将 Javascript 数组传递给 PHP 文件

2022-01-04 00:00:00 arrays post get php javascript

所以我知道 Javascript 是客户端，PHP 是服务器端，这让事情变得复杂，但我想知道如何去做.

So I know that Javascript is client-side and PHP is server-side and that complicates thing but I'm wondering how to go about doing this.

我的 javascript 代码中有一个数组(在 HTML 文件中)，当用户点击我的提交按钮时，我希望页面将该数组发送到我的 PHP 页面，然后该页面将获取该日期并将其放入 SQL数据库.

I have an array in my javascript code (in a HTML file) and when the user hits my submit button I want the page to send over that array to my PHP page which will then take that date and put it into a SQL database.

有没有简单的方法可以做到这一点?我的数组声明如下 var marker = []; 它只是代码的 javascript 部分中的一个变量.

Is there a simple way to doing this? My array is declared like this var markers = []; it is just a variable in the javascript portion of the code.

我已经查看了很多与此相关的其他帖子，但所有解决方案都不适合我需要做的事情，或者需要对我现在可以做的事情进行太多更改.我不太熟悉 AJAX 或 JSON(不确定那是什么).

I've looked at a bunch of other posts concerning this but all the solutions will not fit what I need to do, or require WAY too much of a change for what I can do right now. I'm not really familiar with AJAX or JSON (not sure exactly what that is).

我的 Javascript 是:

My Javascript is:

var markers = [];

function placeMarker(location) {
        var clickedLocation = new google.maps.LatLng(location);
        var name = document.getElementById("checkname").value;
        var description = document.getElementById("description").value;


        var marker = new google.maps.Marker({
            position: location,
            map: map,
            title: name,
            // This may cause a problem when reloading and editing an existing tour
            // url was found at: http://biostall.com/adding-number-or-letters-to-google-maps-api-markers
            icon: 'http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=' + markerId + '|FE6256|000000'
        });

        marker.setMap(map);
        markers.push([markerId, name, marker.getPosition().lat(), marker.getPosition().lng(), description]);
        //alert("" + markers);
        markerId = markerId + 1;
    }

    google.maps.event.addListener(map, 'click', function(event) {
        placeMarker(event.latLng);
    });

    google.maps.event.addListener(marker, "click", function() {
        map.removeOverlay(marker);
        marker.setMap(map);
    });
} 

window.onload = function() {
    var form = document.getElementById('theform');
    form.addEventListener('submit', function(){
        var markersField = document.getElementById('markers');
        markersField.value = JSON.stringify(markers);
    });
}

我的 HTML 是:

<form action="portal.php" method="post" id="theform">
    <input type="hidden" id="markers" name="markers">
    <button>Submit</button>
</form>

在我的 portal.php 文件中，我有:

In my portal.php file I have:

$markers = json_decode($_POST['markers']);
echo $markers;

即使我知道数组中有元素，php 页面中也没有打印出任何内容，这让我相信数组没有被传递.

Nothing prints out in the php page even though I know there are elements in the array, this leads me to believe the array is not being passed over.

推荐答案

我假设在您提交表单时您的页面已经被重新加载，并且您没有遇到任何问题.如果是这样，您可以为该数据添加一个隐藏字段，并在表单提交之前将其添加到该字段中:

I'm assuming your page is already being reloaded when you submit the form, and that you don't have a problem with that. If so, you can add a hidden field for that data, and add it to the field just before the form submits:

<form method="post" id="theform">
    <!-- your existing form fields -->

    <input type="hidden" id="markers" name="markers">

    <button>Submit</button>
</form>

然后使用这个 JavaScript

Then use this JavaScript

window.onload = function() {
    var form = document.getElementById('myform');
    form.addEventListener('submit', function(){
        var markersField = document.getElementById('markers');
        var markers = [1,2,3];
        markersField.value = JSON.stringify(markers);
    });
}

并将其添加到您的 PHP 中，您可以在其中处理提交的表单数据:

And add this to your PHP, where you handle the submitted form data:

$markers = json_decode($_POST['markers']);

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