หนูขมเข็มในมหาสมุทรมา 2 วันแล้วค่ะ ปัญหาอยู่ที่ไม่สามารถ insert ข้อมูล order_id ลงฐานข้อมูลได้คะ

@session_start("login_true_mem"); 
include "../ConnectionDb.php"; 
$str_sql1 ="SELECT MAX(order_id ) AS now_id FROM orders "; 
mysql_query("SET NAMES tis620");  
$result1=mysql_query($str_sql1);
$rs1=mysql_fetch_array($result1);
$order_id =$rs1['now_id'];
$s="SIR";
$text = $order_id;
$a = explode("/",$text);
$t1 = $a[0];
$count=substr($t1,-3);
$now_id = str_pad($count+1,3,'0',STR_PAD_LEFT);

?>

<?

include "../ConnectionDb.php";
$ToDay = date( "Y-m-d" );
$year = date( "Y" );
$sql1 = "insert into orders (order_id, login_true_mem,order_date,year) ";
$sql1 = $sql1 . "VALUES ('".$_POST[order_id]."', '$login_true_mem','$ToDay','$year')";
$rs1 = mysql_query( $sql1);


for ( $basket_counter=0; $basket_counter<$ses_basket_items; $basket_counter++ )
	{
		$pd_price = $ses_basket_price[$basket_counter];
		$quantity = $ses_basket_amount[$basket_counter];
		$pd_id = $ses_basket_id[$basket_counter];
		$bd_name = $ses_basket_name[$basket_counter];
		$amount = $quantity*$book_price;
		$total += $amount;

		if ( $quantity > 0 )
			{
				$sql="insert into orders_enroll  (order_id,pd_id,pd_price,quantity)  VALUES ('".$_POST[order_id]."','$pd_id','$pd_price', '$quantity')";

$result=mysql_query($sql) or die ("ไม่สามารถเบิกสินค้าได้");
		}
	}

$ses_basket_items = 0;
unset( $ses_basket_name );
unset( $ses_basket_amount );
unset( $ses_basket_price );
unset( $ses_basket_id );
?>