What is the equivalent of top.location in php?

I am using javascript top.location to retrieve parent location through javascript

What i wanted to know is there any way to get parent 开发者_Go百科url through php?

I have tried $_SERVER with different parameters but i am getting the child window url.

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top refers to a frame object. There is no way to distinguish a HTTP request for a document that will be rendered in a frame from one that will not.

Therefore, there's no equivalent to the client-side top.location in php (a server-side language). You can, however, block your page from being rendered in a frame by setting the X-Frame-Options HTTP header.

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Your php server code has no chance whatsoever to know what is going on on the client. As well as your js code can't look into the server.

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i used this in my php script...

if (...whatever!) { require("location_top.php"); exit; }

then in location_top.php

<?php // ?>
<h1><a href="scriptname.php" target="_top">Click here to continue</a></h1>
<script type="text/javascript">
<!--
top.location = "scriptname.php";
//-->
</script>

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When the frame first loads, this should be in the HTTP Referer. See HTTP Referer on HTML Frames for details.