ช่วยดูไห้ทีครับ พอกด id and password แล้วมันบอกผิด พลาดตลอดเลย ผมจะทำ add emailเข้า mysql

Code (C#)


<?php
	@header ('Content-type: text/html; charset=utf-8');
	include('client_setting.php');
	$connect = mssql_connect( $dbhost,$dbusername,$dbpassword);
	if ( !$connect ) { echo "ติดต่อกับฐานข้อมูล Mssql ไม่ได้ "; exit(); }
	$condb = mssql_select_db($db);
if($_POST[input] = "input"){

		$id	= addslashes($_POST[username]);
		$password = addslashes($_POST[password]);
		$email = addslashes($_POST[email]); 
		$re_email = addslashes($_POST[re_email]);
		$sql = "select email from game_acc where account='$id' and password ='$password'" ;

	if	($objQuery = mssql_query($sql)==1){
		$objEmail = mssql_fetch_object($objQuery);
		if(strnatcasecmp ( $objEmail->email, null)==0){
			if(strcmp ( "$email", "$re_email" )==0){
				$sql = "update $login_table set email = '$email' where account = '$id' and password ='$password'";
				if (mssql_query($sql)) {
					echo		"<script>alert('add email complete ');</script>";
					echo '<meta http-equiv="refresh" content="0;URL=./">';	
				} else {
					echo "<script>alert('Error Please enter the back buttom to word data again');</script>";
					echo '<meta http-equiv="refresh" content="0;URL=./">';
				}
			}else{
				echo "<script>alert('email and re-email not match press back button to word data again');</script>";
				echo '<meta http-equiv="refresh" content="0;URL=./">';
			}
		}else{
		echo "<script>alert('this username can't add email ');</script>";
		}
	}else{
		echo "<script>alert('username or password wrong');</script>";
	}
}
?>