im trying to submit a form on ajax success under if-else statement but it is not working
i dont understand why? see the code below
$.ajax({
type: "POST",
url:'<?php echo base_url() ?>signup/order_validations',
data:$("#orderform").serialize(),
dataType: 'json',
success: function (data) {
if(data.length > 0){
$(".err").html(data);
$(".err").show();
$('html, body').animate({scrollTop: $(".progras-bar-area").offset().top}, 800);
}else{
$("#orderform").submit();
}
},
error:function(){
$(".err").html("Something went wrong...Please try again.");
}
});
Is the back end doing what you expect it to do?
In your signup/order_validations controller, write a simple test:
public function order_validations(){
echo json_encode(array("test"=>"test"));
}
Then, in your AJAX call, try to echo the result:
success: function (data) {
console.debug(data);
alert(data);
}
and check this in your Chrome/Firefox console.
Now you know what you're returning, you should be able to control it properly.
Also, wouldnt it be easier to handle the form submission by sending the data to the back end in your AJAX response rather than submitting it again seperately??
It looks like you are trying to get the length of a json object, which will always return as undefined or 0 because it is not an array.
You can do this to get the count:
var count = Object.keys(data).length;
if(count > 0) {
//your code here
}
There is a lot more detail here: How to list the properties of a JavaScript object
Alternately you can use something like underscore.js. It will allow you to check the size, like so:
_.size(data);
Related
I have a shorthand ajax call that triggers on a selection box change.
<script type'text/javascript'>
$('#selection_project').change(function(event) {
$.post('info.php', { selected: $('#selection_project option:selected').val()},
function(data) {
$('#CTN').html(data);
}
);
});
</script>
It works, but the response from the server is this:
if (isset($_POST['selected']))
$selected = $_POST['selected'];
$results['selected'] = $selected;
$response = json_encode($results);
echo $response;
$results is an associative array with many values from a SQL query.
My question is how do I access any particular element?
I've tried things like
data.selected
or,
data['selected']
I also understand that somewhere in the .post method there should be a statement defining the alternative dataType, such as
'json',
or a
datatype: 'json',
but after lots of searching, not a single example I could find could provide the actual syntax of using alternative dataTypes in the .post method.
I would have just used the .ajax method but after pulling my hair out I cannot figure out why that one isn't working, and .post was, so I just stuck with it.
If someone could give me a little push in the right direction I would appreciate it so much!!
EDIT: Here is my .ajax attempt, can't figure out why it's not working. Maybe i've been staring at it too long.
<script type'text/javascript'>
$('#selection_project').change(function(event) {
$.ajax({
type: 'POST',
url : 'pvnresult.php',
data: { selected: $('#selection_project option:selected').val()},
dataType: 'json',
success: function(data){
$('#CTN').html(data);
}
});
});
</script>
Try to log what exactly returned from info.php. Possible there are no data at all&
$('#selection_project').change(function(event) {
$.post('info.php', {
selected: $('#selection_project option:selected').val()},
function(data) {
console.log(data);
$('#CTN').html(data);
}
);
});
--- Update. Sorry, I can't leave comments
You shold parse your json with JSON.parse before use:
$('#selection_project').change(function(event) {
$.post('info.php', {
selected: $('#selection_project option:selected').val()},
success: function(data){
var result = JSON.parse(data);
$('#CTN').html(data);
}
});
});
Point to note: In your Javascript, you were doing:
dataType: 'json',
success: function(data){
$('#CTN').html(data);
}
This implies, you expect JSON Data - not just plain HTML. Now in your to get your JSON Data as an Object in Javascript you could do:
success: function(data){
if(data){
// GET THAT selected KEY
// HOWEVER, BE AWARE THAT data.selected
// MAY CONTAIN OTHER DATA-STRUCTURES LIKE ARRAYS AND/OR OBJECTS
// IN THAT CASE, TO GET THE EXACT DATA, YOU MAY JUST DO SOMETHING LIKE:
// IF OBJECT:
// $('#CTN').html(data.selected.THE_KEY_YOU_WANT_HERE);
// OR IF ARRAY:
// $('#CTN').html(data.selected['THE_KEY_YOU_WANT_HERE']);
$('#CTN').html(data.selected);
}
}
I wonder how I can pass value from Jquery to PHP. I found similar codes but not even one of them work.
