我正在上课,我有一个用户设置页面,管理员可以在其中修改设置。
当我点击更新按钮时,我返回此错误:
Call to a member function bind_param() on a non-object
这是我认为错误来源的代码:
<?php
$records = array();
if (!empty($_POST)) {
if (isset($_POST['site_name'], $_POST['header_text'], $_POST['footer_copyright'], $_POST['allow_robot_name'], $_POST['default_robot_name'])) {
$site_name = $_POST['site_name'];
$header_text = $_POST['header_text'];
$footer_copyright = $_POST['footer_copyright'];
$allow_robot_name = $_POST['allow_robot_name'];
$default_robot_name = $_POST['default_robot_name'];
if (!empty($site_name) && !empty($header_text) && !empty($footer_copyright) && !empty($allow_robot_name) && !empty($default_robot_name)) {
$insert = $db->prepare("UPDATE user_settings (site_name, header_text, footer_copyright, allow_robot_name, default_robot_name) VALUES (?, ?, ?, ?, ?)");
$insert->bind_param('sssss', $site_name, $header_text, $footer_copyright, $allow_robot_name, $default_robot_name);
if ($insert->execute()) {
header('Location: index.php');
die();
}
}
}
}
if ($results = $db->query("SELECT * FROM user_settings")) {
if ($results->num_rows) {
while ($row = $results->fetch_object()) {
$records[] = $row;
}
$results->free();
}
}
?>
这是db_connect.php
中的数据库连接代码:
<?php
require_once('../db_config.php');
$db = new mysqli(DB_SERVER, DB_USER, DB_PASS, DB_NAME);
if ($db->connect_errno) {
die('Sorry, we are currently experiencing some problems.');
}
?>
有谁知道我收到此错误的原因?
答案 0 :(得分:2)
您的更新声明可能应该是:
UPDATE user_settings SET site_name = ?, header_text = ?, footer_copyright = ?, allow_robot_name = ?, default_robot_name = ?
通常在更新中,有一些WHERE
条款也是有意义的,但我不知道您的用例到底是什么。