Question

我的代码有问题。我认为这很好，但控制台说它不是：

警告：mysqli_query（）要求参数1为mysqli，在 /home/u772833821/public_html/DB_Functions.php 66
中给出null

以下是代码：

$result = mysqli_query($con, "INSERT INTO users SET (email, username, encrypted_password, salt, created_at) VALUES('$email', '$uname', '$encrypted_password', '$salt', NOW())");

Answer 1

您的查询不正确。请尝试以下方法：

$result = mysqli_query($con, "INSERT INTO users (email, username, encrypted_password, salt, created_at) VALUES('$email', '$uname', '$encrypted_password', '$salt', NOW())");

尝试检查$con是否有效：

$host = "your_host"; // replace these settings for your own
$username = "your_username";
$password = "your_password_if_any";
$db = "your_db_name";
$con = mysqli_connect($host, $username, $password, $db);

if (!$con) {
    echo "Error: Unable to connect to MySQL." . PHP_EOL;
    echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
    echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
    exit;
}

参考文献：

Answer 2

请按照步骤操作，还有一个更正：

1。从INSERT查询中删除SET

$result = mysqli_query($con, "INSERT INTO users (email, username, encrypted_password, salt, created_at) VALUES('$email', '$uname', '$encrypted_password', '$salt', NOW())");

2. 检查连接错误

$con = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_DATABASE);

if (!$con) {
  echo "Error: Unable to connect to MySQL." . PHP_EOL;
  echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
  echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
  exit;
}

也许连接问题。让我知道点 2 的输出是什么。

PHP mysqli_query语法错误

2 个答案: