- <?php
- /*
- * Ajax 上传类库
- */
- class AjaxUpload {
- private $form_name; //文件form名称
- private $ext_arr; //允许上传的文件后缀
- private $upload_dir; //上传目录
- private $file_size; //文件大小
- public function __construct($form_name, $file_size) {
- //初始化属性
- $this->form_name = $form_name;
- $this->ext_arr = array(
- '.jpg',
- '.png',
- '.gif',
- '.jpeg'
- );
- $this->upload_dir = dirname(__FILE__)."/upload";
- $this->file_size = $file_size;
- $this->upload();
- }
- public function __set($key, $val) {
- $this->$key = $val;
- }
- /**
- * Ajax 无刷新上传图片(jpg|gif|png)
- * @param bool $return_arr 是否返回数组,前提是上传成功
- * @return (array)? || output
- */
- public function upload($return_arr=false) {
- if (!is_dir($this->upload_dir)) mkdir($this->upload_dir, 0777); //上传目录不存在则创建
- $file = $_FILES[$this->form_name];
- if ($file['error']==1 || $file['size']>($this->file_size*1024)) exit('1'); //上传失败,图片不能大于 $this->file_size k!
- switch ($file['error']) {
- case 3:
- exit('3'); //图片只有部分文件被上传,请重新上传!
- break;
- case 4:
- exit('4'); //没有任何文件被上传!
- break;
- }
- $ext = $this->getExt($file['name']);
- if (!in_array($ext, $this->ext_arr)) exit('5'); //非图片类型,请上传jpg|png|gif图片!
- $fname = str_replace('.', '', microtime(true)) . rand(1, 9999) . $ext; //图片名称
- $filename = $this->upload_dir . '/' . $fname;
- if (!move_uploaded_file($file['tmp_name'], $filename)) { //执行上传
- exit('upload error!'); //上传失败,错误未知
- } else {
- $arr = array('ok'=>1, 'filename'=> 'upload/' . $fname, 'size'=>$file['size']);
- if ($return_arr) return $arr;
- else {
- echo json_encode(array('ok'=>$arr['ok'], 'filename'=>$arr['filename'])); exit;
- }
- }
- }
- /**
- * 获取文件后缀名
- * @param string $file_name 文件名称
- * @return string
- */
- private function getExt($file_name) {
- $ext = strtolower(strrchr($file_name, "."));
- return $ext;
- }
- }
- ?>
- //该片段来自于http://www.codesnippet.cn/detail/311020136829.html
来源: http://www.codesnippet.cn/detail/311020136829.html