it wisely. This tutorial is an approach to theoretical and practical sessions. They will be presented by means of a simple example throughout this course. This is a space site secured by authentication.

 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.