使用<iframe>时，foreach循环仅返回一个值

Following is the PHP code I'm facing problem with:

<?php 
    $query="SELECT `url` FROM `videos";
    $query_run=mysql_query($query);
    while($row=mysql_fetch_array($query_run)){
        $result[]=$row;}
        foreach($result as $var){
            $url=$var['0'];
            echo "<iframe width='250' height='200' src='".$url."' frameborder='0'>";
        }
?>

The problem is that it returns only one result of <iframe> tag, but echoing out $url i.e

<?php 
    $query="SELECT `url` FROM `videos`";
    $query_run=mysql_query($query);
    while($row=mysql_fetch_array($query_run)){
        $result[]=$row;}
        foreach($result as $var){
            $url=$var['0'];
            echo $url;
        }
?>

returns all the available results.

Please help

You have to specify a closing tag </iframe>.

<?php 
    $query="SELECT `url` FROM `videos";
    $query_run=mysql_query($query);
    while($row=mysql_fetch_array($query_run)){
        $result[]=$row;}
        foreach($result as $var){
            $url=$var['0'];
            echo "<iframe width='250' height='200' src='".$url."' frameborder='0'></iframe>";
        }
?>