本文实例讲述了PHP准确获取文件MIME类型的方法。分享给大家供大家参考。具体实现方法如下：
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'application/postscript','eps' => 'application/postscript','exe' => 'application/octet-stream','doc' => 'application/vnd.ms-word','xls' => 'application/vnd.ms-excel','ppt' => 'application/vnd.ms-powerpoint','pps' => 'application/vnd.ms-powerpoint','pdf' => 'application/pdf','xml' => 'application/xml','odt' => 'application/vnd.oasis.opendocument.text','swf' => 'application/x-shockwave-flash',// archives
'gz' => 'application/x-gzip','tgz' => 'application/x-gzip','bz' => 'application/x-bzip2','bz2' => 'application/x-bzip2','tbz' => 'application/x-bzip2','zip' => 'application/zip','rar' => 'application/x-rar','tar' => 'application/x-tar','7z' => 'application/x-7z-compressed',// texts
'txt' => 'text/plain','PHP' => 'text/x-PHP','html' => 'text/html','htm' => 'text/html','js' => 'text/javascript','css' => 'text/css','rtf' => 'text/rtf','rtfd' => 'text/rtfd','py' => 'text/x-python','java' => 'text/x-java-source','rb' => 'text/x-ruby','sh' => 'text/x-shellscript','pl' => 'text/x-perl','sql' => 'text/x-sql',// images
'bmp' => 'image/x-ms-bmp','jpg' => 'image/jpeg','jpeg' => 'image/jpeg','gif' => 'image/gif','png' => 'image/png','tif' => 'image/tiff','tiff' => 'image/tiff','tga' => 'image/x-targa','psd' => 'image/vnd.adobe.photoshop',//audio
'mp3' => 'audio/mpeg','mid' => 'audio/midi','ogg' => 'audio/ogg','mp4a' => 'audio/mp4','wav' => 'audio/wav','wma' => 'audio/x-ms-wma',// video
'avi' => 'video/x-msvideo','dv' => 'video/x-dv','mp4' => 'video/mp4','mpeg' => 'video/mpeg','mpg' => 'video/mpeg','mov' => 'video/quicktime','wm' => 'video/x-ms-wmv','flv' => 'video/x-flv','mkv' => 'video/x-matroska'
);
function _getMimeDetect() {
if (class_exists('finfo')) {
return 'finfo';
} else if (function_exists('mime_content_type')) {
return 'mime_content_type';
} else if ( function_exists('exec')) {
$result = exec('file -ib '.escapeshellarg(__FILE__));
if ( 0 === strpos($result,'text/x-PHP') OR 0 === strpos($result,'text/x-c++')) {
return 'linux';
}
$result = exec('file -Ib '.escapeshellarg(__FILE__));
if ( 0 === strpos($result,'text/x-c++')) {
return 'bsd';
}
}
return 'internal';
}
function _getMimeType($path) {
global $mime;
$fmime = _getMimeDetect();
switch($fmime) {
case 'finfo':
$finfo = finfo_open(FILEINFO_MIME);
if ($finfo)
$type = @finfo_file($finfo,$path);
break;
case 'mime_content_type':
$type = mime_content_type($path);
break;
case 'linux':
$type = exec('file -ib '.escapeshellarg($path));
break;
case 'bsd':
$type = exec('file -Ib '.escapeshellarg($path));
break;
default:
$pinfo = pathinfo($path);
$ext = isset($pinfo['extension']) ? strtolower($pinfo['extension']) : '';
$type = isset($mime[$ext]) ? $mime[$ext] : 'unkown';
break;
}
$type = explode(';',$type);
//需要加上这段，因为如果使用mime_content_type函数来获取一个不存在的$path时会返回'application/octet-stream'
if ($fmime != 'internal' AND $type[0] == 'application/octet-stream') {
$pinfo = pathinfo($path);
$ext = isset($pinfo['extension']) ? strtolower($pinfo['extension']) : '';
if (!empty($ext) AND !empty($mime[$ext])) {
$type[0] = $mime[$ext];
}
}
return $type[0];
}
$path = '1.txt'; //实际上当前路径并不存在1.txt
var_dump(_getMimeType($path));
/*End of PHP*/
希望本文所述对大家的PHP程序设计有所帮助。
