what is php5

In July 2004, the release of the official version of PHP5 marked the arrival of a new PHP era. At its core is the second-generation Zend engine, which introduces support for the new PECL module.

Although PHP4 is developing so rapidly, it still lacks some key features compared to other popular development languages. Features, for example, the object-oriented function in PHP4 is not perfect, and it cannot capture and handle exceptions. Therefore, we are still stretched in dealing with some special issues. (Recommended learning:PHP video tutorial)

The biggest feature of PHP5 is the introduction of all object-oriented mechanisms and retains downward compatibility. Programmers no longer have to write classes that lack functionality and can implement class protection in a variety of ways.

In addition, there are no longer problems in object integration and other aspects. Using PHP5 introduces type hints and exception handling mechanisms, which can handle and avoid errors more effectively.

While being continuously updated, PHP5 still retains the ability to run old PHP4 programs on the PHP5 platform

without major problems. With the development of MySQL database, PHP5 is also bundled with the new MySQLi extension module, which provides some more effective methods and practical tools for handling database operations. Most of these methods are implemented in an object-oriented manner, and they also greatly improve the execution speed of database-based Web projects.

In addition, PHP5 has also improved the function of creating dynamic pictures and can support multiple picture formats (such as PNG, GIF, TTIF, JPGE, etc.).

PHP5 has built-in support for the GD2 library, so it is no longer difficult to install the GD2 library (mainly in UNIX systems), which makes processing images very simple and efficient.

Most web program developers still use XML as a completely simple database. PHP5 also uses a series of simple, easy-to-use, and powerful methods to process XML documents.

Today, millions of websites, including Yahoo and Amazon, as well as numerous developers and programming enthusiasts are using PHP.

From the initial PHP/FI to PHP5, PHP has developed extremely rapidly, and its future development prospects must also be eye-catching.

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