Tony Devlin wrote:
Hello Everyone,

    I am looking for a script or guidance in where to look to figure out how
to create a php script that resizes an image on the fly when it is called(...)

Image resizing takes a lot of cycles. As opposed to generating a thumbnail every time a visitor comes to your site, cache it.


        /* PHP Psuedocode */
        thumbnail_file = thumbnail-cache/product.png
        if(file_exists(thumbnail_file))
                print <img src=thumbnail_file />
        else
                generate_thumbnail(source, thumbnail_file);
                print <img src=thumbnail_file />

This way, the expensive GD hits only take place once, when the thumbnail is first created. Otherwise, you may get a visitor who constantly refreshes and drives up your load average -- and on shared hosting, this can be problematic.

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