我一直找不到一个简单的单变量ajax示例，这里的一切对ajax初学者来说都太复杂了。我在YouTube上看了大约4个关于这个话题的视频，但似乎都不太对劲。我有一个像这样的变量中的图像的src。。
<img alt="" src="blah.jpg" style="height: 276px; width: 200px" id="imgClickAndChange1" onclick="changeImage(this)" />
<script language="javascript">
function changeImage(imagePass) {
var num = Math.floor((Math.random() * 48) + 1);
var n = num.toString();
var numImg = n.concat(".jpeg");
var string = "/Images/Folder/"
var final = string.concat(numImg);
imagePass.src = final;
//(this is where I want to pass the variable imagePass.src or "final" to a php script w/ Ajax)
这是我的php脚本：
<?php>
include_once "code.php"; //connecting to database
$s = (this is where I want the variable to be posted);
$temp = explode('/', $s);
$temp2 = explode('.', $temp[count($temp) - 1]); //this is getting the variable I want from the variable sent(which is actually a number)
$float = (int)$temp2; //changing the number (which is a string) to an int
mysql_query("UPDATE Variable SET `upVote` = `upVote`+1 WHERE id= (variable here)) " //Making a row in my database w/ the id of the variable add 1 to the count
?>
我该如何发布和发送这封带有页面刷新的邮件？AJAX真的让我很困惑，所以一个能让我开始这方面工作的实现会很棒，非常感谢。
//假设脚本所在的php页面名为"hello.php"
要使用ajax，请尝试以下操作：
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script type="text/javascript">
function changeImage(imagePass) {
var num = Math.floor((Math.random() * 48) + 1);
var n = num.toString();
var numImg = n.concat(".jpeg");
var string = "/Images/Folder/"
var final = string.concat(numImg);
imagePass.src = final;
$.ajax({
url : 'hello.php',
type: 'post',
data : {'final':final},
success: function()
{
alert('Success!');
}
});
}
</script>
PHP脚本（hello.PHP）：
<?php>
include_once "code.php"; //connecting to database
$s = $_POST['final'];
$temp = explode('/', $s);
$temp2 = explode('.', $temp[count($temp) - 1]); //this is getting the variable I want from the variable sent(which is actually a number)
$float = (int)$temp2; //changing the number (which is a string) to an int
mysql_query("UPDATE Variable SET `upVote` = `upVote`+1 WHERE id= (variable here)) " //Making a row in my database w/ the id of the variable add 1 to the count
?>