单选按钮在提交右值后未保持选中状态

Question

我不明白为什么在向数据库提交正确的值后，单选按钮没有保持选中状态。我可以在数据库中看到值被正确更新，但是相应的单选按钮是空的。你能帮我一下吗？

 <?php

session_start();

include 'connect_to_database.php';
$tbl_name="members"; // Table name
$db = connect_to_database();

$email = $_SESSION['email'];

// To protect MySQL injection (more detail about MySQL injection)

function add_value_to_members($db, $email, $key, $value)
{
    $new_name=$_POST[$value];
    $new_name = stripslashes($new_name);
    $new_name = mysqli_real_escape_string($db, $new_name);
    if (strlen($new_name) > 0){
        $new_name_sql="UPDATE members SET $key='$new_name' WHERE email='$email'";
        $result=mysqli_query($db, $new_name_sql);
        echo $result;
    }
}

add_value_to_members($db, $email, "gender", "new_gender");

header("Location: ../edit_user.php");
exit();

// html

<div class="form-group">
    <label class="col-lg-3 control-label">Gender</label>
    <div class="col-lg-8">
        <div class="radio">
            <label>
                <input type="radio" name="new_gender" value="male" <?php if (isset($_POST['gender']) && $_POST['gender'] == "male") echo "checked"; ?>> Male
            </label>
        </div>
        <div class="radio">
            <label>
                <input type="radio" name="new_gender" value="female" <?php if(isset($_POST['gender']) && $_POST['gender']=="female" ) echo "checked"; ?>> Female
            </label>
        </div>
    </div>
</div>

Answer 1

您的表单标签在哪里？无论如何，我认为它与发送重定向的头有关，而不是发送post，如果这是您需要的，您可以在更新到数据库后立即将单选按钮值放入会话变量中，并检查会话值的单选按钮标记，或者您可以使用get参数，该参数将发送到头url中。