PHP在准备SQL语句时抛出致命错误[重复]
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这个问题在这里已有答案：
在我的php应用程序中，我希望用户能够使用数据库中记录的电子邮件，用户名和号码登录。然而，我
的init.php
<?php
$server = 'localhost';
$username = 'default';
$password = 'xxxx';
$database = 'default';
try{
$conn = new PDO("mysql:host=$server;dbname=$database;", $username, $password);
} catch(PDOException $e){
die( "Connection failed: " . $e->getMessage());
}
的login.php
<?php
session_start();
if(isset($_SESSION['user_name'])!='') {
header('Location: index.php');
}
include_once 'init.php';
//check if form is submitted
if (isset($_POST['login'])) {
$email = $_POST['email'];
$password = $_POST['password'];
$records = $conn->prepare('SELECT username,email,number,password FROM users WHERE username = :login OR email = :login OR number = :login');
$records->bindParam(':login', $email);
$records->execute();
$results = $records->fetch(PDO::FETCH_ASSOC);
$message = '';
if(count($results) > 0 && password_verify($password, $results['password']) ){
$gome = $results['username'];$_SESSION['user_name'] = $gome;
$CookieExpire = 1000;
$time = 100 * 70 * 48 * 86400;
$time = time() + $time;
setcookie('username', '$gome', '$time');
setcookie('password', '$password', '$time');header("Location: /");
} else {
$message = 'Sorry, those credentials do not match';
}
}
?>
在返回中我得到此错误：致命错误：在第11行的prepare()中的非对象上调用成员函数/var/www/u0377863/public_html/xx.com/dom/login.php：
$records = $conn->prepare('SELECT username,email,number,password FROM users WHERE username = :login OR email = :login OR number = :login');
答案
试试这个代码
<?php
session_start();
if(isset($_SESSION['user_name'])!='') {
header('Location: index.php');
}
include_once 'init.php';
//check if form is submitted
if (isset($_POST['login'])) {
$email = $_POST['email'];
$password = $_POST['password'];
$records = $conn->prepare("SELECT username,email,number,password FROM users WHERE ( username='$email' OR email = '$email' OR number = '$email')");
$records->execute();
$results = $records->fetch(PDO::FETCH_ASSOC);
$message = '';
if(count($results) > 0 && password_verify($password, $results['password']) ){
$gome = $results['username'];$_SESSION['user_name'] = $gome;
$CookieExpire = 1000;
$time = 100 * 70 * 48 * 86400;
$time = time() + $time;
setcookie('username', '$gome', '$time');
setcookie('password', '$password', '$time');header("Location: /");
} else {
$message = 'Sorry, those credentials do not match';
}
}
?>另一答案
1）尝试将您的init.php代码移动到login.php，以确保它按预期加载。
2）尝试在“new PDO ..”之前声明全局变量$ conn（global $ conn;），以检查这是否是范围问题。
3）如果前两个步骤没有解决问题，请检查是否已加载pdo（您可以使用https://stackoverflow.com/a/6113469/1277044中列出的功能进行检查）
另一答案
它是变量的范围。
try{
$conn = new PDO("mysql:host=$server;dbname=$database;", $username, $password);
} catch(PDOException $e){
die( "Connection failed: " . $e->getMessage());
}
应该
$conn = null;
try{
$conn = new PDO("mysql:host=$server;dbname=$database;", $username, $password);
} catch(PDOException $e){
die( "Connection failed: " . $e->getMessage());
}
您的$ conn在try块中声明，因此在外部不可见。通过在外面初始化它，它随处可见。
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