php代码如下：
<?php
header('content-type: application/json');
header('content-type: text/html;charset=utf-8');
$email = $_get['email'];
$user = [];
$conn = @mysql_connect("localhost","test","123456") or die("failed in connecting database");
mysql_select_db("test",$conn);
mysql_query("set names 'utf-8'");
$query = "select * from userinformation where email = '".$email."'";
$result = mysql_query($query);
if (null == ($row = mysql_fetch_array($result))) {
echo $_get['callback']."(no such user)";
} else {
$user['email'] = $email;
$user['nickname'] = $row['nickname'];
$user['portrait'] = $row['portrait'];
echo $_get['callback']."(".json_encode($user).")";
}
?>
js代码如下：
<script>
$.ajax({
url: "http://test.localhost/userinterfaceforchatroom/userinformation.php?email=pshuyue@gmail.com",
type: "get",
datatype: 'jsonp',
// crossdomain: true,
success: function (result) {
// data = $.parsejson(result);
// alert(data.nickname);
alert(result.nickname);
}
});
</script>
其中遇到了两个问题：
1、第一个问题：
uncaught syntaxerror: unexpected token :
解决方案如下：
this has just happened to me, and the reason was none of the reasons above. i was using the jquery command getjson and adding callback=? to use jsonp (as i needed to go cross-domain), and returning the json code {"foo":"bar"} and getting the error.
this is because i should have included the callback data, something like jquery17209314005577471107_1335958194322({"foo":"bar"})
here is the php code i used to achieve this, which degrades if json (without a callback) is used:
$ret['foo'] = "bar";
finish();
function finish() {
header("content-type:application/json");
if ($_get['callback']) {
print $_get['callback']."(";
}
print json_encode($globals['ret']);
if ($_get['callback']) {
print ")";
}
exit;
}
hopefully that will help someone in the future.
2、第二个问题：
解析json数据。从上面的javascript中可以看到，我没有使用jquery.parsejson()这些方法，开始使用这些方法，但是总是会报
vm219:1 uncaught syntaxerror: unexpected token o in json at position 1的错误，后来不用jquery.parsejson()这个方法，反而一切正常。不知为何。
以上这篇ajax调用返回php接口返回json数据的方法(必看篇)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持硕编程。
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