javascript - .ajax jquery 方法的正确使用？

Question

我希望请求从sql中删除一条记录而不更改网页。不幸的是，当我单击此按钮时，它实际上并没有删除记录。 post_action.php有什么问题导致删除失败？

post_action.php

 <?php
if($_GET['action'] == "deletePost")
        deletePost($_GET['title'])
function deletePost($title){
    $sql = "DELETE FROM blog WHERE Title = '$title';";
    mysqli_query($mysqli, $sql);
}
?>

Ajax 请求:

$('#deletePost').click(function(){
    $.ajax({
        url:"post_action.php",
        data: {action: "deletePost",  postTitle: $(this).siblings("h3.blog").text()},
        success: function(result){
            $('ul.left').html(result);
        }
    });
});

index.php

<?php
            include 'scripts/db_connect.php';
            include 'scripts/functions.php';
            sec_session_start();
            $sql = "SELECT * FROM blog";
            $result = mysqli_query($mysqli, $sql);
            while($row = mysqli_fetch_array($result))
            {
                echo'<div class="blog"><h3 class="blog">' . $row['Title'] . 
                "</h3><h3>" . $row['Date'] . "</h3><h3>" . $row['Tag'] . 
                "</h3><hr>";
                echo'<p class="blog">' . $row['Body'] . '</p><form name="postForm" 
                method="post" action="process_post.php">
                <input type="radio" name="postAction" 
                value="editPost" class="postButton"  type="button">Edit</input>
                <input type="radio" name="postAction" value="deletePost" 
                class="postButton" type="button">Delete</input>
                <input type="radio" name="postAction" value="commentPost" 
                class="postButton"  type="button">Comment</input>
                </form></div>';
            }

            ?>

Answer 1

问题； 您正在发送数据:

    `data: {action: "deletePost",  postTitle: $(this).siblings("h3.blog").text()}`,

但你正在使用

$_GET['title'] instead use $_GET['postTitle'] 

其次:如果请求成功，则调用成功函数。因此，您可以在其中执行许多操作，例如:

1. show a confirmation box sayin deleted successfully.
2. show a div giving confirmation.
3. remove the deleted row(should be done in all options)