To load objects automatically:
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 at the beginning of each script (one file per class).
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.
This example attempts to load the MyClass1 and MyClass2 classes from the myclass1.php and myclass2.php files, respectively.
function __autoload ($class _name) {
Require_once $class _name. '. php ';
}
$obj = new MyClass1 ();
$obj 2 = new MyClass2 ();
Attention:
Exceptions thrown in the __autoload function cannot be caught by a catch statement block and cause a fatal error.
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