20*1024*1024){ // //echo ""; echo json_encode(array( "status" => "-2", "data"=> $_FILES['file'], "msg" => "文件大小超过20MB!", )); exit(); } //phpinfo函数会以数组的形式返回关于文件路径的信息 //[dirname]:目录路径[basename]:文件名[extension]:文件后缀名[filename]:不包含后缀的文件名 $arr = pathinfo($filename); //获取文件的后缀名 $ext_suffix = $arr['extension']; //设置允许上传文件的后缀 $allow_suffix = array('xls'); //判断上传的文件是否在允许的范围内（后缀）==>白名单判断 if(!in_array($ext_suffix, $allow_suffix)){ //window.history.go(-1)表示返回上一页并刷新页面 //echo ""; echo json_encode(array( "status" => "-1", "rows"=>$arr, "msg" => "仅支持上传文件类型： xls!", )); exit(); } //检测存放上传文件的路径是否存在，如果不存在则新建目录 $uploadDir = __DIR__ . '/../uploads/'; if (!file_exists($uploadDir)){ mkdir($uploadDir); } //为上传的文件新起一个名字，保证更加安全 $new_filename = date('YmdHis',time()).rand(100,1000).'.'.$ext_suffix; //将文件从临时路径移动到磁盘 if (move_uploaded_file($temp_name, $uploadDir.$new_filename)){ //echo ""; echo json_encode(array( "status" => "1", "data"=>$arr, "fpath"=>$uploadDir.$new_filename, "msg" => "File upload success!", )); }else{ //echo ""; echo json_encode(array( "status" => "-1", "data"=>$ext_suffix, "fpath"=>$uploadDir, "file"=>$_FILES['file'], "msg" => "文件上传失败,错误码：$error", "e"=>"error", )); }