PHP Mime 类型检查的替代方法吗？

Question

我注意到 get_mime() 现在已贬值，那么创建以下函数的替代方法是什么？此功能是通过我使用的 cms 使用的，因此需要一个可靠的替代方案。

// Mime Type Checker
function get_mime ($filename,$mode=0) {

    // mode 0 = full check
    // mode 1 = extension check only

    $mime_types = array(

        'txt' => 'text/plain',
        'htm' => 'text/html',
        'html' => 'text/html',
        'php' => 'text/html',
        'css' => 'text/css',
        'js' => 'application/javascript',
        'json' => 'application/json',
        'xml' => 'application/xml',
        'swf' => 'application/x-shockwave-flash',
        'flv' => 'video/x-flv',

        // images
        'png' => 'image/png',
        'jpe' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'jpg' => 'image/jpeg',
        'gif' => 'image/gif',
        'bmp' => 'image/bmp',
        'ico' => 'image/vnd.microsoft.icon',
        'tiff' => 'image/tiff',
        'tif' => 'image/tiff',
        'svg' => 'image/svg+xml',
        'svgz' => 'image/svg+xml',

        // archives
        'zip' => 'application/zip',
        'rar' => 'application/x-rar-compressed',
        'exe' => 'application/x-msdownload',
        'msi' => 'application/x-msdownload',
        'cab' => 'application/vnd.ms-cab-compressed',

        // audio/video
        'mp3' => 'audio/mpeg',
        'qt' => 'video/quicktime',
        'mov' => 'video/quicktime',

        // adobe
        'pdf' => 'application/pdf',
        'psd' => 'image/vnd.adobe.photoshop',
        'ai' => 'application/postscript',
        'eps' => 'application/postscript',
        'ps' => 'application/postscript',

        // ms office
        'doc' => 'application/msword',
        'rtf' => 'application/rtf',
        'xls' => 'application/vnd.ms-excel',
        'ppt' => 'application/vnd.ms-powerpoint',
        'docx' => 'application/msword',
        'xlsx' => 'application/vnd.ms-excel',
        'pptx' => 'application/vnd.ms-powerpoint',


        // open office
        'odt' => 'application/vnd.oasis.opendocument.text',
        'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
    );

    $ext = strtolower(array_pop(explode('.',$filename)));

    if (function_exists('mime_content_type') && $mode==0) {
        $mimetype = mime_content_type($filename);
        return $mimetype;
    }

    if (function_exists('finfo_open') && $mode==0) {
        $finfo = finfo_open(FILEINFO_MIME);
        $mimetype = finfo_file($finfo, $filename);
        finfo_close($finfo);
        return $mimetype;

    } elseif (array_key_exists($ext, $mime_types)) {
        return $mime_types[$ext];
    } else {
        return 'application/octet-stream';
    }
}

Answer 1

finfo_file是 mime_content_type 的替代品。

由于 finfo_file 仅在 PHP 5.3.0+ 中可用，因此您所做的是正确的。如果 finfo_file 可用，则使用它，否则回退到 mime_content_type，如果我们不能使用 finfo_file，它应该可用。

你应该像这样更新你的条件检查:

if(function_exists('mime_content_type')&&$mode==0){ 
        $mimetype = mime_content_type($filename); 
        return $mimetype; 

}elseif(function_exists('finfo_open')&&$mode==0){ 
        $finfo = finfo_open(FILEINFO_MIME); 
        $mimetype = finfo_file($finfo, $filename); 
        finfo_close($finfo); 
        return $mimetype; 
}elseif(array_key_exists($ext, $mime_types)){ 
        return $mime_types[$ext]; 
}else { 
        return 'application/octet-stream'; 
}