Finding out DPI using GD

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To: php-general@xxxxxxxxxxxxx
Subject: Finding out DPI using GD
From: "Karuna" <karuna.kgx@xxxxxxxxx>
Date: Wed, 15 Feb 2006 09:15:13 +1300
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Hi. Is it possible to find out the dpi of an image (preferably jpeg) in php? 
I can't seem to find any function to do this.

Cheers,
Karuna. 

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