passing variable - Undefined index error - javascript

I want to pass path variable from js to plus-page.php and then go to that page.
$("#btnpage").click(function(){
path = $('#spantwrap').html();
console.log(path); // works, that's a simple html code.
$.ajax({
url: 'plus-page.php',
type: 'post',
data: {'path': path},
success: function() {
console.log(path);
}
});
location.href = 'plus-page.php';
});
plus-page.php
<form id="form1" action="?" method="post">
<input type="hidden" name="path" value="<?php echo $_POST['path'];?>" // line 46
</form>
Error: Undefined index: path on line 46...

The problem is that you're redirecting immediately, and not passing along the variable in the redirection. Since you redirect immediately, the ajax call that's in-progress never really gets started and is terminated almost immediately.
Just remove your ajax call entirely and set the location like so:
location.href = "plus-page.php?path=" + encodeURIComponent(path);
...and use $_GET['path'] instead of $_POST['path'].
Alternatively, if you really want to do the ajax call first, wait for it to complete before going to the new page:
$.ajax({
url: 'plus-page.php',
type: 'post',
data: {'path': path}, // Side note: The ' here are unnecessary (but harmless)
success: function() {
location.href = 'plus-page.php'; // You might or might not add path here as
// above, it's unclear why you'd do the
// ajax then redirect
console.log(path);
}
});

The solution is of course to get rid of ajax call and just post your form to plus-page.php because it doesn't make any sense in current form
But if you really want to have this logic, i.e passing some variable to second page and redirect to that page later then you should keep the passed value in session and use it later on
<?php
if (isset($_POST['path'])
{
$_SESSION['path'] = $_POST['path'];
// to stop only in case of AJAX call use the following line:
// if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest')
die();
}
?>
<form id="form1" action="?" method="post">
<input type="hidden" name="path" value="<?php echo $_SESSION['path'];?>" // line 46
</form>
Note that this DOESN'T make any sense if you want to redirect immediataly

Try this instead:
$("#btnpage").click(function(){
path = $('#spantwrap').html();
console.log(path); // works, that's a simple html code.
var form = document.createElement("form");
var element1 = document.createElement("input");
form.method = "POST";
form.action = "plus-page.php";
element1.value=path;
element1.name="path";
form.appendChild(element1);
document.body.appendChild(form);
form.submit();
});
This creates a form, adds the path as an input to the form and submits the form.

Related

on form submit using ajax and getting value from php function

I have a form calling submitting as follow
<form action="" method="post" id="member_form" onsubmit="return json_add('member','<?php echo ($admin->getnew_id()); ?>','0','slider_form');">
The problem I have is to get the $new_id before submitting the form from another function class.
this is not working
It keep running the funtion getnew_id() and generate the ID before it is saved
I need the process as follow.
Form Open
User complete form
onsubmit it need to do follow.
a. get new id = $new_d
b. then do
return json_add('member','','0','slider_form');">
I tried the following but dont work
$("form").submit(function(){
$.ajax({
url:"lastid.php",
type:'POST',
success:function(response) {
var $new_id = $.trim(response);
return json_add('member-add',$new_id,'0','slider_form');
alert("Submitted");
}
});
The problem seems to be in the third step.
What you should do is prevent the form from submitting and handle it in ajax.
you need onsubmit="return false" to prevent the form from submitting
Next, handle the submission in ajax
$("form#member_form").submit(function(){
$.ajax({
url: "lastid.php",
type: "POST",
data: { // this is where your form's datas are
"json": json_add('member-add',$new_id,'0','slider_form'),
"key": $("form#member_form").serialize()
},
success: function(response) {
var $new_id = $.trim(response);
alert("Submitted");
// alerting here makes more sense
}
// return json_add('member-add',$new_id,'0','slider_form');
// returning here do nothing!
});
You can read more about using ajax in jQuery here

