php - How to get refering URL when redirected from some page to another page -

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i redirecting several pages dev.php using php header

<?php header(location: dev.php); ?>

i want know have been redirected here.

i have tried 

<?php print "you entered using link on ".$_server["http_referer"]; ?>

but dosent work $_server["http_referer"]; works if access dev.php using <a href="dev.php">go developer page</a>

so how can referring url?

try below.

<?php header(location: dev.php?referrer=$_server[php_self]); ?>

or

header('referer: '.$_server['php_self']); header(location: dev.php);

if above methods don't work, have go sessions.


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