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

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

Nov 19, 2024 pm 01:44 PM

How Can I Determine the Content-Type of a File in PHP?

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

?? ??? ??? ???? ?? ? ??? ???? ???? ?? ?????. ?? ??? ?????. ?? ??? ?????? ??? ???? ????? ?????. PHP??? ??? ??? ???? ??? ??? ??? ? ????.

'finfo_file()' ??(??)

PHP ??? finfo ???? ???? ?? ??? MIME ??? ?? ?? 'finfo_file()'? ??? ? ????. ?? ??? ????.

$finfo = finfo_open(FILEINFO_MIME_TYPE);
$contentType = finfo_file($finfo, $file);
finfo_close($finfo);

'mime_content_type()' ??

'finfo_file()'? ??? ??? 'mime_content_type()' ?????. ??? ?? PHP ???? ?? ???? ?? ? ????.

require_once 'upgradephp/ext/mime.php'; // Load the mime extension if necessary
$contentType = mime_content_type($file);

?? ??

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

  • exec('file -b --mime-type ...'): ??? ?? 'file' ??? ???? MIME ??? ????. . ? ??? *NIX ????? ?????.
  • exif_imagetype(): ??? ???? ?? ? ??? MIME ??? ??? ? ????.
  • 'upgradephp /ext/mime.php': Upgrade.php? ?? PHP ??? ??? ?? ? ?? ?? mime_content_type() ??? ?????.

?? ?

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

function getFileMimeType($file) {
    $contentType = null;

    if (function_exists('finfo_file')) {
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $contentType = finfo_file($finfo, $file);
        finfo_close($finfo);
    } elseif (function_exists('mime_content_type')) {
        require_once 'upgradephp/ext/mime.php';
        $contentType = mime_content_type($file);
    } elseif (is_file($file)) {
        // Executing 'file' command
    } elseif (@exif_imagetype($file)) {
        // Determining image mime type
    }

    return $contentType;
}

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