sql语句在phpMyAdmin中有效，但赢得了'；不能在mysql_query中工作

真的陷入了困境。我正在尝试更新一个数据库，代码看起来是写的——如果我将其回显并直接粘贴到phpMyAdmin中，它就可以完美地工作——但代码本身不起作用。。。到目前为止，我花了一天时间试图弄清楚为什么它不起作用，我完全没有想法。。。

function restoreSession() 
{
mysql_connect("theHost", "root", "rootPWD") or die(mysql_error());
mysql_select_db("myDatabase") or die(mysql_error());    
$restore_cmd = 'UPDATE wp_dor_cart66_sessions SET user_data = (SELECT user_data FROM wp_dor_cart66_stored_sessions WHERE ip_address = "' . $_SERVER['REMOTE_ADDR'] . '")';
$clean_up = "DELETE FROM `wp_dor_cart66_sessions` WHERE `ip_address` = '"" . $_SERVER['REMOTE_ADDR'] . "'" AND id NOT IN (SELECT id FROM ( SELECT id FROM `wp_dor_cart66_sessions` ORDER BY id DESC LIMIT 1 ) user_data )";
mysql_query($clean_up) or die('Query failed: ' . mysql_error()); 
$result = mysql_query($restore_cmd) or die('Query failed: ' . mysql_error()); 
echo "<br/>";
echo $restore_cmd;
echo "<br/>";
var_dump($result);
echo "<br/>";
print_r($result);
}

结果输出看起来像：

UPDATE wp_dor_cart66_sessions SET user_data = 
(SELECT user_data FROM   wp_dor_cart66_stored_sessions 
WHERE ip_address = "196.54.110.24");
bool(true)
1

它似乎没有任何错误，但我就是无法更新它。如果它在phpMyAdmin中不起作用——我知道SQL有问题——但它似乎是对的。。。我真的没有主意了——任何帮助都将不胜感激！

以下是带有一些格式的语句：

$restore_cmd = '
    UPDATE
        wp_dor_cart66_sessions
    SET
        user_data = (
            SELECT
                user_data
            FROM
                wp_dor_cart66_stored_sessions
            WHERE
                ip_address = "' . $_SERVER['REMOTE_ADDR'] . '"
        )
';
$clean_up = "
    DELETE FROM
        `wp_dor_cart66_sessions`
    WHERE
        `ip_address` = '"" . $_SERVER['REMOTE_ADDR'] . "'"
        AND id NOT IN (
            SELECT
                id
            FROM
                (
                    SELECT
                        id
                    FROM
                        `wp_dor_cart66_sessions`
                    ORDER BY
                        id DESC
                    LIMIT
                        1
                ) user_data
        )
";