AJAX不发送参数超过 [英] AJAX not sending parameters over
问题描述
我会开门见山地说。
我有AA列表，显示大家在谁已经证实他们将参加比赛的分贝。我想列表，这取决于组从选择框中选择更改。
I have a a list which shows everyone in the db who has confirmed that they'll be attending a match. I want the list to change depending on what group is chosen from a select box.
这是我到目前为止有： HTML和放大器; AJAX
Here's what I have so far: html & AJAX
<html>
<head>
<script>
function showUser(str) {
if (str == "") {
document.getElementById("attendYes").innerHTML = "";
return;
} else {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("attendingYes").innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open("GET","attending.php?q="+str,true);
xmlhttp.send();
}
}
</script>
</head>
<body>
<form>
<select name="users" onchange="showUser(this.value)">
<option value="">Select a group:</option>
<option value="CMA">CMA</option>
<option value="CM1">CM1</option>
<option value="CP2">CP2</option>
<option value="CBBC">CBBC</option>
</select>
</form>
<br>
<div id="attendYes"><b>Person info will be listed here...</b></div>
</body>
</html>
这里是 attending.php 的选择，就是要发送到页面：
And here is the 'attending.php' page that the choice is meant to be sent to:
<?php
$q = intval($_GET['q']);
$con = mysqli_connect('-----','-----','-----','-----');
if (!$con) {
die('Could not connect: ' . mysqli_error($con));
}
mysqli_select_db($con,"handsomejack_co_forms");
$sql="SELECT * FROM stats WHERE activity='".$q."' AND attend='0' ORDER BY username ASC";
$result = mysqli_query($con,$sql);
echo "<table>
<tr>
<th>User</th>
</tr>";
while($row = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['username'] . "</td>";
echo "</tr>";
}
echo "</table>";
mysqli_close($con);
?>
我已经改变从SQL。$ Q。为定义的选择 - 像CMA - 和它的工作，所以我知道这个问题是来自发送q超过
I have changed the sql from ".$q." to a defined choice - like CMA - and it worked, so I know the issue comes from sending q over.
任何想法可能是什么问题？
Any ideas as to what could be the problem?
干杯。
推荐答案
有<打击>两个三样东西，我建议：
一个。）
更改目标div的ID。你有 attendYes 键，您使用的是 txtHint 。
A.)
Change the id of the target div. as you have attendYes and you are using txtHint.
乙。）@ JS
您可以尝试发送查询的。发送（）如下图所示。
B.) @ js
You can try sending the query in the .send() like below.
xmlhttp.open("GET","attending.php",true);
xmlhttp.send("q=" + encodeURIComponent(str));
C）和@ PHP的：
C.) and @ php:
您不应使用 INTVAL（）虽然我不是很擅长的PHP，但按文件是别的东西。所以我建议你可以改变：
You should not use intval() although i am not very good at php but as per documentation it is something else. so i suggest you to change this:
$q = intval($_GET['q']);
这样：
$q = $_GET['q'];
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