Post on native php (without framework) Into Code Igniter using AJAX

I'm trying to post data on my HTML code to CI with Ajax. But I got no response?
Here is my JS Code
$(document).ready(function(){
$("#simpan").click(function(){
nama_pelanggan = $("#nama_pelanggan").val();
telp = $("#telp").val();
jQuery.ajax({
type: "POST",
url: "http://192.168.100.100/booking_dev/booking/addBookingViaWeb/",
dataType: 'json',
data : {
"nama_pelanggan":nama_pelanggan,
"telp":telp,
},
success: function(res) {
if (res){
alert(msg);
}
}
});
});
});
And here is my form
<form>
Nama Pelanggan <br>
<input type="text" name="nama_pelanggan" id="nama_pelanggan"><br>
Telepon<br>
<input type="text" name="telp" id="telp"><br>
<input type="button" name="simpan" id="submit" value="Simpan">
</form>
and here is my contoller function code
public function addBookingViaWeb(){
$data = array(
'nama_pelanggan' => $this->input->post('nama_pelanggan'),
'telp'=>$this->input->post('telp')
);
echo json_encode($data);
}
Here is my post param
But I got no response
any idea?
add method in from if you use post then
<form method="post" action ="" >
Try using JQuery form serialize() to declare which data you want to post. It automatically put your form input into ajax data. Example :
first set ID to your form tag
<form id="form">
then
$.ajax({
type:'POST',
url : 'http://192.168.100.100/booking_dev/booking/addBookingViaWeb/',
data:$('#form').serialize(),
dataType:'JSON',
success:function(data){
console.log(data);
}
});
First problem I see is in your ajax submission code. Change
$("#simpan").click(function(){
to
$("#submit").click(function(event){
Notice that I added the event parameter. You now need to prevent the default submission behavior. On the first line of your click method add
event.preventDefault();
Now I'm assuming that your url endpoint http://192.168.100.100/booking_dev/booking/addBookingViaWeb/ can handle POST requests. Usually this is done with something like PHP or Ruby on Rails. If I was doing this in PHP I would write something like the following:
<?php
$arg1 = $_POST["nama_pelanggan"];
$arg2 = $_POST["telp"];
// do something with the arguments
$response = array("a" => $a, "b" => $b);
echo json_encode($response);
?>
I personally don't know anything about handling POST requests with js (as a backend) but what I've given you should get the data over there correctly.
I got solution for my problem from my friend xD
just add header("Access-Control-Allow-Origin: *"); on controller function
Thank you for helping answer my problem.

