PHP functions: method_exists and function_exists_PHP tutorial

PHP functions: method_exists and function_exists. Method_exists check whether the method of the class has bool (,) check whether the method of the class exists in the specified object. parameter: object example or class name method_name: method name return value method_exists

Check whether the class method exists

 bool  (   ,   )

Check whether the class method exists in the specified object.

Parameters:

Object: object example or class name

Method_name: method name

Return value:

If the method referred to by method_name has been defined in the object class referred to by the object, TRUE is returned; otherwise, FALSE is returned.

Note:

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

Function_exists

Returns TRUE if the provided method has been defined.

 bool  (   )

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

Parameters:

Method name, string type.

Return value:

If the method name exists and is a method, TRUE is returned; otherwise, FALSE is returned.

Note:

This function will returnFALSEFor constructs, such as include_once and echo.

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