php - 如何在值是变量的表中插入新行？

Question

我正在尝试INSERT使用变量在表中添加一个新行，如下所示-

$name = $_POST['name'];
$surname = $_POST['surname'];
$email = $_POST['email'];
$password = $_POST['password'];
$gender = $_POST['gender'];
if($name && $surname && $email && $password){
    $dbhost = 'localhost';
    $dbuser = 'root';
    $dbpass = '';
    $db = '_erica';
    $conn = new mysqli($dbhost, $dbuser, $dbpass,$db);
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    };

    $sql = 'INSERT INTO login(id, name, surname, email, sex, password) VALUES (Null,$name,$surname,$email,$gender,$password)';

    if ($conn->query($sql) === TRUE) {
        echo "New record created successfully";
    }else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }

}else{
    die('All fields requiret!');
}; 

但它不起作用，我尝试在这样的变量周围添加引号

 $sql = 'INSERT INTO login(id, name, surname, email, sex, password) VALUES(Null,"$name","$surname","$email","$gender","$password")';

还是什么都没有...我能做什么？

Answer 1

用这个。只需将单引号改为双引号即可

$sql = "INSERT INTO login(id, name, surname, email, sex, password) VALUES (Null,$name,$surname,$email,$gender,$password)";