将项目从一个div拖动到另一个div时，如何POST到PHP

Question

我有两个带有动态子div的Parentdiv，现在我想在从一侧拖放到另一侧时(双向(实现POST到PHP。

我的Javascript：

function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
console.log('drag', ev.target.id);
ev.dataTransfer.setData("text", ev.target.id);
}
function drop(ev) {
console.log('drop', ev.dataTransfer.getData("text"));
ev.preventDefault();
var data = ev.dataTransfer.getData("text");
ev.target.appendChild(document.getElementById(data));
}

HTML与PHP数据：

<fieldset id="div1" ondrop="drop(event)" ondragover="allowDrop(event)">
<legend style="color:cadetblue; border:white; width:auto; font:bold">Vacant parking spots</legend>
<?php
foreach ($sql_get_vacant_spots_results_ as $row) { ?>
<div id="<?php echo $row; ?>" style="float: left; width: 120px;height: 80px;padding: 10px;border-radius: 20px;margin: 10px;background-color: cadetblue;" draggable="true" ondragstart="drag(event)" width="88" height="31">
<labled style="color: white; font:bold; font-size:large;"><?php echo 'Spot: ' . $row['spot_no'] . ' Gate: ' . $row['parking_gate_id'] ?></label>
</div>
<?php }
?>
</fieldset>
<fieldset id="div2" ondrop="drop(event)" ondragover="allowDrop(event)">
<legend style="color:cadetblue; border:white; width:auto; font:bold">Current parking spots of the customer</legend>
<?php
foreach ($arr_users as $user) { ?>
<div id="<?php echo $user ?>" style="float: left; width: 120px;height: 80px;padding: 10px;border-radius: 20px;margin: 10px;background-color: cadetblue;" draggable="true" width="88" height="31">
<labled style="color: white; font:bold; font-size:large;"><?php echo 'Spot: ' . $user['spot_id'] . ' Gate: ' .  $user['gate_id'] ?></label>
</div>
<?php
} ?>
</fieldset>

现在，主要的问题是，我必须将Array设置为子div的ID，因为我从数据库中获取的元素没有自动递增的(唯一ID(。正如您所看到的，我已经将整个数组附加为idid="<?php echo $user ?>"和id="<?php echo $row; ?>"。

Answer 1

这不是一个答案，只是太多了，无法发表评论。

访问数据集

//REM: Sample structure with three keys
var Rows = [
{key1: 'key1a', key2: 'key2a', key3: 'key3a'},
{key1: 'key1b', key2: 'key2b', key3: 'key3b'},
{key1: 'key1c', key2: 'key2c', key3: 'key3c'}
];
//REM: Having no php here
Rows.forEach(function(item){
document.body.innerHTML += "<div data-x='" + item.key1 + "' onclick = 'alert(this.dataset.x)'>" + JSON.stringify(item) + "</div>"
});

将所有内容都用作JSON

//REM: Sample structure with three keys
var Rows = [
{key1: 'key1a', key2: 'key2a', key3: 'key3a'},
{key1: 'key1b', key2: 'key2b', key3: 'key3b'},
{key1: 'key1c', key2: 'key2c', key3: 'key3c'}
];
//REM: Having no php here
Rows.forEach(function(item){
document.body.innerHTML += "<div data-json='" + JSON.stringify(item) + "' onclick = 'alert(JSON.parse(this.dataset.json).key1)'>" + JSON.stringify(item) + "</div>"
});

我们需要你的实际结构来提出更具体的建议。