jQuery的错误:未捕获的类型错误:无法读取未定义的属性“长度” [英] Jquery error: Uncaught TypeError: Cannot read property 'length' of undefined
问题描述
我有一个表格,以AJAX调用后端处理,所有的输入将保存在桌面上并返回成功,以通知用户提交的成功。但是,我的回调过程中面临的一个问题,输入数据可以保存到表中,但回调暂停下面的错误,我不知道是什么出了问题,同样的脚本应用到另一种形式(具有不同的表单字段)工作正常。
控制台日志 - 浏览器:的
未捕获的类型错误:无法读取的未定义的属性长度
m.extend.each
$ .ajax.success
Ĵ
k.fireWith
x
b
火狐的
类型错误:一个是未定义
... rCase()},每个:函数(A,B,C){VAR D,E = 0,F =则为a.length,G = R(A);如果(C){如果(G){为(; F> e,E ...
Firefox的错误指向 F = A
。
脚本:
$(文件)。就绪(函数(){
$(#状态)隐藏()。
$('#btn_submit)。点击(函数(){
VAR PARAMS = $('#project_form')序列化()。
VAR BTN = $(本);
btn.button('装')
$阿贾克斯({
网址:baseURL时+/process_form.php,
键入:POST,
数据:参数,可以
数据类型:JSON,
成功:函数(响应){
如果(response.success =='成功'){
$('#状态)HTML('< B>谢谢< / B>')显示()。
$('HTML,身体)动画({
scrollTop的:$('#顶')偏移()顶部
},500);
}其他{
$('[ID $ =_错误])HTML('')。
$每个(response.error,功能(键,值){
如果(值){
$('#'+键+_error)HTML(值);
}
});
}
},
错误:函数(){
执行console.log(参数);
}
})永远(函数(){
btn.button(复位)
});
});
});
process_form.php
标题(内容类型:应用程序/ JSON);
$ serialized_data =序列化($ _ POST);
$全称= $ mysqli-> real_escape_string(ucwords(用strtolower($ _ POST ['全名'])));
$年龄= $ mysqli-> real_escape_string(ucwords(用strtolower($ _ POST ['年龄'])));
$电子邮件= $ mysqli-> real_escape_string(用strtolower(修剪($ _ POST ['semail'])));
$手机= $ mysqli-> real_escape_string(修剪($ _ POST ['电话']));
$ PROJ_ID = preg_replace('/ [^ 0-9] /','',$ mysqli-> real_escape_string($ _ POST ['PROJECT_ID']));
$ PROJ_NAME = $ mysqli-> real_escape_string(ucwords(用strtolower($ _ POST ['PROJECT_NAME'])));
$ AGENT_ID = preg_replace('/ [^ 0-9] /','',$ mysqli-> real_escape_string($ _ POST ['AGENT_ID']));
$ agent_email = $ mysqli-> real_escape_string(用strtolower(修剪($ _ POST ['agent_email'])));
$ agent_name = $ mysqli-> real_escape_string(ucwords(用strtolower($ _ POST ['agent_name'])));
$验证码= $ _ POST ['captcha_ code'];
$ FUNC =新功能();
$消息=阵列();
//验证
如果(空($全称)||的strlen($全称)2){
$消息['错误'] ['全名'] ='你的名字是必需;
}
如果(空($岁)){
$消息['错误'] ['年龄'] ='您的年龄,需要;
}
如果($功能>!check_email_address($电子邮件)){
$消息['错误'] ['semail'] ='电子邮件地址无效;
}
如果(空($电话)||的strlen($电话)小于10){
$信息[错误] [电话] ='电话NUM是必需的;
}
$ securimage =新Securimage();
$安全code = $ securimage->获得code();
如果(用strtolower($安全code)!=用strtolower($验证码)){
$消息['错误'] ['验证码'] ='不正确的安全code';
}
如果(!使用isset($消息['错误'])){
//插入表格
$创造= $ mysqli->查询(INSERT INTO`xxx` ...)或死亡($ mysqli->错误);
如果($创建){
//发电子邮件
$到= XXX;
$主题='YYY';
$味精='< HTML>
<身体GT;
等等...
