这款文件上传实用代码,可以方便的上传你指定的文件或图片,同时也可以快速的限制上传图片文件类或大小,实例代码如下:
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- 代码如下 复制代码
- header('content-type:text/html;charset=utf-8');
-
- class image_upload extends fn_function
- {
- private $user_id;
- private $max_file_size;
- private $max_image_side;
- private $destination_folder;
- private $img_preview;
- private $img_preview_size;
- private $cookie_set;
-
- function __construct($user_id,$max_file_size,$max_image_side,$destination_folder,$img_preview,$img_preview_size,$cookie_set)
- {
- $this->user_id=$user_id;
- $this->max_file_size=$max_file_size;
- $this->max_image_side=$max_image_side;
- $this->destination_folder=$destination_folder;
- $this->img_preview=$img_preview;
- $this->img_preview_size=$img_preview_size;
- $this->cookie_set=$cookie_set;
- $this->get_date();
- $this->get_image_type();
- }
-
- private function get_date()
- {
- $this->date=fn_function::get_server_date();
- return $this->date;
- }
-
- function get_image_type()
- {
- $this->up_img_types=array(
- 'image/jpg',
- 'image/jpeg',
- 'image/png',
- 'image/pjpeg',
- 'image/gif',
- 'image/bmp',
- 'image/x-png'
- );
-
- return $this->up_img_types;
- }
-
- function upload_image()
- {
- if ($_server['request_method'] == 'post')
- {
-
- if (!is_uploaded_file($_files["upfile"]["tmp_name"]))
- {
- return $img_unfind=fn_function::alert_msg('图片不存在!');
- exit;
- }
-
- $file = $_files["upfile"];
-
-
- if($this->max_file_size < $file["size"])
- {
- return $img_side_too_big=fn_function::alert_msg('图片大小超过系统允许最大值!');
- exit;
- }
-
-
- if(!in_array($file["type"], $this->up_img_types))
- {
- return $img_type=fn_function::alert_msg('图片类型不符!');
- exit;
- }
-
- if(!file_exists($this->destination_folder))
- {
- if(!fn_function::mkdirs($this->destination_folder))
- {
- return $mkdir_warry=fn_function::alert_msg('目录创建失败!');
- exit;
- }
- }
-
- $file_name=$file["tmp_name"];
- $image_size = getimagesize($file_name);
- $pinfo=pathinfo($file["name"]);
- $file_type=$pinfo['extension'];
- $destination = $this->destination_folder.time().".".$file_type;
- setcookie($this->cookie_set, $destination);
-
- if($image_size[0]>$this->max_image_side || $image_size[1]>$this->max_image_side)
- {
- return $img_side_too_big=fn_function::alert_msg('图片分辨率超过系统允许最大值!');
- exit;
- }
-
- $overwrite="";
- if (file_exists($destination) && $overwrite != true)
- {
- return $img_exist=fn_function::alert_msg('同名文件已经存在了!');
- exit;
- }
-
- if(!move_uploaded_file ($file_name, $destination))
- {
- return $img_move=fn_function::alert_msg('移动文件出错!');
- exit;
- }
-
- $img_upload_sucess="<font color=red face=微软雅黑>上传成功</font><br>";
- if($this->img_preview==1)
- {
- $img_src="<img src="".$destination."" width=".($image_size[0]*$this->img_preview_size)." height=".($image_size[1]*$this->img_preview_size);
- $img_upload_sucess.=$img_src;
- }
- return $img_upload_sucess;
- }
- }
-
- function __destruct()
- {
-
- }
- }
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