MYSQL查询解决方法

MYSQL查询
if (substr($remessage,0,2)== 'TP '){
$PSN=str_replace( 'TP ', ' ',$remessage);
echo $PSN;
exit;
sql= "select id from tempnum where id= ' ".intval($PSN). " ' ";
$rs=$conn-> execute($sql);
if ($rs-> EOF)
{
SMSSendReturnStr($config[ 'sp '],$rs-> fields[ "MobileNum "], '对不起，请没有找到您要投票的人，请核对。谢谢您的参与 ');
}
else{
$conn-> execute( "update tempnum set PS=PS+1 where id= ' ".$PSN. " ' ")
}
break;
exit;

}

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$remessage是用户通过手机发来的短信 ,格式为TP000001 TP后面是数字对应的ID,但是不知道为什么总是查询那出错,先短信格式正确


Parse error: syntax error, unexpected '= ' in D:\web\XXX\XXX.php on line 90


XIEXIE

------解决方案--------------------
sql= "select id from tempnum where id= ' ".intval($PSN). " ' ";
===================
$sql = ".... ";