问将mysql上的时间节省为数据

EN

protected function commenting_date_time(){
     $timestamp=time();
     return strftime("%m/ %d/ %y at %H:%M %p", $timestamp);
 }

public function create_comment(){

    global $database;

        $author=$_POST["author"];
    $created= $this-> Commenting_date_time();
    $bidy= $_POST["bidy"];

    $query= "INSERT INTO comment (";
    $query.=" author, created, bidy ";
    $query.=" ) VALUES ( ";
    $query.=" '{$author}', '{$created}', '{$bidy}'";
    $query.= " )";
    $insert_query=mysqli_query($database-> connection, $query);
    $database-> ensure($insert_query);
    return $insert_query;
}