**它引发错误虽然提交表单,它引发错误
未定义偏移量:用C 0:\ XAMPP \ htdocs中\ test_login \上线add_data.php 10
10号线有$ _ SERVER [ “REQUEST_METHOD” == “POST”] **
<?php
require_once 'mysql_connect.php';
if ($_SERVER["REQUEST_METHOD" == "POST"]) {
if (empty($_POST['username'])) {
echo "Username required.";
}else{
$username = handle_data($_POST['username']);
}
if (empty($_POST['password'])) {
echo "Password required.";
}
else{
$password = handle_data($_POST['password']);
}
if ($_POST['cpassword'] != $_POST['password']) {
echo "Passwords donot match!";
}
if (!is_numeric($_POST['age'])) {
echo "Age must be a number.";
}
$query = "INSERT INTO students(username, password, age) VALUES(?, ?, ?)";
$stmt = mysql_stmt_prepare($conn, $query);
if ($stmt) {
mysqli_stmt_bind_param($stmt, 'ssi', $username, $password, $age);
mysqli_execute($stmt);
echo "Registration Made!";
mysqli_stmt_close($stmt);
mysqli_close($conn);
}
}
function handle_data($data){
$data = trim($data);
$data = stripcslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
这是什么正指向实际的错误?
可能重复[$ \ _ POST与$ \ _ SERVER \ ['REQUEST \ _METHOD'\] =='POST'](https://stackoverflow.com/questions/409351/post-vs-serverrequest-方法后) – Jenish
可能重复的[参考 - 这是什么意思在PHP?](https://stackoverflow.com/questions/12769982/reference-what-does-this-error-mean-in-php) –
它使用==表示compare来评估''REQUEST_METHOD'=='POST'',因此它返回0,因为它们不相同,所以试图获取$ _SERVER [0]。 –