set a php variable only in the iframe

Question

so i have a code like this:

if ($var == null || 'NULL'){ echo "<h1>something</h1>"; echo "<div id='footer'><b>something</b><br/><br/><br/></div>"; echo "<b>something</b>";} else {}

so, on my main page the value var == null and that's great because i want those linse to be displayed in that page, but if i have an iframe somewhere else and i want to set this variable to 1 like $var = 1 so it doesn't show in the iframe but instead will show on the main page because there the value is null, how can i do this?

You can't detect if your page is being shown in an iframe with PHP. — Fad
– Fad, Commented Sep 26, 2012 at 13:20
are you sure you want to if ($var == null || 'NULL'), not if (is_null($var) || $var === 'NULL') ? — wroniasty
– wroniasty, Commented Sep 26, 2012 at 13:21
YOu should change if ($var == null || 'NULL'){ to if (empty($var)){ — Baba
– Baba, Commented Sep 26, 2012 at 13:22
yes, it's not an issue that, i meant if (empty($var)){ but my question how to trigger it from the iframe with someJquery or something — Abude
– Abude, Commented Sep 26, 2012 at 13:23

wroniasty · Accepted Answer · 2012-09-26 13:23:52Z

You can't detect an iframe on the server-side, but you can pass an additional parameter to your script when embedding an iframe on your page:

<iframe src="script.php?iframe=1"></iframe>

And then check for the value of $_GET['iframe'].

But you will lose it when you navigate to another page in the iframe.

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