Everytime alert shows value of variable but when I open site there is not any. Var_dump shows that $_POST is null. I am ran out of ideas do you have any?
jQuery code:
$("#password-button").click(function(){
var password="";
var numbers =[0,0,0,0,0,0];
for(var i=0;i<=5;i++){
numbers[i] = Math.floor((Math.random() * 25) + 65);
password += String.fromCharCode(numbers[i]);
}
$(".LoginError").text("Nowe haslo: " + password);
$.ajax({
type: 'post',
url: 'dzialaj.php',
data: {'password': password},
cache:false,
success: function(data)
{
alert(data);
console.log(result)
console.log(result.status);
}
});
});
PHP:
if(isset($_POST['password'])){
$temp = $_POST['password'];
echo $temp;
}
Since it looks like you are new on ajax, let's try something more simple ok? Check this js:
<script>
var string = "my string"; // What i want to pass to php
$.ajax({
type: 'post', // the method (could be GET btw)
url: 'output.php', // The file where my php code is
data: {
'test': string // all variables i want to pass. In this case, only one.
},
success: function(data) { // in case of success get the output, i named data
alert(data); // do something with the output, like an alert
}
});
</script>
Now my output.php
<?php
if(isset($_POST['test'])) { //if i have this post
echo $_POST['test']; // print it
}
So basically i have a js variable and used in my php code. If i need a response i could get it from php and return it to js like the variable data does.
Everything working so far? Great. Now replace the js mentioned above with your current code. Before run the ajax just do an console.log or alert to check if you variable password is what you expect. If it's not, you need to check what's wrong with your js or html code.
Here is a example what i think you are trying to achieve (not sure if i understand correctly)
EDIT
<script>
var hash = "my hash";
$.ajax({
type: 'post',
url: 'output.php',
data: {
'hash': hash },
success: function(data) {
if (data == 'ok') {
alert('All good. Everything saved!');
} else {
alert('something went wrong...');
}
}
});
</script>
Now my output.php
<?php
if(isset($_POST['hash'])) {
//run sql query saving what you need in your db and check if the insert/update was successful;
// im naming my verification $result (a boolean)
if ($result) echo 'ok';
else echo 'error';
}
Since the page won't redirect to the php, you need a response in you ajax to know what was the result of you php code (if was successful or not).
Here is the others answers i mentioned in the coments:
How to redirect through 'POST' method using Javascript?
Send POST data on redirect with Javascript/jQuery?
jQuery - Redirect with post data
Javascript - redirect to a page with POST data
I have checked around, but can't seem to figure out how this is done.
I would like to send form data to PHP to have it processed and inserted into a database (this is working).
Then I would like to send a variable ($selected_moid) back from PHP to a JavaScript function (the same one if possible) so that it can be used again.
function submit_data() {
"use strict";
$.post('insert.php', $('#formName').formSerialize());
$.get('add_host.cgi?moid='.$selected_moid.');
}
Here is my latest attempt, but still getting errors:
PHP:
$get_moid = "
SELECT ID FROM nagios.view_all_monitored_objects
WHERE CoID='$company'
AND MoTypeID='$type'
AND MoName='$name'
AND DNS='$name.$selected_shortname.mon'
AND IP='$ip'
";
while($MonitoredObjectID = mysql_fetch_row($get_moid)){
//Sets MonitoredObjectID for added/edited device.
