Hash/checksum for an image?

From: Date: Tue, 16 Jan 2007 01:16:54 +0000
Subject: Hash/checksum for an image?
Groups: php.general 
Request: Send a blank email to php-general+get-247128@lists.php.net to get a copy of this message
I want to make sure that a jpg uploaded by the user is unique. I was thinking about storing a hash code for each image in its MySQL record (got a db record for each uploaded image already). Is there an easy way to generate such a string?

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