尝试执行 jQuery AJAX 调用时出现 JavaScript 错误意外标识符
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JavaScript error unexpected identifier when trying to do jQuery AJAX call
提问by Genadinik
I have this jQuery code:
我有这个 jQuery 代码：
<script type="text/javascript">
$(document).ready(function()
{
$('.vote_up').click(function()
{
alert ( "test: " + $(this).attr("data-problem_id") );
problem_id = $(this).attr("data-problem_id");
var dataString = 'problem_id='+ problem_id + '&vote=+';
$.ajax({
type: "POST",
url: "/problems/vote.php",
dataType: "json",
data: dataString,
success: function(json)
{
// ? :)
alert (json);
}
error : function()
{
alert("ajax error");
}
});
//Return false to prevent page navigation
return false;
});
$('.vote_down').click(function()
{
alert("down");
problem_id = $(this).attr("data-problem_id");
var dataString = 'problem_id='+ problem_id + '&vote=-';
//Return false to prevent page navigation
return false;
});
});
</script>
I also have this link HTML:
我也有这个链接 HTML：
<p class="half_text"><?php echo $upvotes; ?> <strong><a class="vote_up" style="color: #295B7B; font-weight:bold;" href="#" data-problem_id="<?php echo $problem_id; ?>">Vote Up</a></strong> | <?php echo $downvotes; ?> <strong><a class="vote_down" style="color: #295B7B; font-weight:bold;" href="#" data-problem_id="<?php echo $problem_id; ?>">Vote Down</a></strong></p>
When I press the link, I get the Javascript console error "Syntax error: unexpected identifier"
当我按下链接时，出现 Javascript 控制台错误“语法错误：意外标识符”
You can reproduce this by clicking on a vote-up link here http://www.problemio.com
您可以通过单击此处的投票链接来重现此问题http://www.problemio.com
Any idea why this is happening and how to fix it?
知道为什么会发生这种情况以及如何解决吗？
回答by hvgotcodes
no comma between your successand errorcallbacks.
您的success和error回调之间没有逗号。
回答by Seano
In my case I was using the wrong syntax on the server side.
就我而言，我在服务器端使用了错误的语法。
Make sure you use:
确保您使用：
return json_encode($result)
return json_encode($result)
instead of
代替
echo json_encode($result)
echo json_encode($result)
