PHP Magic method call

__call is one of the magic methods that calls the __call method when a program calls a method that is not declared in the current class or that does not have permission to call it

Class test{public  function Emptyfunc () {    $getArgs = Func_get_args ();    $funcName = $getArgs [0];    $params = Array_slice ($getArgs, 1);    Var_dump ($params);  This is the params                    return $funcName. ' function is not exists ';  }  Public Function __call ($m, $params)  {     $arr [] = $m;     $arr = Array_merge ($arr, $params);     return Call_user_func_array (Array ($this, ' Emptyfunc '), $arr);  }  protected function Nowtotest () {    return ' this is Nowtotest ';  }} $TESTOBJ = new test (); Var_dump ($testObj->nowtotest (' params1 ', ' params1 '));//var_dump result = string (29) " Nowtotest function is NOT exists "

As in the test class, the Nowtotest method is present, but the method is protected (protection), so the instance of the object does not have permission to execute, then ran to the __call.

_call () has 2 parameters, the first $m is the name of the current calling method, here is ' nowtotest ', and the second $params is the parameter passed in when the ' Nowtotest ' method is called. In the form of an array in $params.

Call_user_func_array ($method, $params) The function of this PHP method is to invoke the $method method, the parameter is $params, if the method is in the class, it is called on the array form above, The Emptyfunc method is called here. The function of Func_get_args () is to get all the parameters passed in as an array. When these parameters are passed in __call, the first parameter is the method name. So the result of the final return is

"Nowtotest function is not exists"

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