using POST to send js variable to php from iframe

I am trying to pass a variable from js to a backoffice page.
So far I've tried using a form and submitting it from javascript (but that refreshes the page, which I don't want)
I ditched the form and when for an iframe (so the page doesn't reload everytime the data is submitted). The function is run every few seconds (so the form should be submitting):
<iframe style="visibility:hidden;display:none" action="location.php" method="post" name="location" id="location">
<script>
/*Some other stuff*/
var posSend = document.getElementById("location");
posSend.value = pos;
posSend.form.submit();
</script>
However my php page does not display the value posted (im not quite sure how to actually get the $_POST variable):
<?php
$postion = $_POST['location'];
echo $_POST['posSend'];
echo "this is the";
echo $position;
?>
I also tried $.post as suggested here Using $.post to send JS variables but that didn't work either.
How do I get the $_POST variable value? I cannot use $_SESSION - as the backoffice is a different session. What is the best method to do this?
EDIT I'd rather avoid ajax and jquery
And i think you no need to use form or iframe for this purpose . You just want to know the user onf without refreshing then use the following method with ajax.
index.html the code in this will
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<script>
navigator.geolocation.getCurrentPosition(function(position)
{
pos = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
$.ajax(
{
url:'location.php',
type: 'POST',
datatype: 'json',
data: {'pos':pos}, // post to location.php
success: function(data) {
aler(data);
// success
},
error: function(data) {
alert("There may an error on uploading. Try again later");
},
});
});
</script>
location.php
echo "position :=".$_POST['pos'];
Instead of using iframe to submit your form with out reloading you submit form using ajax call.
$.ajax({
type: "POST",
url: url,
data: $("#formId").serialize(), // This will hold the form data
success: success, // Action to perform on success
dataType: "JSON" or "HTML" or "TEXT" // return type of function
});
There are various alternative to submit the form without reloading the page check here
Thanks
You can use plugin ajaxForm. On action and method you can form options
$(function() {
$('#form_f').ajaxForm({
beforeSubmit: ShowRequest, //show request
success:SubmitSuccesful, //success
error: AjaxError //error
});
});
Lakhan is right, you should try to use ajax instead of an iframe as they cause a lot of issues. If you absolutely need to use an iframe add a target attribute to your form (target the iframe not the main page) and only the iframe will reload.
<form action="action" method="post" target="target_frame">
<!-- input elements here -->
</form>
<iframe name="target_frame" src="" id="target_frame" width="XX" height="YY">
</iframe>
Here's a fully worked example that makes use of a <form>, the FormData object and AJAX to do the submission. It will update the page every 5 seconds. Do note that in PHP, the use of single quotes ( ' ) and double quotes ( " ) is not always interchangeable. If you use single quotes, the contents are printed literally. If you use double-quotes, the content is interpretted if the string contains a variable name. Since I wanted to print the variable name along with the preceding dollar sign ($) I've used single quotes in the php file.
First, the PHP
location.php
<?php
$location = $_POST['location'];
$posSend = $_POST['posSend'];
echo '$location: ' . $location . '<br>';
echo '$posSend: ' . $posSend;
?>
Next, the HTML
index.html
<!DOCTYPE html>
<html>
<head>
<script>
"use strict";
function byId(id,parent){return (parent == undefined ? document : parent).getElementById(id);}
function myAjaxPostForm(url, formElem, successCallback, errorCallback)
{
var ajax = new XMLHttpRequest();
ajax.onreadystatechange = function()
{
if (this.readyState==4 && this.status==200)
successCallback(this);
}
ajax.onerror = function()
{
console.log("AJAX request failed to: " + url);
errorCallback(this);
}
ajax.open("POST", url, true);
var formData = new FormData(formElem);
ajax.send( formData );
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
window.addEventListener('load', onDocLoaded, false);
function onDocLoaded()
{
var submitIntervalHandle = setInterval( doAjaxFormSubmit, 5000 ); // call the function to submit the form every 5 seconds
}
function doAjaxFormSubmit()
{
myAjaxPostForm('location.php', byId('myForm'), onSubmitSuccess, onSubmitError);
function onSubmitSuccess(ajax)
{
byId('ajaxResultTarget').innerHTML = ajax.responseText;
}
function onSubmitError(ajax)
{
byId('ajaxResultTarget').innerHTML = "Sorry, there was an error submitting your request";
}
}
</script>
<style>
</style>
</head>
<body>
<form id='myForm'>
<input name='location'/><br>
<input name='posSend'/><br>
</form>
<hr>
<div id='ajaxResultTarget'>
</div>
</body>
</html>

javascript return from php no updating anything

Hard to explain in the title...
So i have a form which is validated via javascript and an ajax request is sent to a php page which if succesful inputs the data and sets the database response.
However, on the ajax call getting the correct repsonse it doesnt carry out what i wish it to...
I What i want to happen is when the php returns a success JSON return, the .commentsdiv is reloaded.
This doesnt work however. But the comments are added into the database.
here is the code
part of commentsbox div and form:
<div class="commentsbox">
<form class="addcomment" action="process/addcomment.php" method="post">
<input type="hidden" class="postid" name="postid" value="'.$postID.'">
<input type="hidden" class="usernameuser" name="usernameuser" value="'.$usernameuser.'">
<input type="hidden" class="userid" name="userid" value="'.$userid.'">
<input type="text" name="addpostcomment" class="addpostcomment" placeholder="Add Comment..." />
<input type="submit" id="addcommentbutton" value="Post" />
<br />
<br />
</form>
</div>
Here is the javascript:
The viewbuild.php url is dynamic depending on what post is viewed. Do i need it to be like viewbuild.php?id=1 etc? Because that doesnt work niether.
// JavaScript - Edit Post
$(document).ready(function(){
$(".addcomment").submit(function(){
var $targetForm = $(this);
$targetForm.find(".error").remove();
$targetForm.find(".success").remove();
// If there is anything wrong with
// validation we set the check to false
var check = true;
// Get the value of the blog update post
var $comment = $targetForm.find('.addpostcomment'),
newcomment = $comment.val();
// Validation
if (newcomment == '') {
check = false;
$comment.after('<br><br><br><div class="error">Text Is Required</div>');
}
// ... goes after Validation
$.ajax({
type: "POST",
url: "process/addcomment.php",
data: $targetForm.serialize(),
dataType: "json",
success: function(response){
if (response.databaseSuccess) {
$('.commentsbox').load('viewbuild.php');
}
else {
$ckEditor.after('<div class="error">Something went wrong!</div>');
}
}
});
return false;
});
});
Here is part end of php:
$return['databaseSuccess'] = $dbSuccess;
echo json_encode($return);
Any help is most appreciated! :)
Make sure your php response is setting the proper headers. You need to set the content type as "application/json" for JQuery to call the success function. Try adding debugging to the error or complete callbacks when you call the jquery ajax function.
well , why am i thinking that you should check what value the obj returns ..
i mean ..
if(response.databaseSuccess == ??! ) { ... }
Or why don't you just check for the length of the retruned string.
if(response.databaseSuccess.length > 3){ alert('ok');}
One advise bro, if you are returning JUST one parameter .. use e string .. not JSON .. ;)
so, in php you would have :
echo $databaseSuccess;
And in JS .. the IF wil be more simple :
if(response == "ok"){ alert('ok');}
Get it ?
Hope i've helped.

