connect_error) { die("连接失败: " . $conn->connect_error); } class Content { public $code = '00'; public $content = '00'; } $content =new Content(); // $sql = "SELECT * FROM `2code_code` WHERE user = '".$u."'"; $sql = "SELECT * FROM `2code_code` WHERE `user` LIKE '".$u."' ORDER BY `id` DESC LIMIT 0 , 30"; $result = $conn->query($sql); $data = array(); if ($result) { while ($row = mysqli_fetch_assoc($result)) { $data[] = $row; } $content->code='1'; $content->content=$data; } else { $content->code='0'; } echo json_encode($content); $conn->close(); ?>