php - Getting value from function and adding outside of for loop -

i have following:

public function go(){             for($x=0;$x<=31;$x++) {                 $this->get_answerrules($x);                 $donetime+=$donetime;             }             echo $gmdate("i:s", $donetime);;         } 

and

public function get_answerrules($x){  ...  ...  ...          if($response = $this->request($data)){             $obj = json_decode($response,true);                  foreach($obj $file) {                         $time += $file['batch_dura'];                 }                 $donetime = $time;                 return $donetime;        }else{}   } 

how value 31 loop cycles , add them together?

right results coming blank.

you not using results of method call:

public function go(){     for($x=0;$x<=31;$x++) {         $this->get_answerrules($x);         $donetime+=$donetime;     }     // below won't work `$gmdate` not in scope of method.     echo $gmdate("i:s", $donetime);; } 

should like:

public function go() {     // initialize variable     $donetime = 0;     for($x = 0; $x <= 31; $x++) {         $donetime += $this->get_answerrules($x);     }     echo $gmdate("i:s", $donetime); }