Solution to determine uploaded file type with PHP, _PHP tutorial

The solution for PHP to determine the type of uploaded files.

Share with everyone the method for PHP to determine the type of uploaded files. Let’s learn together.

/**
* 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;
}

I hope this article will help everyone learn PHP programming.

http://www.bkjia.com/PHPjc/1063239.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1063239.htmlTechArticleThe solution for PHP to determine the type of uploaded files. Share with everyone the method for determining the type of uploaded files in PHP. Let’s learn together. . /** * Read the first few bytes of the file to determine the file type...