php文件图片上传类
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
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header('content-type:text/html;charset=utf-8');
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class image_upload extends fn_function
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{
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private $user_id;
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private $max_file_size;
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private $max_image_side;
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private $destination_folder;
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private $img_preview;
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private $img_preview_size;
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private $cookie_set;
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function __construct($user_id,$max_file_size,$max_image_side,$destination_folder,$img_preview,$img_preview_size,$cookie_set)
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{
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$this->user_id=$user_id;
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$this->max_file_size=$max_file_size;
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$this->max_image_side=$max_image_side;
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$this->destination_folder=$destination_folder;
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$this->img_preview=$img_preview;
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$this->img_preview_size=$img_preview_size;
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$this->cookie_set=$cookie_set;
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$this->get_date();
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$this->get_image_type();
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}
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private function get_date()
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{
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$this->date=fn_function::get_server_date();
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return $this->date;
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}
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function get_image_type()
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{
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$this->up_img_types=array(
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'image/jpg',
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'image/jpeg',
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'image/png',
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'image/pjpeg',
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'image/gif',
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'image/bmp',
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'image/x-png'
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);
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return $this->up_img_types;
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}
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function upload_image()
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{
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if ($_server['request_method'] == 'post')
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{
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if (!is_uploaded_file($_files["upfile"]["tmp_name"]))
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{
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return $img_unfind=fn_function::alert_msg('图片不存在!');
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exit;
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}
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$file = $_files["upfile"];
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if($this->max_file_size < $file["size"])
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{
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return $img_side_too_big=fn_function::alert_msg('图片大小超过系统允许最大值!');
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exit;
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}
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if(!in_array($file["type"], $this->up_img_types))
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{
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return $img_type=fn_function::alert_msg('图片类型不符!');
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exit;
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}
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if(!file_exists($this->destination_folder))
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{
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if(!fn_function::mkdirs($this->destination_folder))
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{
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return $mkdir_warry=fn_function::alert_msg('目录创建失败!');
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exit;
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}
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}
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$file_name=$file["tmp_name"];
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$image_size = getimagesize($file_name);
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$pinfo=pathinfo($file["name"]);
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$file_type=$pinfo['extension'];
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$destination = $this->destination_folder.time().".".$file_type;
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setcookie($this->cookie_set, $destination);
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if($image_size[0]>$this->max_image_side || $image_size[1]>$this->max_image_side)
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{
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return $img_side_too_big=fn_function::alert_msg('图片分辨率超过系统允许最大值!');
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exit;
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}
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$overwrite="";
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if (file_exists($destination) && $overwrite != true)
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{
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return $img_exist=fn_function::alert_msg('同名文件已经存在了!');
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exit;
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}
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if(!move_uploaded_file ($file_name, $destination))
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{
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return $img_move=fn_function::alert_msg('移动文件出错!');
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exit;
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}
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$img_upload_sucess="<font color=red face=微软雅黑>上传成功</font><br>";
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if($this->img_preview==1)
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{
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$img_src="<img src="".$destination."" width=".($image_size[0]*$this->img_preview_size)." height=".($image_size[1]*$this->img_preview_size);
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$img_upload_sucess.=$img_src;
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}
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return $img_upload_sucess;
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}
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}
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function __destruct()
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{
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}
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}