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[TheConeHead]

is there a way in PHP (not javascript) to retrieve the page someone came from like if you wanted to make a back button?

 

[LTeeple]

Yes!

$back = $_SERVER["HTTP_REFERER"];
echo '<a href=\"'.$back.'\">Go back: '.$back.'</a>';

It only works if that page was arrived on via a link, as opposed to typing in the URL.


Cheers!
Laura

 

[LTeeple]

In addition, to be safe, you could code it as follows:

if ($_SERVER["HTTP_REFERER"]){
  $back = $_SERVER["HTTP_REFERER"];
  echo '<a href=\"'.$back.'\">Go back: '.$back.'</a>';
}
else
  echo "<a href=\"javascript:history.go(-1);\">Go Back</a>";

That way, if the user types in the URL, you just won't have a broken link.


Cheers!
Laura

 

[jemminger]

beware:

'HTTP_REFERER'

The address of the page (if any) which referred the user agent to the current page. [highlight]This is set by the user agent. Not all user agents will set this, and some provide the ability to modify HTTP_REFERER as a feature. In short, it cannot really be trusted. [/highlight]

http://www.php.net/manual/en/reserved.variables.php#reserved.variables.server

-jeff

http://www.jeffemminger.com

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