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? ??? ?? PHP ???? PHP?? ?? ??? ??? ????? ???? ??? ??????

PHP?? ?? ??? ??? ????? ???? ??? ??????

Nov 15, 2024 am 05:26 AM

How to Reliably Determine File Content-Type in PHP?

PHP?? ?? ?? ?? ??

PHP??? ??? ?? ? ??? ?? ??? ???? ?? ??????. ??? ??. ??? ?? ??? ??? MIME ??? ???? ?? ?????? ??? ???? ??? ? ????.

Content-Type ??

???? ?? ??? ??? ????. getFileMimeType() ??? ?????:

function getFileMimeType($file) {
    if (function_exists('finfo_file')) {
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $type = finfo_file($finfo, $file);
        finfo_close($finfo);
    } else {
        require_once 'upgradephp/ext/mime.php';
        $type = mime_content_type($file);
    }

    if (!$type || in_array($type, array('application/octet-stream', 'text/plain'))) {
        $secondOpinion = exec('file -b --mime-type ' . escapeshellarg($file), $foo, $returnCode);
        if ($returnCode === 0 && $secondOpinion) {
            $type = $secondOpinion;
        }
    }

    if (!$type || in_array($type, array('application/octet-stream', 'text/plain'))) {
        require_once 'upgradephp/ext/mime.php';
        $exifImageType = exif_imagetype($file);
        if ($exifImageType !== false) {
            $type = image_type_to_mime_type($exifImageType);
        }
    }

    return $type;
}

? ??? ??? ??? ??? ??? ???? ??? ??? ????? ?????.

  • PHP? finfo ??(?? ??? ??)
    *Upgrade.php ?????? mime_content_type()
  • OS? ?? ??(*NIX ????)
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