Question

我创建了一个网站，您可以在单击提交按钮后将单选按钮数据插入数据库。

然而，问题是每当我点击提交按钮时，它会插入两个重复的值而不是一个。

我的代码如下：

<form action="test.php" method ="post" >
<b> what is you fav sport ؟ </b> 
</br>
<input type="radio" name="sport1" value="football"> football
<input type="radio" name="sport1" value="basketball"> football
<?php
$servername = "";
$username = "";
$password = "";
$dbname = "";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error){
    die("Connection failed: " . $conn->connect_error);
}
mysqli_query($conn, "set names 'utf8'");
?> 
<input type="submit" name="submit" value="submit"/>

<?php
if(isset($_POST['submit'])  && !empty($_POST)){
    $sport1 = $_POST['sport1'];
    $SQL = "INSERT INTO userTable (user_q1) VALUES ('$sport1')";
    $result = mysqli_query($conn, $SQL);
    if ($conn->query($SQL) === TRUE) {
        echo "New record created successfully";
    }else{
        echo "Error: " . $SQL . "<br>" . $conn->error;
    }
    $conn->close();
}
?>
</form>

任何帮助将不胜感激。

Answer 1

你正在两次做同样的事情只需使用

$result = mysqli_query($conn, $SQL) 
//or
$conn->query($SQL)

mysqli_query和$ conn-＆gt; query（）用于相同目的。

只需删除任何一个声明，即可获得所需内容

php mysqli插入重复值

1 个答案: