PHP class_alias() function usage and example

PHP Class/Object function reference manual

The class_alias() function creates an alias for a class

Syntax

class_alias(string $original, string $alias[, bool $autoload = TRUE]);

Definition and usage

　Create an alias alias based on the user-defined class original. This alias class is completely the same as the original class.

Parameter

Return value

Returns TRUE on success, or FALSE on failure.

Online example

The following is the usage of this function-

<?php
class foo { }
class_alias('foo', 'bar');
$a = new foo;
$b = new bar;
//Whether the objects are the same
var_dump($a == $b, $a === $b);
var_dump($a instanceof $b);
//Whether the class is the same
var_dump($a instanceof foo);
var_dump($a instanceof bar);
var_dump($b instanceof foo);
var_dump($b instanceof bar);
?>

Output result:

bool(true)
bool(false)
bool(true)
bool(true)
bool(true)
bool(true)
bool(true)

PHP Class/Object function reference manual