php 读取文件头判断文件类型的实现代码

php 读取文件头判断文件类型的实现代码

例子：

<?php  = "11.jpg"
 = (, "rb" = (, 2); 
( = @("C2chars",  = (['chars1'].['chars2' = '' ( 7790:  = 'exe';  7784:  = 'midi';  8297:  = 'rar';  255216:  = 'jpg';  7173:  = 'gif';  6677:  = 'bmp';  13780:  = 'png'; : 'unknown''这是一个'..' file:'.?>

<?
 mime_content_type('11.gif') . "\n" mime_content_type('22.php'?>