我从jQuery中获取错误：
a为空
这是因为我添加了循环遍历json数据的代码：
$(function ()
{
$.ajax({
url: 'ajax_dashboard/api.php', //the script to call to get data
data: "",
dataType: 'json',
success: function(data)
{
$.each(data, function() {
$.each(this, function(k, v) {
$('#output').append("key:"+k+"value:"+v)
.append("
");
});
});
}
});
});
这是php文件(我确实验证了给出的有效JSON格式)：
$query_camera_name = "SELECT camera_name, camera_status, camera_quality, email_notice, camera_hash, camera_type FROM #__cameras WHERE user_id=".$user->id." AND camera_status!='DELETED'";
$db->setQuery($query_camera_name);
//get number of cameras so we can build the table accordingly
$db->query();
$num_rows = $db->getNumRows();
// We can use array names with loadAssocList.
$result_cameras = $db->loadAssocList();
echo json_encode($result_cameras);
?>
这将返回以下json格式的数据：
[
{
"camera_name": "ffgg",
"camera_status": "DISABLED",
"camera_quality": "MEDIUM",
"email_notice": "DISABLED",
"camera_hash": "0d5a57cb75608202e64b834efd6a4667a71f6dee",
"camera_type": "WEBCAM"
},
{
"camera_name": "test",
"camera_status": "ENABLED",
"camera_quality": "HIGH",
"email_notice": "ENABLED",
"camera_hash": "6ab000ef7926b4a182f0f864a0d443fc19a29fdd",
"camera_type": "WEBCAM"
}
]
如果删除循环,“ a为null”错误将消失.我究竟做错了什么？
解决方法:
该错误在其他地方.
编辑：
试试这个来帮助调试.
success: function(data, textStatus, xhr) {
console.log(xhr);
...
}
xhr将包含许多有关发出请求的信息. responseText包含什么？什么是statusText？
标签：json,php,jquery
来源： https://codeday.me/bug/1202/2085323.html
