public function insert($table,$data){
$this->setAttribute(pdo::ATTR_EMULATE_PREPARES,false);
ksort($data);
$keyfild='`'.implode('`,`',array_keys($data)).'`';
$valfild=':'.implode(',:',array_keys($data));
$res=$this->prepare("INSERT INTO `$table` ($keyfild) VALUES ($valfild)");

foreach($data as $key=>$val){
$res->bindValue(":$key",$val);
}
$rr=$res->execute();
if($rr){
session::set('insert',true_matn);
}else{
session::set('insert',false_matn);
}
}