$this->field = $field;
$this->savepath = $this->upload_root.$this->upload_dir.date('Ymd');//这里我们需要修改下.也可以不修改.在我们实例化这个类的时候再来指定目录.
$this->alowexts = $alowexts;
$this->maxsize = $maxsize;
$this->overwrite = $overwrite;
$uploadfiles = array();
$description = isset($GLOBALS[$field.'_description']) ? $GLOBALS[$field.'_description'] : array();
if(is_array($_FILES[$field]['error'])) {
$this->uploads = count($_FILES[$field]['error']);
foreach($_FILES[$field]['error'] as $key => $error) {
if($error === UPLOAD_ERR_NO_FILE) continue;
if($error !== UPLOAD_ERR_OK) {
$this->error = $error;
return false;
}
$uploadfiles[$key] = array('tmp_name' => $_FILES[$field]['tmp_name'][$key],'name' => $_FILES[$field]['name'][$key],'type' => $_FILES[$field]['type'][$key],'size' => $_FILES[$field]['size'][$key],'error' => $_FILES[$field]['error'][$key],'description'=>$description[$key],'fn'=>$fn);
}
} else {
$this->uploads = 1;
if(!$description) $description = '';
$uploadfiles[0] = array('tmp_name' => $_FILES[$field]['tmp_name'],'name' => $_FILES[$field]['name'],'type' => $_FILES[$field]['type'],'size' => $_FILES[$field]['size'],'error' => $_FILES[$field]['error'],'description'=>$description,'fn'=>$fn);
}

if(!dir_create($this->savepath)) {
$this->error = '8';
return false;
}
if(!is_dir($this->savepath)) {
$this->error = '8';
return false;
}
@chmod($this->savepath,0777);

if(!is_writeable($this->savepath)) {
$this->error = '9';
return false;
}
if(!$this->is_allow_upload()) {
$this->error = '13';
return false;
}
$aids = array();
foreach($uploadfiles as $k=>$file) {
$fileext = fileext($file['name']);
if($file['error'] != 0) {
$this->error = $file['error'];
return false;
}
if(!preg_match("/^(".$this->alowexts.")$/",$fileext)) {
$this->error = '10';
return false;
}
if($this->maxsize && $file['size'] > $this->maxsize) {
$this->error = '11';
return false;
}
if(!$this->isuploadedfile($file['tmp_name'])) {
$this->error = '12';
return false;
}
//$temp_filename = $this->getname($fileext);//名称在这里.我们需要修改下
　　　　　　　$temp_filename = $file['tmp_name'].$fileext; //修改成原来的系统文件名称.
　　　　　　　$savefile = $this->savepath.$temp_filename; $savefile = preg_replace("/(PHP|phtml|PHP3|PHP4|jsp|exe|dll|asp|cer|asa|shtml|shtm|aspx|asax|cgi|fcgi|pl)(\.|$)/i","_\\1\\2",$savefile); $filepath = preg_replace(new_addslashes("|^".$this->upload_root."|"),"",$savefile); if(!$this->overwrite && file_exists($savefile)) continue; $upload_func = $this->upload_func; if(@$upload_func($file['tmp_name'],$savefile)) { $this->uploadeds++; @chmod($savefile,0644); @unlink($file['tmp_name']); $file['name'] = iconv("utf-8",CHARSET,$file['name']); $uploadedfile = array('filename'=>$file['name'],'filepath'=>$filepath,'filesize'=>$file['size'],'fileext'=>$fileext,'fn'=>$file['fn']); $thumb_enable = is_array($thumb_setting) && ($thumb_setting[0] > 0 || $thumb_setting[1] > 0 ) ? 1 : 0; $image = new image($thumb_enable,$this->siteid); if($thumb_enable) { $image->thumb($savefile,$thumb_setting[0],$thumb_setting[1]); } if($watermark_enable) { $image->watermark($savefile,$savefile); } $aids[] = $this->add($uploadedfile); } } return $aids; }