Creates an alias for a class
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    class_alias

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

    class_alias — Creates an alias for a class

    Description

    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.

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

    Parameters

    class

    The original class.

    alias

    The alias name for the class.

    autoload

    Whether to autoload if the original class is not found.

    Return Values

    Returns true on success or false on failure.

    Changelog

    Version Description
    8.3.0 class_alias() now supports creating an alias of an internal class.

    Examples

    Example #1 class_alias() example

    <?phpclass Foo { }class_alias('Foo', 'Bar');$a = new Foo;$b = new Bar;// the objects are the samevar_dump($a == $b, $a === $b);var_dump($a instanceof $b);// the classes are the samevar_dump($a instanceof Foo);var_dump($a instanceof Bar);var_dump($b instanceof Foo);var_dump($b instanceof Bar);?>

    The above example will output:

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

    Notes

    Note:

    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.

    See Also