$Response = $MonitoredObjectID;
if ($logon_choice = '1') {
$Response = $Response'&'$logon_id;
$Response = $Response'&'$logon_pwd;
}
}
echo json_encode($response);
JS:
function submit_data(action, formName) {
"use strict";
$.ajax({
cache: false,
type: 'POST',
url: 'library/plugins/' + action + '.php',
data: $('#' + formName).serialize(),
success: function (response) {
// PROCESS DATA HERE
var resp = $.parseJSON(response);
$.get('/nagios/cgi-bin/add_host.cgi', {moid: resp });
alert('success!');
},
error: function (response) {
//PROCESS HERE FOR FAILURE
alert('failure 'response);
}
});
}
I am going out on a limb on this since your question is not 100% clear. First of all, Javascript AJAX calls are asynchronous, meaning both the $.get and $.post will be call almost simultaneously.
If you are trying to get the response from one and using it in a second call, then you need to nest them in the success function. Since you are using jQuery, take a look at their API to see the arguments your AJAX call can handle (http://api.jquery.com/jQuery.post/)
$.post('insert.php', $('#formName').formSerialize(),function(data){
$.get('add_host.cgi?moid='+data);
});
In your PHP script, after you have updated the database and everything, just echo the data want. Javascript will take the text and put it in the data variable in the success function.
You need to use a callback function to get the returned value.
function submit_data(action, formName) {
"use strict";
$.post('insert.php', $('#' + formName).formSerialize(), function (selected_moid) {
$.get('add_host.cgi', {moid: selected_moid });
});
}
$("ID OF THE SUBMIT BUTTON").click(function() {
$.ajax({
cache: false,
type: 'POST',
url: 'FILE IN HERE FOR PROCESSING',
data: $("ID HERE OF THE FORM").serialize(),
success: function(data) {
// PROCESS DATA HERE
},
error: function(data) {
//PROCESS HERE FOR FAILURE
}
});
return false; //This stops the Button from Actually Preforming
});
Now for the Php
<?php
start_session(); <-- This will make it share the same Session Princables
//error check and soforth use $_POST[] to get everything
$Response = array('success'=>true, 'VAR'=>'DATA'); <--- Success
$Response = array('success'=>false, 'VAR'=>'DATA'); <--- fails
echo json_encode($Response);
?>
I forgot to Mention, this is using JavaScript/jQuery, and ajax to do this.
Example of this as a Function
Var Form_Data = THIS IS THE DATA OF THE FORM;
function YOUR FUNCTION HERE(VARS HERE) {
$.ajax({
cache: false,
type: 'POST',
url: 'FILE IN HERE FOR PROCESSING',
data:Form_Data.serialize(),
success: function(data) {
// PROCESS DATA HERE
},
error: function(data) {
//PROCESS HERE FOR FAILURE
}
});
}
Now you could use this as the Button Click which would also function :3
Is it possible to identify what a page returns when using jquery? I'm submitting a form here using jquery like this:
$("#sform").submit(function() {
$.ajax({
type: "POST",
data: $(this).serialize(),
cache: false,
url: "user_verify.php",
success: function(data) {
$("#form_msg").html(data);
}
});
return false;
});
The user_verify.php page does its usual verification work, and returns error messages or on success adds a user to the db. If its errors its a bunch of error messages or on success its usually "You have successfully signed up". Can I somehow identify using jquery if its errors messages its returning or the success message. So that way if its errors I can use that data in the form, or if its success, I could close the form and display a success message.
Yes, it's this:
success: function(data) {
$("#form_msg").html(data);
}
You can manipulate data in any way you want. You can return a JSON (use dataType) encoded string from server side and process data in the success function
success: function(data) {
if(data->success == 'ok'){
// hide the form, show another hidden div.
}
}
so user_verify.php should print for example:
// .... queries
$dataReturn = array();
$dataReturn['success'] = 'ok';
$dataReturn['additional'] = 'test';
echo json_encode($dataReturn);
die; // to prevent any other prints.
You can make you php return 0 if error so you do something like this inside
success: function(data) {
if(data==0){
//do error procedure
}else{
//do success procedure
}
}
Hope this helps
You can do and something like this:
$.ajax({
type:"POST", //php method
url:'process.php',//where to send data...
cache:'false',//IE FIX
data: data, //what will data contain
//check is data sent successfuly to process.php
//success:function(response){
//alert(response)
//}
success: function(){ //on success do something...
