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phpiconsico

How to detect if *.ico file is a valid icon in PHP

I would like to test if *.ico images are valid icons in PHP. I tried to use getimagesize function but it doesn't support ICO files.

Solution

  • http://en.wikipedia.org/wiki/ICO_(file_format)

    icon must start with the '0x00 0x00 0x01 0x00' bytes, it shall be enough for simple test.