PHP method_exists () function usage

Method_exists

(PHP 4, PHP 5, PHP 7)

method_exists-Check if the method of the class exists

Description

BOOL Method_exists (mixed $object, string $method _name)

Returns TRUE if the method referred to in method_name is defined in the object class referred to by object, otherwise returns FALSE.

The code is as follows

Copy Code

Class A { Public Function xx () { echo ' xx '; } Public Function yy () { Echo ' yy '; } } $obj = new A (); Var_dump (method_exists ($obj, ' xx ')); Var_dump (method_exists ($obj, ' xx ')); Var_dump (method_exists ($obj, ' xx ')); The test results are true Class A { Public Function xx () { echo ' xx '; } Public Function yy () { Echo ' yy '; } Public Function yy () { Echo ' yy '; } } $obj = new A (); $obj->yy (); $obj->yy ();

The above statement is an error.

Example

code is as follows	copy code
//Get action to run include ($c _path); //Load Controller file $controller = new $c _name ($query); If (isset ($_get[' m ')) {   $method = $_get[' m '];    if ($controller, $method ) { $controller-> $method ();  } } else {  //performs the first function   $controller->index (); }