$('.success').delay(2000).fadeIn(1000);
//alert('THX for your mail!');
} //end sucess
}).error(function(){ //if sucess FAILS!! put .error After $.ajax. EXAMPLE :$.ajax({}).error(function(){};
alert('An error occured!!');
$('.thx').hide();
});
//return false prevent Redirection
return false;
});
You can checke the "data" parameter in "success" callback function.
I noticed that there is a problem in your code. Look at this line :
data: $(this).serialize(),
Inside $.ajax jquery method, "this" is bind to the global window object and not $('#sform')
I'm making a site where a user spams a button and increases their score in doing so.
I don't want the page to refresh when the button is clicked, so I wanna use AJAX to send the data to the server. Here's what I have so far:
<script type="text/javascript" src="http://code.jquery.com/jquery-1.4.3.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#update").click(function() {
$.ajax({
type: "POST",
url: "update.php",
data: "increase",
dataType: "Boolean",
success: function(update) {}
});
});
});
</script>
<button id="update" type="button">Button</button>
<div id="counter"></div>
It's not much at all, I know, but I'm very new to this stuff. The main problem I'm having is with the syntax that you're supposed to use. I want the server to return a Boolean variable if the request is successful, so would I have Boolean in the 'Data Type' in inverted commas, apostrophes or what?
Also, I'm struggling with grasping how the ajax script knows whether it's successful. Is there gonna be something in the 'update.php' script that will return a 'TRUE' or 'FALSE' value?
Finally, the data that's gonna be sent to the php file is supposed to tell the php to update the mysql table with the new score. How should I go about telling the php to update the mysql if it receives the data that the ajax is sending?
Thanks a lot
Something along the lines of this should work:
$.ajax({
type: "POST",
url: "update.php",
data: {"action":"increase"},
success: function(response) {
if(response.error) {
alert(response.error);
return;
}
if(response === 'true') {
//do something
} else {
//do something else
}
}
)};
On the PHP end, your code would likely look like this:
<?php
if(!isset($_POST['action'])) {
echo '{"error": "You must provide a action"}';
exit;
}
$action = $_POST['action'];
if(!in_array($action, array('increase', 'decrease')) die('{"error":"invalid parameters"}');
$action = ($action == 'increase') ? ' + 1' : ' - 1';
//$db is assumed to be a live mysqli object from here on out...
$result = $db->query("UPDATE someTable SET fieldname = fieldname {$action} LIMIT 1;");
echo ($result->affected_rows > 0) ? 'true' : 'false';
?>
The dataType attribute is one of json, xml, html, jsonp, text, or script. Boolean isn't one of the expected types. In this case, you don't want to pay attention to those expected types. jQuery makes an intelligent guess about the type if you pass nothing in based on the MIME type returned by your server.
What you want to do is create a function that will be called by the success callback.
$.ajax({
type: "POST",
url: "http://www.server/path/to/update.php",
data: "increase",
success: function(data, status, xhr) {
functionToProcess(new Boolean(data));
}
)};
The function that is given as an argument to success (an anonymous function, in this case) is called when the Ajax call is complete with a 200 value. Because Ajax is asynchronous (that's what the A is), returning things will do you no good. What you want to do is call another function that will process your boolean value. This I've called functionToProcess in my sample code. For more information, check out the jQuery docs on .ajax().
You can learn about what String values in Javascript produce true versus false boolean values here.
This syntax should work
$(document).ready(function(){
$("#update").click(function(){
$.ajax({type: "POST",
url: "update.php",
data: "increase",
success: function(update) {
if(update)
$("#anyelement").html("Thanks");
else
$("#anyelement").html("Try again !");
}
});
});
});
You can ignore the datatype, because you can parse from any direction
how the ajax script knows whether it's successful
If I understand your point, as far as there is a return to the ajax function the process is success, it is upto you to parse the return and implement the logic.
from you php you do like this:
if(you logic is correct){
//update you database and ... other login goes here
return true;
}else{
return false;
}