DedeCMSv5/src/include/uploadsafe.inc.php

<?php
if(!defined('DEDEINC')) exit('Request Error!');

if(isset($_FILES['GLOBALS'])) exit('Request not allow!');

//为了防止用户通过注入的可能性改动了数据库
//这里强制限定的某些文件类型禁止上传
$cfg_not_allowall = "php|pl|cgi|asp|aspx|jsp|php3|shtm|shtml";
$keyarr = array('name', 'type', 'tmp_name', 'size');
if ($GLOBALS['cfg_html_editor']=='ckeditor' && isset($_FILES['upload']) || 
$GLOBALS['cfg_html_editor']=='ckeditor4' && isset($_FILES['upload'])
)
{
    $_FILES['imgfile'] = $_FILES['upload'];
    $CKUpload = TRUE;
    unset($_FILES['upload']);
}
foreach($_FILES as $_key=>$_value)
{
    foreach($keyarr as $k)
    {
        if(!isset($_FILES[$_key][$k]))
        {
            exit('Request Error!');
        }
    }
    if( preg_match('#^(cfg_|GLOBALS)#', $_key) )
    {
        exit('Request var not allow for uploadsafe!');
    }
    $$_key = $_FILES[$_key]['tmp_name'];
    ${$_key.'_name'} = $_FILES[$_key]['name'];
    ${$_key.'_type'} = $_FILES[$_key]['type'] = preg_replace('#[^0-9a-z\./]#i', '', $_FILES[$_key]['type']);
    ${$_key.'_size'} = $_FILES[$_key]['size'] = preg_replace('#[^0-9]#','',$_FILES[$_key]['size']);
    if(!empty(${$_key.'_name'}) && (preg_match("#\.(".$cfg_not_allowall.")$#i",${$_key.'_name'}) || !preg_match("#\.#", ${$_key.'_name'})) )
    {
        if(!defined('DEDEADMIN'))
        {
            exit('Not Admin Upload filetype not allow !');
        }
    }
    if(empty(${$_key.'_size'}))
    {
        ${$_key.'_size'} = @filesize($$_key);
    }
    
    $imtypes = array
    (
        "image/pjpeg", "image/jpeg", "image/gif", "image/png", 
        "image/xpng", "image/wbmp", "image/bmp"
    );

    if(in_array(strtolower(trim(${$_key.'_type'})), $imtypes))
    {
        $image_dd = @getimagesize($$_key);
        if (!is_array($image_dd))
        {
            exit('Upload filetype not allow !');
        }
    }
}
?>