我注意到get_mime()现在已经折旧,那么创建以下函数的替代方法是什么？此功能通过我使用的CMS使用,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';
    }
}

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'; 
}