PHP common form multi-file upload code

/*
* class: 文件上传类
* author: ZMM
* date: 2011.1.20
* email: 304924248@qq.com
* link: http://bbs.it-home.org
*/
class Upload {
public $up_ext=array(), $up_max=5210, $up_dir;
private $up_name, $up_rename=true, $up_num=0, $up_files=array(), $up_ret=array();
function __construct($name, $ext=array(), $rename=true) {
if (!empty($name)) {
$this->up_name = $name;
!empty($ext) && $this->up_ext = $ext;
$this->up_rename = $rename;
$this->up_dir = WEBSITE_DIRROOT.
$GLOBALS['cfg_upload_path'];
$this->InitUpload();
} else {
exit('upload文件域名称为空，初始化失败！');
}
}
private function InitUpload() {
if (is_array($_FILES[$this->up_name])) {
$up_arr = count($_FILES[$this->up_name]);
$up_all = count($_FILES[$this->up_name], 1);
$up_cnt = ($up_all - $up_arr) / $up_arr;
for ($i = 0; $i < $up_cnt; $i ++) {
if ($_FILES[$this->up_name]['error'][$i] != 4) {
$this->up_files[] = array(
'tmp_name' => $_FILES[$this->up_name]['tmp_name'][$i],
'name' => $_FILES[$this->up_name]['name'][$i],
'type' => $_FILES[$this->up_name]['type'][$i],
'size' => $_FILES[$this->up_name]['size'][$i],
'error' => $_FILES[$this->up_name]['error'][$i]
);
}
}
$this->up_num = count($this->up_files);
} else {
if (isset($_FILES[$this->up_name])) {
$this->up_files = array(
'tmp_name' => $_FILES[$this->up_name]['tmp_name'],
'name' => $_FILES[$this->up_name]['name'],
'type' => $_FILES[$this->up_name]['type'],
'size' => $_FILES[$this->up_name]['size'],
'error' => $_FILES[$this->up_name]['error']
);
$this->up_num = 1;
} else {
exit('没找找到需要upload的文件！');
}
}
$this->ChkUpload();
}
private function ChkUpload() {
if (empty($this->up_ext)) {
$up_mime = array('image/wbmp', 'image/bmp', 'image/gif', 'image/pjpeg', 'image/x-png');
foreach ($this->up_files as $up_file) {
$up_allw = false;
foreach ($up_mime as $mime) {
if ($up_file['type'] == $mime) {
$up_allw = true; break;
}
}
!$up_allw && exit('不允许上传'.$up_file['type'].'格式的文件！');
if ($up_file['size'] / 1024 > $this->up_max) {
exit('不允许上传大于 '.$this->up_max.'K 的文件！');
}
}
} else {
foreach ($this->up_files as $up_file) {
$up_ext = end(explode('.', $up_file['name']));
$up_allw = false;
foreach ($this->up_ext as $ext) {
if ($up_ext == $ext) {
$up_allw = true; break;
}
}
!$up_allw && exit('不允许上传.'.$up_ext.'格式的文件！');
if ($up_file['size'] / 1024 > $this->up_max) {
exit('不允许上传大于 '.$this->up_max.'K 的文件！');
}
}
}
$this->Uploading();
}
private function Uploading() {
if (IO::DIRCreate($this->up_dir)) {
if (chmod($this->up_dir, 0777)) {
if (!empty($this->up_files)) {
foreach ($this->up_files as $up_file) {
if (is_uploaded_file($up_file['tmp_name'])) {
$file_name = $up_file['name'];
if ($this->up_rename) {
$file_ext = end(explode('.', $file_name));
$file_rnd = substr(md5(uniqid()), mt_rand(0, 26), 6);
$file_name = date('ymdHis').'_'.$file_rnd.'.'.$file_ext;
}
$file_name = $this->up_dir.'/'.$file_name;
if (move_uploaded_file($up_file['tmp_name'], $file_name)) {
$this->up_ret[] = str_replace(WEBSITE_DIRROOT, '', $file_name);
} else {
exit('文件上传失败！');
}
}
}
}
} else {
exit('未开启写入权限！');
}
} else {
exit('上传目录创建失败！');
}
}
public function GetUpload() {
return empty($this->up_ret) ? false : $this->up_ret;
}
function __destruct() {}
}
?>