PHP Automatic Loading class Usage example analysis, PHP loading example analysis
This example describes the PHP automatic loading class usage. Share to everyone for your reference, as follows:
<?php//function __autoload ($class _name) {// require_once $class _name. '. php ';//}spl_autoload_register ("core", ' autoload '));//When instantiating a class, automatically call the AutoLoad () method in the core class to load the class///You can also use __ AutoLoad (), but the new version of PHP is recommended to use Spl_autoload_register, because __autoload () is gradually discarded $obj = new MyClass1 (); $obj 2 = new MyClass2 (); Class core{public static function AutoLoad ($class) { require $class. php '; }}
Understanding ideas is the key:
Automatically load objects
Many developers write object-oriented applications to create a PHP source file for each class definition. A big annoyance is having to write a long list of included files (one file per class) at the beginning of each script.
In PHP 5, this is no longer necessary. You can define a __autoload () function that will be called automatically when you try to use a class that is not already defined. By calling this function, the scripting engine has the last chance to load the required classes before PHP fails.
Tip
Spl_autoload_register () provides a more flexible way to implement automatic loading of classes. Therefore, it is no longer recommended to use the __autoload () function, which may be deprecated in later versions.
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I hope this article is helpful to you in PHP programming.
http://www.bkjia.com/PHPjc/1138983.html www.bkjia.com true http://www.bkjia.com/PHPjc/1138983.html techarticle PHP Automatic Loading class Usage example analysis, PHP loading example Analysis This article describes the PHP automatic loading class usage. Share to everyone for your reference, specifically as follows: Php//function __autolo ...