How to prevent jQuery ajax submit form on page

I have two ajax calls on a page. There are text inputs for searching or for returning a result.
The page has several non ajax inputs and the ajax text input is within this . Whenever I hit enter -- to return the ajax call the form submits and refreshes the page prematurely. How do I prevent the ajax from submitting the form when enter is pressed on these inputs? It should just get the results.
However, I cannot do the jquery key press because it needs to run the ajax even if the user tabs to another field. Basically I need this to not submit the full form on the page before the user can even get the ajax results. I read return false would fix this but it has not.
Here is the javascript:
<script type="text/javascript">
$(function() {
$("[id^='product-search']").change(function() {
var myClass = $(this).attr("class");
// getting the value that user typed
var searchString = $("#product-search" + myClass).val();
// forming the queryString
var data = 'productSearch='+ searchString + '&formID=' + myClass;
// if searchString is not empty
if(searchString) {
// ajax call
$.ajax({
type: "POST",
url: "<?php echo $path ?>ajax/product_search.php",
data: data,
beforeSend: function(html) { // this happens before actual call
$("#results" + myClass).html('');
$("#searchresults" + myClass).show();
$(".word").html(searchString);
},
success: function(html){ // this happens after we get results
$("#results" + myClass).show();
$("#results" + myClass).append(html);
}
});
}
return false;
});
$("[id^='inventory-ESN-']").change(function() {
var arr = [<?php
$j = 1;
foreach($checkESNArray as $value){
echo "'$value'";
if(count($checkESNArray) != $j)
echo ", ";
$j++;
}
?>];
var carrier = $(this).attr("class");
var idVersion = $(this).attr("id");
if($.inArray(carrier,arr) > -1) {
// getting the value that user typed
var checkESN = $("#inventory-ESN-" + idVersion).val();
// forming the queryString
var data = 'checkESN='+ checkESN + '&carrier=' + carrier;
// if checkESN is not empty
if(checkESN) {
// ajax call
$.ajax({
type: "POST",
url: "<?php echo $path ?>ajax/checkESN.php",
data: data,
beforeSend: function(html) { // this happens before actual call
$("#esnResults" + idVersion).html('');
},
success: function(html){ // this happens after we get results
$("#esnResults" + idVersion).show();
$("#esnResults" + idVersion).append(html);
}
});
}
}
return false;
});
});
</script>
I would suggest you to bind that ajax call to the submit event of the form and return false at the end, this will prevent triggering default submit function by the browser and only your ajax call will be executed.
UPDATE
I don't know the structure of your HTML, so I will add just a dummy example to make it clear. Let's say we have some form (I guess you have such a form, which submission you tries to prevent)
HTML:
<form id="myForm">
<input id="searchQuery" name="search" />
</form>
JavaScript:
$("#myForm").submit({
// this will preform necessary ajax call and other stuff
productSearch(); // I would suggest also to remove that functionality from
// change event listener and make a separate function to avoid duplicating code
return false;
});
this code will run every time when the form is trying to be submitted (especially when user hits Enter key in the input), will perform necessary ajax call and will return false preventing in that way the for submission.

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