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    Images in headers
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    Posted by fortech  · 11-04-2013 - 12:13

    I think I found the root cause.

    classes/CreateImage::
    private function getDpiPng($filename)
    {
    $a = fopen($filename, 'r');
    $string = fread($a, 1000);
    $aux = strpos($string, 'pHYs'); // <-- $aux = 0, pHYs is not in the file
    $data = bin2hex(substr($string, $aux + strlen('pHYs'), 16));
    fclose($a);
    $x = substr($data, 0, 8);
    $y = substr($data, 8, 8);
    return array(hexdec($x), hexdec($y));
    }