使用PHP通过AJAX发送表单，无需刷新页面

Question

So I have this code to POST data with PHP and AJAX without redirecting page, I'm using the same script on the login page. The login page works like a charm but the other pages don't. The only diffeence between these is that login php script page uses if (empty($_POST) === false) {} and the other pages use if (isset($_POST['save-settings'])) {}. I don't know what do to.. Here below is the script I'm using.

HTML BUTTON

<input id="save-settings" class="submit" type="submit" name="save-settings" value="Save" onclick="return false;" />

JS SCRIPT

$(document).ready(function() {
        $("#save-settings").click(function() {
            var name        = $("#webname").val();
            var charset     = $("#webchar").val();
            var meta        = $("#webmeta").val();
            var description = $("#webdesc").val();
            var startsite   = $("#webstartsite").val();
            var starturl    = $("#webstartsiteurl").val();
            var footer      = $("#webfooter").val();

            $.post("../lib/action.php", {
                name: name,
                charset: charset,
                meta: meta,
                description: description,
                startsite: startsite,
                starturl: starturl,
                footer: footer
            }, function(data) {
                $("#gy-main-notification-bar").hide().html("<h1>!</h1><h2>" + data + "</h2>").slideDown(500);
                setTimeout(function() { $("#gy-main-notification-bar").slideUp(500) }, 2500);
            });
        });
    });

PHP SCRIPT

if(isset($_POST['save-settings'])) {
    $updatesettings = "UPDATE `settings` SET
    `name`='".escape($_POST['webname'])."',
    `charset`='".escape($_POST['webchar'])."',
    `meta`='".escape($_POST['webmeta'])."',
    `description`='".escape($_POST['webdesc'])."',
    `startsite`='".escape($_POST['webstartsite'])."',
    `starturl`='".escape($_POST['webstartsiteurl'])."',
    `footer`='".escape($_POST['webfooter'])."'
     WHERE `id`= 1";

     if ($update_settings = $db_connect->query($updatesettings)) {}
     echo 'Success!';
 }

I don't really want to change the isset to empty in the script due the fact that I have all my "onclick" script in one action.php file. When I remove onclick="return:false;" from input it works.. I'm so confused I appriciate any help!

Answer 1

You Forgot to include the post save-settings. You probably should've included it with the ajax post like this:

$.post("../lib/action.php", {
            'name': name,
            'charset': charset,
            'meta': meta,
            'save-settings': true,
            'description': description,
            'startsite': startsite,
            'starturl': starturl,
            'footer': footer
        },

change this in your sql statement for the correct posts

 `name`='".escape($_POST['name'])."',
`charset`='".escape($_POST['charset'])."',
`meta`='".escape($_POST['meta'])."',
`description`='".escape($_POST['description'])."',
`startsite`='".escape($_POST['startsite'])."',
`starturl`='".escape($_POST['starturl'])."',
`footer`='".escape($_POST['footer'])."'
 WHERE `id`= 1";