Question

我正在尝试将一些PHP变量放入MYSQL数据库中。

知道我的代码哪里出问题了吗？

    $servername = "127.0.0.1";
    $username = "root";
    $password = "";
    $DBname = "questionnaire";
    $conn = new mysqli($servername, $username, $password,$DBname);
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 
    $favisit = mysqli_real_escape_string($conn,$favisit);
    $favanimal = mysqli_real_escape_string($conn,$favanimal);
    $age = mysqli_real_escape_string($conn,$age);
    $area = mysqli_real_escape_string($conn,$area);

    $sql = "USE questionnaire; INSERT INTO info (favVisit, favAnimals, age,area)
    VALUES ('$favisit','$favanimal','$age' ,'$area')";
    if ($conn->query($sql) === TRUE) {
        echo "Inputted";
    } else {
        echo "failed";
    }

Answer 1

该查询不需要USE调查表，因为我已经连接了它

Answer 2

在$ sql中创建字符串时，必须关闭字符串引号才能访问php变量。例如$ string =“ your data'”。$ phpvar。“'; 试试这个：

$servername = "127.0.0.1";
    $username = "root";
    $password = "";
    $DBname = "questionnaire";
    $conn = new mysqli($servername, $username, $password,$DBname);
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 
    $favisit = mysqli_real_escape_string($conn,$favisit);
    $favanimal = mysqli_real_escape_string($conn,$favanimal);
    $age = mysqli_real_escape_string($conn,$age);
    $area = mysqli_real_escape_string($conn,$area);

    $sql = "INSERT INTO info (favVisit, favAnimals, age,area)
    VALUES ('".$favisit."','".$favanimal."','".$age."' ,'".$area."')";
    if ($conn->query($sql) === TRUE) {
        echo "Inputted";
    } else {
        echo "failed";
    }

无法从PHP向MYSQL DB输入变量

2 个答案: