method_exists

(PHP 4, PHP 5, PHP 7)

Checks if the class method exists

bool method_exists ( mixed $object, string $method_name )

Checks if the class method exists in the given object.

Parameters:

object

An object instance or a class name

method_name

The method name

Returns:

Returns TRUE if the method given by method_name has been defined for the given object, FALSE otherwise.

Notes:

Using this function will use any registered autoloaders if the class is not already known.

Examples:

method_exists() example

<?php
$directory = new Directory('.');
var_dump(method_exists($directory,'read'));
?>

The above example will output:

bool(true)

Static method_exists() example

<?php
var_dump(method_exists('Directory','read'));
?>

The above example will output:

bool(true)