PHP判断上传文件类型的解决办法
php通过判断上传文件的头字符来判断文件的类型,这可以称得上是最安全,最真实确定上传文件类型的方法了,具体实现方法如下
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; }
希望通过本文对大家学习php程序设计有所帮助。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)
