在MySQL查询中基于结果显示

Question

I have an orders table in mysql and in that for some orders I set particular order status like 'review'. I want to setup a way if any order placed by a particular customer(first and last name) for whom i have previously set order status as 'review' to display a warning in the list.

$sql = "select * from order where firstname = ".$firstname." AND lastname = ".$lastname." AND order_status = 'review';";
                $SQLresult = mysql_query("$sql", $DBcon_MySQL);


            while($row = mysql_fetch_array($SQLresult)) {       
                    foreach($row as $row){

                        $result = "warning!";
                        echo $result;
                    }
            }

The above code does not display anything. please let me know how to fix this.

[EDIT After Applying Answer]

This is how i am using it.

<td width="200">
    <? 
        $sql = "select * from cust_order where firstname = '$firstname' AND lastname = '$lastname' AND order_status = 'review'";
        $SQLResult = mysql_query("$sql", $DBcon_MySQL);

        while($row = mysql_fetch_array($SQLResult )) {      
                //$result;
                foreach($row as $row ){
                    //$result="";

                    $result = "Warning!";

                }

    ?>

        <p><? echo $result;?></p>   
        <?} ?>      
    </td>

How should i insert a check that it should display warning only once No matter how many orders from single customer are marked as review, display warning only once?

Answer 1

try this,

    $sql = "SELECT 
                    * 
            FROM
                    `order` 
            WHERE 
                    firstname = '$firstname' AND lastname = '$lastname' AND 
                    order_status = 'review' LIMIT 1";

    $SQLresult = mysql_query($sql, $DBcon_MySQL);

    while($row = mysql_fetch_array($SQLresult)) {       
        foreach($row as $row){

            $result = "warning!";
            echo $result;
        }
    }

Please be informed that mysql functions are deprecated and not recommended. USE MySQLi or PDO instead. have a reference from following queries.

http://php.net/manual/en/book.mysqli.php

http://php.net/manual/en/book.pdo.php