Fast Remote PHP Technique To Detect Image 404

Posted by Volomike on Stack Overflow See other posts from Stack Overflow or by Volomike
Published on 2010-04-18T01:42:12Z Indexed on 2010/04/18 1:43 UTC
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php

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gd

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curl

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jpeg

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image

What PHP script technique runs the fastest in detecting if a remote image does not exist before I include the image? I mean, I don't want to download all the bytes of the remote image -- just enough to detect if it exists.

And while on the subject but with just a slight deviation, I'd like to download just enough bytes to determine a JPEG's width and height information.

Speed is very important in my concern here on this system design I'm working on.

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