is it valid?(mysql select statement)

[zgkhoo]

<?php
$result=mysql_query("SELECT * from gptran WHERE UserID='$login'&& CardSerial='$_P0ST[gamecard]'")or die('Query failed: ' . mysql_error());
?>

is it valid?

[trq]

Does it work?

 

It may be a valid query but it is not valid php.

 

<?php

  $result = mysql_query("SELECT * FROM gptran WHERE UserID = '$login' && CardSerial='{$_P0ST['gamecard']}'") or die('Query failed: ' . mysql_error());

?>