PHP functions: method_exists and function_exists_PHP tutorial

method_exists

Check whether the class method exists

<span 1</span> bool <span method_exists</span> ( <span mixed</span> <span $object</span> , <span string</span> <span $method_name</span> )

Check whether the method of the class exists in the specified object

Parameters:

object: object example or class name

method_name: method name

Return value:

If the method pointed by method_name has been defined in the object class pointed by object, return TRUE, otherwise return FALSE.

Note:

If this class is not a known class, using this function will use any registered autoloader.

function_exists

If the provided method has been defined, return TRUE.

<span 1</span> bool <span function_exists</span> ( <span string</span> <span $function_name</span> )

Check the list of defined methods, both built-in (inside PHP) and user-defined.

Parameters:

Method name, string type.

Return value:

When the method name exists and is a method, return TRUE, otherwise return FALSE.

note:

This function will return FALSE for constructs, such as include_once and echo.

http://www.bkjia.com/PHPjc/440152.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/440152.htmlTechArticlemethod_exists Check whether the method of the class exists bool (,) Check whether the method of the class exists in the specified object Parameters: object: object example or class name method_name: method name return value...