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class_alias

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

class_alias — Creates an alias for a class

Descrizione

class_alias(string $class, string $alias, bool $autoload = true): bool

Creates an alias named alias based on the user defined class class. The aliased class is exactly the same as the original class.

The class alias cannot be any of the PHP reserved words.

Nota: As of PHP 8.3.0, class_alias() also supports creating an alias of a PHP internal class.

Elenco dei parametri

class

The original class.

alias

The alias name for the class.

autoload

Whether to autoload if the original class is not found.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Log delle modifiche

Versione Descrizione
8.3.0 class_alias() now supports creating an alias of an internal class.

Esempi

Example #1 class_alias() example

<?php

class Foo { }

class_alias('Foo', 'Bar');

$a = new Foo;
$b = new Bar;

// the objects are the same
var_dump($a == $b, $a === $b);
var_dump($a instanceof $b);

// the classes are the same
var_dump($a instanceof Foo);
var_dump($a instanceof Bar);

var_dump($b instanceof Foo);
var_dump($b instanceof Bar);

?>

Il precedente esempio visualizzerà:

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

Note

Nota:

Class names are case-insensitive in PHP, and this is reflected in this function. Aliases created by class_alias() are declared in lowercase. This means that for a class MyClass, the class_alias('MyClass', 'MyClassAlias') call will declare a new class alias named myclassalias.

Vedere anche: