PHP MySQL插入语句不会将数据插入我的数据库

Question

我正在尝试使用以下代码将一些数据插入数据库：

        $username = $_SESSION['user'];
        $naslov = $_POST['naslov'];//name
        $geslo = $_POST['geslo'];//password
        $vsebina = $_POST['vsebina'];//description

        if (trim($_POST['naslov'])=="" || $_POST['geslo']=="" || $_POST['vsebina']==""){
        $status = "<div class='alert-danger'>Fields are empty</div>";
           }
     else{
        $link = open_database_connection();

        echo $username;
        echo $naslov;
        echo $geslo;
        echo $vsebina;

        $sql = "INSERT INTO projects (name, password, description, username) VALUES ('$naslov','$geslo','$vsebina','$username')";
         mysqli_query($link, $sql);

        close_database_connection($link);
        $status = "<div class='alert-success'>Vic je bil dodan.</div>";
        }

回显显示我输入到表单中的值，SQL不会显示任何错误，只是不会将值插入表中。

Answer 1

检查表单方法是否为POST，如果不是，则将代码更改为

     $username = $_SESSION['user'];
    $naslov = $_GET['naslov'];//name
    $geslo = $_GET['geslo'];//password
    $vsebina = $_GET['vsebina'];//description

    if (trim($_GET['naslov'])=="" || $_GET['geslo']=="" || $_GET['vsebina']==""){
    $status = "<div class='alert-danger'>Fields are empty</div>";
       }
 else{
    $link = open_database_connection();

    echo $username;
    echo $naslov;
    echo $geslo;
    echo $vsebina;

    $sql = "INSERT INTO projects (name, password, description, username) VALUES ('$naslov','$geslo','$vsebina','$username')";
     mysqli_query($link, $sql);

    close_database_connection($link);
    $status = "<div class='alert-success'>Vic je bil dodan.</div>";
    }