php准确获取文件MIME类型的方法_PHP

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：

 &＃039;application/postscript&＃039;,    &＃039;eps&＃039;  => &＃039;application/postscript&＃039;,    &＃039;exe&＃039;  => &＃039;application/octet-stream&＃039;,    &＃039;doc&＃039;  => &＃039;application/vnd.ms-word&＃039;,    &＃039;xls&＃039;  => &＃039;application/vnd.ms-excel&＃039;,    &＃039;ppt&＃039;  => &＃039;application/vnd.ms-powerpoint&＃039;,    &＃039;pps&＃039;  => &＃039;application/vnd.ms-powerpoint&＃039;,    &＃039;pdf&＃039;  => &＃039;application/pdf&＃039;,    &＃039;xml&＃039;  => &＃039;application/xml&＃039;,    &＃039;odt&＃039;  => &＃039;application/vnd.oasis.opendocument.text&＃039;,    &＃039;swf&＃039;  => &＃039;application/x-shock@本文9来源gao($daima.com搞@代@#码8网^搞代gaodaima码wave-flash&＃039;,    // archives    &＃039;gz&＃039;  => &＃039;application/x-gzip&＃039;,    &＃039;tgz&＃039;  => &＃039;application/x-gzip&＃039;,    &＃039;bz&＃039;  => &＃039;application/x-bzip2&＃039;,    &＃039;bz2&＃039;  => &＃039;application/x-bzip2&＃039;,    &＃039;tbz&＃039;  => &＃039;application/x-bzip2&＃039;,    &＃039;zip&＃039;  => &＃039;application/zip&＃039;,    &＃039;rar&＃039;  => &＃039;application/x-rar&＃039;,    &＃039;tar&＃039;  => &＃039;application/x-tar&＃039;,    &＃039;7z&＃039;  => &＃039;application/x-7z-compressed&＃039;,    // texts    &＃039;txt&＃039;  => &＃039;text/plain&＃039;,    &＃039;php&＃039;  => &＃039;text/x-php&＃039;,    &＃039;html&＃039; => &＃039;text/html&＃039;,    &＃039;htm&＃039;  => &＃039;text/html&＃039;,    &＃039;js&＃039;  => &＃039;text/Javascript&＃039;,    &＃039;css&＃039;  => &＃039;text/css&＃039;,    &＃039;rtf&＃039;  => &＃039;text/rtf&＃039;,    &＃039;rtfd&＃039; => &＃039;text/rtfd&＃039;,    &＃039;py&＃039;  => &＃039;text/x-python&＃039;,    &＃039;java&＃039; => &＃039;text/x-java-source&＃039;,    &＃039;rb&＃039;  => &＃039;text/x-ruby&＃039;,    &＃039;sh&＃039;  => &＃039;text/x-shellscript&＃039;,    &＃039;pl&＃039;  => &＃039;text/x-perl&＃039;,    &＃039;sql&＃039;  => &＃039;text/x-sql&＃039;,    // images    &＃039;bmp&＃039;  => &＃039;image/x-ms-bmp&＃039;,    &＃039;jpg&＃039;  => &＃039;image/jpeg&＃039;,    &＃039;jpeg&＃039; => &＃039;image/jpeg&＃039;,    &＃039;gif&＃039;  => &＃039;image/gif&＃039;,    &＃039;png&＃039;  => &＃039;image/png&＃039;,    &＃039;tif&＃039;  => &＃039;image/tiff&＃039;,    &＃039;tiff&＃039; => &＃039;image/tiff&＃039;,    &＃039;tga&＃039;  => &＃039;image/x-targa&＃039;,    &＃039;psd&＃039;  => &＃039;image/vnd.adobe.photoshop&＃039;,    //audio    &＃039;mp3&＃039;  => &＃039;audio/mpeg&＃039;,    &＃039;mid&＃039;  => &＃039;audio/midi&＃039;,    &＃039;ogg&＃039;  => &＃039;audio/ogg&＃039;,    &＃039;mp4a&＃039; => &＃039;audio/mp4&＃039;,    &＃039;wav&＃039;  => &＃039;audio/wav&＃039;,    &＃039;wma&＃039;  => &＃039;audio/x-ms-wma&＃039;,    // video    &＃039;avi&＃039;  => &＃039;video/x-msvideo&＃039;,    &＃039;dv&＃039;  => &＃039;video/x-dv&＃039;,    &＃039;mp4&＃039;  => &＃039;video/mp4&＃039;,    &＃039;mpeg&＃039; => &＃039;video/mpeg&＃039;,    &＃039;mpg&＃039;  => &＃039;video/mpeg&＃039;,    &＃039;mov&＃039;  => &＃039;video/quicktime&＃039;,    &＃039;wm&＃039;  => &＃039;video/x-ms-wmv&＃039;,    &＃039;flv&＃039;  => &＃039;video/x-flv&＃039;,    &＃039;mkv&＃039;  => &＃039;video/x-matroska&＃039;    );function _getMimeDetect() {  if (class_exists(&＃039;finfo&＃039;)) {    return &＃039;finfo&＃039;;  } else if (function_exists(&＃039;mime_content_type&＃039;)) {    return &＃039;mime_content_type&＃039;;  } else if ( function_exists(&＃039;exec&＃039;)) {    $result = exec(&＃039;file -ib &＃039;.escapeshellarg(__FILE__));    if ( 0 === strpos($result, &＃039;text/x-php&＃039;) OR 0 === strpos($result, &＃039;text/x-c++&＃039;)) {      return &＃039;linux&＃039;;    }    $result = exec(&＃039;file -Ib &＃039;.escapeshellarg(__FILE__));    if ( 0 === strpos($result, &＃039;text/x-php&＃039;) OR 0 === strpos($result, &＃039;text/x-c++&＃039;)) {      return &＃039;bsd&＃039;;    }  }  return &＃039;internal&＃039;;}function _getMimeType($path) {  global $mime;  $fmime = _getMimeDetect();  switch($fmime) {    case &＃039;finfo&＃039;:      $finfo = finfo_open(FILEINFO_MIME);      if ($finfo)         $type = @finfo_file($finfo, $path);      break;    case &＃039;mime_content_type&＃039;:      $type = mime_content_type($path);      break;    case &＃039;linux&＃039;:      $type = exec(&＃039;file -ib &＃039;.escapeshellarg($path));      break;    case &＃039;bsd&＃039;:      $type = exec(&＃039;file -Ib &＃039;.escapeshellarg($path));      break;    default:      $pinfo = pathinfo($path);      $ext = isset($pinfo[&＃039;extension&＃039;]) ? strtolower($pinfo[&＃039;extension&＃039;]) : &＃039;&＃039;;      $type = isset($mime[$ext]) ? $mime[$ext] : &＃039;unkown&＃039;;      break;  }  $type = explode(&＃039;;&＃039;, $type);  //需要加上这段，因为如果使用mime_content_type函数来获取一个不存在的$path时会返回&＃039;application/octet-stream&＃039;  if ($fmime != &＃039;internal&＃039; AND $type[0] == &＃039;application/octet-stream&＃039;) {    $pinfo = pathinfo($path);     $ext = isset($pinfo[&＃039;extension&＃039;]) ? strtolower($pinfo[&＃039;extension&＃039;]) : &＃039;&＃039;;    if (!empty($ext) AND !empty($mime[$ext])) {      $type[0] = $mime[$ext];    }  }  return $type[0];}$path = &＃039;1.txt&＃039;; //实际上当前路径并不存在1.txtvar_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。