Convert date to date in php_PHP tutorial

php 日期转换成日时截

private function toTimeStamp ($dateTimeString = NULL) {
  if (!$dateTimeString) {
   $dateTimeString = time();
  }
  $numeric = '';
  $add_space = false;
  for($i=0;$i   if(strpos('0123456789',$dateTimeString[$i])===false) {
    if($add_space) {
     $numeric .= ' ';
     $add_space = false;
    }
   } else {
    $numeric .= $dateTimeString[$i];
    $add_space = true;
   }
  }
  
  $numeric_array = explode(' ',$numeric,6);
  if(sizeof($numeric_array)<3 || ($numeric_array[0]==0 && $numeric_array[1]==0 && $numeric_array[2]==0)) {
   throw new Exception($dateTimeString . ' is an invalid parameter', 5);
  } else {
   $result = mktime(intval($numeric_array[3]), intval($numeric_array[4]), intval($numeric_array[5]),
        intval($numeric_array[1]), intval($numeric_array[2]), intval($numeric_array[0])) ;
  }
  
  return $result;
 
 }