$name = 'AppPromoZhongQiu2014ActiveStatusSelector';echo cc_format($name);function cc_format($name){  $temp_array = array();  for($i=0;$i<strlen($name);$i++){    $ascii_code = ord($name[$i]);    if($ascii_code >= 65 && $ascii_code <= 90){      if($i == 0){         $temp_array[] = chr($ascii_code + 32);      }else{        $temp_array[] = '_'.chr($ascii_code + 32);      }    }else{      $temp_array[] = $name[$i];    }  }  return implode('',$temp_array);}