如果$ s无效，则重定向

Question

This is code from ajax script, after computing through all the necessary conditions $n and $view are created and displayed with the following code

<?php
//ajax conditions
?>
<data>
<handler value="show_view"/>
<item id="view<?php echo $n;?>" 
value="<?php echo rawurlencode($view);
        if (strpos($s,'invalid') !== false) 
        {
         echo "Hit Invalid";
         $url = $_SERVER['HTTP_REFERER'];
         header( "Location: $url" ); //<--not working   
         exit;
        }
      ?>"/>
<item id="end" value=""/>
</data>

I have $s in script..all i want to do is redirect script if the variable $s in invalid..script works fine but redirect doesn't work. Please suggest some solution to this problem. Thanks in advance.

Answer 1

Why not put the header where you have the conditions at the very top? for the location header it needs to be outputted first before anything else.

Since i am unsure what your trying to accomplish with adding stuff to value=" if you just want a quick redirect you could just hand it over to javascript to do.

value="<?php echo rawurlencode($view);?>" />
<?php
if (strpos($s,'invalid') !== false) 
{
?>
    <script>
      top.window.location = '<?php echo $_SERVER['HTTP_REFERER']; ?>';
     </script>
<?php 
} 
?>

I would suggest re-visiting what your trying to do and tackle it another way as this is not ideal.