/*检测文件的类型
*(array)$files 文件数组
*/
private function check_file_type($files) {
$this->filelist = array();
foreach($files as $key=>$file) {
if($file['error'] == 0) {
$ext = strtolower(substr($file['name'], strrpos($file['name'], '.') + 1));
$str = @file_get_contents($file['tmp_name'],FALSE,NULL,0,20);
if((in_array($ext,array('jpg','jpeg')) && substr($str ,0, 3) !== "\xFF\xD8\xFF") || ($ext == 'gif' && substr($str ,0, 4) !== 'GIF8') || ($ext == 'png' && substr($str ,0, 8) !== "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") || ($ext == 'bmp' && substr($str ,0, 2) !== 'BM') || ($ext == 'swf' && (substr($str ,0, 3) !== 'CWS' || substr($str ,0, 3) !== 'FWS')) || ($ext == 'zip' && substr($str ,0, 4) !== "PK\x03\x04") || ($ext == 'rar' && substr($str ,0, 4) !== 'Rar!') || ($ext == 'pdf' && substr($str ,0, 4) !== "\x25PDF") || ($ext == 'chm' && substr($str ,0, 4) !== 'ITSF') || ($ext == 'rm' && substr($str ,0, 4) !== "\x2ERMF") || ($ext == 'exe' && substr($str ,0, 2) !== "MZ") || (in_array($ext,array('doc','xls','ppt')) && substr($str ,0, 4) !== "\xD0\xCF\x11\xE0")) {
$this->log .= $file['name'] . "文件类型与文件内容不符合。\n";
}elseif((!empty($this->extensionFileFormat) && in_array($ext,$this->extensionFileFormat)) || (empty($this->extensionFileFormat) && (in_array($ext,$this->ImageFileFormat) || in_array($ext,$this->OtherFileFormat)))) {
$this->filelist[$key] = $file;
}else{
$this->log .= $file['name'] . "不符合上传文件的类型。\n";
@unlink($file['tmp_name']);
}}}}

/*生成上传目录
*
*/
private function makeDirectory() {
$directoryName = str_replace("\\","/", $this->savePath);
$dirNames = explode('/', $directoryName);
$total = count($dirNames);
$temp = '';
for($i=0; $i<$total; $i++)
{
$temp .= $dirNames[$i].'/';
if (!is_dir($temp))
{
$oldmask = @umask(0);
if (!@mkdir($temp, 0777)) return false;
@umask($oldmask);
}
};
if(is_dir($this->savePath)) {
return true;
} else {
return false;
};
}
}?>