我正在尝试在页面上填充表单。使用下拉选项的ID作为SQL语句中的ID，从MySQL数据库中提取填充表单所需的信息。我想我可以将信息存储在$ _SESSION [＆＃39; formBookings＆＃39;]中，并在刷新时填充表单（这已经发生了，因为我在提交后使用会话变量填充表单
我不能在表单上附上一个提交按钮，因为我已经有一个，老板不想要另一个。我希望表单最终在选择选项时自动刷新页面。如果SQL语句中的数据已存储在会话数组中，则将填充表单。
这是我到目前为止所做的：
JQuery：
<script>
$(document).ready(function(){
$('select[name=recall]').on('change', function() {var recall = $(this).val()
//$(function ()
//{
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({
url: 'recall.php', //the script to call to get data
data: "recall: recall", //you can insert url argumnets here to pass to api.php
//for example "id=5&parent=6"
dataType: 'json', //data format
success: function(data) //on recieve of reply
{
var id = data[0]; //get id
var vname = data[1]; //get name
//--------------------------------------------------------------------
// 3) Update html content
//--------------------------------------------------------------------
$('div#box1').load('DFBristol.html');//html("<b>id: </b>"+id+"<b> name: </b>"+vname); //Set output element html
//recommend reading up on jquery selectors they are awesome
// http://api.jquery.com/category/selectors/
//}
});
});
});
});
</script>
HTML：
<select name='recall' id='recall'>
<option selected></option>
<?php
session_start();
$user = 'root';
$pass = '';
$DBH = new PDO('mysql:host=localhost;dbname=nightlineDB;', $user, $pass);
$DBH->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$DBH->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$recall = $DBH->prepare('SELECT * FROM bookings WHERE dateInputted >= now() - INTERVAL 2 DAY');
$recall->execute();
$recallResult = $recall->fetchALL(PDO::FETCH_ASSOC);
foreach ($recallResult as $key) {
echo '<option id='.$key["ID"].'>'.$key['ID'].' - '.$key['branch'].' - '.$key['title'].' '.$key['firstName'].' '.$key['lastName'].'</option>';
}
?>
</select><br />
SQL文件（recall.php）：
<?php
$user = 'root';
$pass = '';
$DBH = new PDO('mysql:host=localhost;dbname=nightlineDB;', $user, $pass);
$DBH->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$DBH->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$recall = $DBH->prepare("SELECT * FROM bookings WHERE ID = '%$recall%'");
$recall->execute();
$recallFormResult = $recall->fetchALL(PDO::FETCH_ASSOC);
echo json_encode($recallFormResult);
＆GT;
我试图传递变量＆＃39;召回＆＃39;从jquery到使用data参数的SQL语句但没有任何反应。
有人可以帮助我理解我做错了什么以及如何解决它。
答案 0 :(得分：2)
快速浏览一下，到目前为止您发布的代码似乎存在两个问题：
即使$.ajax() defaults to a request type of GET by default，指定它也很不错。您的请求中也存在语法错误 - 您已使用success关闭了});回调，其中}仅为$.ajax({
url: "recall.php",
data: {
recall: recall
},
type: "GET", // Declare type of request (we use GET, the default)
dataType: "json",
success: function(data)
{
var id = data[0];
var vname = data[1];
$('div#box1').load('DFBristol.html');
} // The problematic closure
});
：
jqXHR.success()更好：不使用弃用的.done()函数，而是使用$.ajax({
url: "recall.php",
data: {
recall: recall
},
type: "GET", // Declare type of request (we use GET, the default)
dataType: "json"
}).done(function() {
// Success
var id = data[0],
vname = data[1];
$('div#box1').load('DFBristol.html');
});
promise对象，即：
recall.phprecall.php 当您向$_GET[]发出AJAX GET请求时，该文件需要知道您打算传递哪些变量，而这些变量尚未定义。你可以使用<?php
// Assign the variable $recall with the value of the recall query string from AJAX get request
// I recommend doing a check to see if $_GET['recall'] is defined, e.g.
// if($_GET['recall']) { $recall = $_GET['recall']; }
$recall = $_GET['recall'];
// The rest of your script, unmodified
$user = 'root';
$pass = '';
$DBH = new PDO('mysql:host=localhost;dbname=nightlineDB;', $user, $pass);
$DBH->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$DBH->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$recall = $DBH->prepare("SELECT * FROM bookings WHERE ID = '%$recall%'");
$recall->execute();
$recallFormResult = $recall->fetchALL(PDO::FETCH_ASSOC);
echo json_encode($recallFormResult);
?>
（see doc），即：
$_POST[]注意：但是，如果您选择发出POST请求，则应使用{{1}}（see doc）代替:)