Heim  >  Artikel  >  Backend-Entwicklung  >  php准确获取文件MIME类型的方法,_PHP教程

php准确获取文件MIME类型的方法,_PHP教程

WBOY
WBOYOriginal
2016-07-13 09:49:51958Durchsuche

php准确获取文件MIME类型的方法,

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:

&#65279;<&#63;php
$mime = array (
    //applications
    'ai'  => '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-php') OR 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']) &#63; strtolower($pinfo['extension']) : '';
      $type = isset($mime[$ext]) &#63; $mime[$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']) &#63; 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。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1018524.htmlTechArticlephp准确获取文件MIME类型的方法, 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: php$mime =...
Stellungnahme:
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn