Home > Backend Development > PHP Tutorial > PHP判断上传文件类型的解决办法_PHP

PHP判断上传文件类型的解决办法_PHP

WBOY
Release: 2016-05-30 08:44:14
Original
775 people have browsed it

分享给大家php判断上传文件类型的方法,大家一起学习学习。

/** 
* 读取文件前几个字节 判断文件类型 
* @return String 
*/ 
function checkTitle($filename){ 
  $file=fopen($filename, "rb"); 
  $bin=fread($file, 2); //只读2字节 
  fclose($file); 
  $strInfo =@unpack("c2chars", $bin); 
  $typeCode=intval($strInfo['chars1'].$strInfo['chars2']); 
  $fileType=''; 
  switch($typeCode){ 
    case 7790: 
      $fileType='exe'; 
    break; 
    case 7784: 
      $fileType='midi'; 
    break; 
    case 8297: 
      $fileType='rar'; 
    break; 
    case 255216: 
      $fileType='jpg'; 
    break; 
    case 7173: 
      $fileType='gif'; 
    break; 
    case 6677: 
      $fileType='bmp'; 
    break; 
    case 13780: 
      $fileType='png'; 
    break; 
    default: 
      $fileType='unknown'.$typeCode; 
    break; 
  } 
  //Fix 
  if($strInfo['chars1']=='-1' && $strInfo['chars2']=='-40'){ 
    return 'jpg'; 
  } 
  if($strInfo['chars1']=='-119' && $strInfo['chars2']=='80'){ 
    return 'png'; 
  } 
  return $fileType; 
} 
Copy after login

希望通过本文对大家学习php程序设计有所帮助。

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template