< /身体GT;
< / HTML>';
从$ = ZZZ;
$标题='的MIME版本:1.0。 \ r \ N的;
$标题='内容类型:text / html的;字符集= UTF-8。 \ r \ N的;
$标题=发件人:。$全称 <'。$距离。'> 。 \ r \ N的;
如果(电子邮件($到,$主题,$味精,$头)){
$消息['成功'] ='成功';
}
}
}
回声json_en code($消息);
我想这是因为邮件
函数失败,并返回假
这里:
如果(电子邮件($到,$主题,$味精,$头)){
$消息['成功'] ='成功';
}
让你的回应既没有成功
属性,也不错误
属性,这会导致这里的错误:
$。每个(response.error,功能(键,值){
如果(值){
$('#'+键+_error)HTML(值);
}
});
您可以尝试这样的:
如果(电子邮件($到,$主题,$味精,$头)){
$消息['成功'] ='成功';
}其他{
$消息['错误'] ['邮件'] ='邮件的错误!;
}
或者设置 $消息['成功'] ='成功';
后直接将数据保存到表姑邮件成功
I have a form to call ajax for back-end processing, all input will stored in table and will return 'success' to to notify user the submission is success. But I facing an issue during callback, input data can saved into table but the callback is halted with error below, I have no idea what is goes wrong, the same script was applied to another form (with different form field) are working fine.
console log - Chrome:
Uncaught TypeError: Cannot read property 'length' of undefined
m.extend.each
$.ajax.success
j
k.fireWith
x
b
Firefox
TypeError: a is undefined
...rCase()},each:function(a,b,c){var d,e=0,f=a.length,g=r(a);if(c){if(g){for(;f>e;e...
firefox error is pointed to f=a
.
Script:
$(document).ready(function() {
$("#status").hide();
$('#btn_submit').click(function(){
var params = $('#project_form').serialize();
var btn = $(this);
btn.button('loading')
$.ajax({
url: baseurl + '/process_form.php',
type: 'POST',
data: params,
dataType: 'json',
success: function(response){
if(response.success == 'success'){
$('#status').html('<b>Thank you</b>').show();
$('html,body').animate({
scrollTop: $('#top').offset().top
},500);
}else{
$('[id$="_error"]').html('');
$.each(response.error, function(key, value){
if(value){
$('#' + key + '_error').html(value);
}
});
}
},
error: function(){
console.log(arguments);
}
}).always(function(){
btn.button('reset')
});
});
});
process_form.php
header("Content-Type: application/json");
$serialized_data = serialize($_POST);
$fullname = $mysqli->real_escape_string(ucwords(strtolower($_POST['fullname'])));
$age = $mysqli->real_escape_string(ucwords(strtolower($_POST['age'])));
$email = $mysqli->real_escape_string(strtolower(trim($_POST['semail'])));
$phone = $mysqli->real_escape_string(trim($_POST['phone']));
$proj_id = preg_replace('/[^0-9]/', '', $mysqli->real_escape_string($_POST['project_id']));
$proj_name = $mysqli->real_escape_string(ucwords(strtolower($_POST['project_name'])));
$agent_id = preg_replace('/[^0-9]/', '', $mysqli->real_escape_string($_POST['agent_id']));
$agent_email = $mysqli->real_escape_string(strtolower(trim($_POST['agent_email'])));
$agent_name = $mysqli->real_escape_string(ucwords(strtolower($_POST['agent_name'])));
$captcha = $_POST['captcha_code'];
$func = new Functions();
$message = array();
// validate
if(empty($fullname) || strlen($fullname) < 2){
$message['error']['fullname'] = 'Your name is required';
}
if(empty($age)){
$message['error']['age'] = 'Your age is required';
}
if(!$func->check_email_address($email)){
$message['error']['semail'] = 'Invalid email address';
}
if(empty($phone) || strlen($phone) < 10){
$message['error']['phone'] = 'Phone num is required';
}
$securimage = new Securimage();
$securecode = $securimage->getCode();
if(strtolower($securecode) != strtolower($captcha)) {
$message['error']['captcha'] = 'Incorrect security code';
}
if(!isset($message['error'])){
// insert table
$create = $mysqli->query("INSERT INTO `xxx` ...") or die($mysqli->error);
if($create){
//send email
$to = xxx;
$subject = 'yyy';
$msg = '<html>
<body>
blah...
</body>
</html>';
$from = zzz;
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=UTF-8' . "\r\n";
$headers .= 'From: '.$fullname.' <'.$from.'>' . "\r\n";
if(mail($to, $subject, $msg, $headers)){
$message['success'] = 'success';
}
}
}
echo json_encode($message);
I think it is because the mail
function failed, and returned false
here:
if(mail($to, $subject, $msg, $headers)){
$message['success'] = 'success';
}
so your response neither has success
property, nor error
property, and this causes an error here:
$.each(response.error, function(key, value){
if(value){
$('#' + key + '_error').html(value);
}
});
You can try something like:
if(mail($to, $subject, $msg, $headers)){
$message['success'] = 'success';
}else{
$message['error']['mail'] = 'Mail error!';
}
or set $message['success'] = 'success';
directly after saving data into table regardless mail success.
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