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@jhansche
Created September 19, 2012 18:55
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getimagesizefromstring() replacement
function getmimetypefromstring($data)
{
// Most image types can be determined in 25 bytes or less.
$data = substr($data, 0, 32);
$uri = 'data://application/octet-stream;base64,' . base64_encode($data);
return exif_imagetype($uri);
}
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