Question

我正在尝试允许用户注册，代码返回时没有任何错误，但我的数据库中没有显示任何内容。我不能为我的生活找出原因。我没有看到任何错误，但也许你们中的一个可以帮助我？

这是完整的php文件：

<?php

require "includes/constants.php";

$conn = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME);

if(isset($_POST['username'])) {
    $username = $_POST['username'];
    $uLength = strlen($username);
}

if ($uLength >= 4 && $uLength <= 15)
{
}
else
{
    die("Your username must be between 4 and 15 characters.");
}

if($username == "")
{
    die("You didn't tell me what to call you! Please enter a username.");
}

if(isset($_POST['pwd'])) {
    $pwd = $_POST['pwd'];
    $pLength = strlen($pwd);
}

if ($pLength >= 6 && $pLength <= 41)
{
}
else
{
    die("Password must be between 6 and 41 characters.");
}

if($pwd == "")
{
    die("Please enter a password and verify it.");
}

if(isset($_POST['pwd_conf'])) {
    $pwd_conf = $_POST['pwd_conf'];
}
if($pwd != $pwd_conf)
{
    die("Ouch! Your passwords don't match! Try again.");
}

if(isset($_POST['email'])) {
    $email = $_POST['email'];
    $email1 = "@";
    $email_check = strpos($email,$email1);
}

$user_check = "SELECT username FROM users WHERE username='$username'";
if($stmt = mysqli_prepare($conn,$user_check)) {
    mysqli_stmt_execute($stmt);

    if(mysqli_stmt_num_rows($stmt) > 0){
        die("Username is already in use!<br>");
    }
}

$query = "INSERT INTO users (username, password, email) VALUES ('$username', '$pwd', '$email')";

if(!$query)
{
    die("Unfortunately, we can't sign you up because we have problems: ".mysql_error());
}
else
{
    header("Location: login.php");
}

?>

Answer 1

您构建了一个查询字符串，但从未永远不执行它...

1. $sql = "INSERT ..."
2. ???
3. come to SO to ask why

另请注意，您正在混合使用mysqli和mysql调用（特别是在定义INSERT查询后调用mysql_error。这两个库不可互换且彼此不兼容

另请注意，虽然你正在使用准备好的陈述（耶！）你完全错误地使用它们（嘘声）并且容易受到SQL injection attacks的攻击。</ p>

Answer 2

你需要在if（！$ query）之前使用mysql_query（）函数别的什么

$result = mysql_query($query);
if(!$result){

为什么我的代码不会在mysql表中填充一行？

2 个答案: