Develop Reference

Ajax passing value to PHP

I would like to pass multiple values to php via ajax (on same page), here's my code:
HTML (user_list.php):
<button type="submit" class="button button-block savebutton" name="save_changes"/>
Save changes</button>
Javascript (user_list.php):
$(".savebutton").on("click", function (event) {
event.preventDefault();
var js = [];
var i = 0;
$('select').each(function () {
var a = {"id": "", "permission": ""}
a.id = $(this).val();
a.permission = $(this).children(":selected").text();
js.push(a);
alert(js[i].permission + " - "+js[i].id);
i++;
});
$.ajax({
type: "POST",
url: "user_list.php",
data: {result: JSON.stringify(js)}
});
return false;
});
PHP (user_list.php):
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if (isset($_POST['delete_selected'])) { // Button to delete selected user(s)
if (!empty($_POST['check_list'])) {
foreach ($_POST['check_list'] as $id) {
$sql = "DELETE FROM users WHERE id=$id";
$mysqli->query($sql);
header("Refresh:0"); //Refresh page
}
}
}
// Other if above works fine
elseif (isset($_POST['result'])){
// I want to get the js array with the values here after ajax
}
else {
// But I get here, and I don't get the js array
}
}
So I have 2 problems, the first is that I pass the elseif, and the second is that I dont get the array. I think the problem is with ajax, since filling the array works properly
EDIT: I moved the php to a different page, now it's working.

Though your Ajax request is initiated, a "normal" submit request is also started, when you press the button. To prevent the second request (thus keeping only the Ajax request), you have to return false; at the end of your onclick callback.
Solution #1:
$(".savebutton").on("click", function () {
var js = [];
var i = 0;
$('select').each(function () {
var a = {"id": "", "permission": ""}
a.id = $(this).val();
a.permission = $(this).children(":selected").text();
js.push(a);
alert(js[i].permission + " - "+js[i].id);
i++;
});
$.ajax({
type: "POST",
url: "user_list.php",
data: {result: JSON.stringify(js)}
});
return false;
});
Solution #2 (as also suggested by #charlietfl):
$(".savebutton").on("click", function (event) {
event.preventDefault();
var js = [];
var i = 0;
$('select').each(function () {
var a = {"id": "", "permission": ""}
a.id = $(this).val();
a.permission = $(this).children(":selected").text();
js.push(a);
alert(js[i].permission + " - "+js[i].id);
i++;
});
$.ajax({
type: "POST",
url: "user_list.php",
data: {result: JSON.stringify(js)}
});
});

It seems that when you're submitting the POST request, the data is coming as their own POST fields. Simply check for the values of what you submitted. For example, if you had done the same, but put foo as bar and hello as world, you could check for foo and hello with something like this:
elseif (isset($_POST['foo'], $_POST['hello']) {
# your code
}

$('.savebutton').click(function (e) {
e.preventDefault()
var js = []
var i = 0
$('select').each(function (i) {
var a = {}
a.id = $(this).val()
a.permission = $(this).children(':selected').text()
js.push(a)
alert(js[i].permission + ' - ' + js[i].id)
})
js = JSON.stringify(js)
$.post('user_list.php', {result: js}
})

Try with this
<button type="submit" class="button button-block savebutton" name="save_changes[]"/>Save changes</button>

Success message doesn't work [duplicate]

This question already has answers here:
Ajax call is never success
(2 answers)
Closed 5 years ago.
I have a little issue,
I'm working on a contact form,
My problem is that the ajax call doesn't show a success message, it sticks
on "sending"
the call is working because it goes to the PHP page and runs the function from there, so everything works fine expect the success message.
I will really glad for assistance, thanks!
this is the JavaScript page:
var nameRegx = /^[' a-zא-ת]+(\s[' a-zא-ת]+)*$/i,
emailRegx = /^([\w-\.]+#([\w-]+\.)+[\w-]{2,4})$/,
phoneRegx = /^(?:0(?!(5|7))(?:2|3|4|8|9))(?:-?\d){7}$|^(0(?=5|7)(?:-?
\d){9})$/,
td = 'p.text-danger',
sa = '#submitAnimate',
sb = '#submitBtn',
nf = '#name',
ef = '#email',
pf = '#phone',
mf = '#message';
$(sa).hide();
$('#contactForm').on('submit', function (event) {
event.preventDefault();
var isValid = true;
$(td).text('');
$(' input[type="text"], textarea').removeClass('error');
$(sb).attr('disabled', true);
$(sa).show();
var userData = {
name: $(nf).val().trim(),
email: $(ef).val().trim(),
phone: $(pf).val().trim(),
message: $(mf).val().trim()
};
if (userData.name.length < 2 || userData.name.length > 70 ||
!nameRegx.test(userData.name)) {
isValid = false;
setError(nf, 'name');
}
if (!emailRegx.test(userData.email)) {
isValid = false;
setError(ef, 'email');
}
if (!phoneRegx.test(userData.phone)) {
isValid = false;
setError(pf, 'phone');
}
if (userData.message.length < 3) {
isValid = false;
setError(mf, 'message');
}
if (!isValid) {
$(sb).attr('disabled', false);
setTimeout(function(){ $(sa).hide(); }, 500);
} else {
$.ajax({
url: "assets/contact_form/process-contact.php",
type: "POST",
dataType: "html",
data: userData,
beforeSend: function () {
$( sb ).val('Sending...');
},
success: function (response) {
if (response == true) {
successmessage = 'Data was succesfully captured';
$("#gmsg").text(successmessage);//THIS MESSAGE DOESN'T APPEAR
} else {
$( sb ).val('Can not send, please try latter');
}
}
});
}
});
$('input[type="text"], textarea').on('keyup', function () {
$(this).next().text('');
});
function setError(target, field) {
setTimeout(function () {
$(target).val('').addClass('error');
$(target).next().text('* Please enter your ' + field);
}, 500);
}

In success : function(response) the object response is not a Boolean. it is the returned response of the ajax call, it will be a string.
just remove the if(response == true) from your code.
then, it will work fine.

event handler are not working in asynchronous ajax call

i am filling up my dropdowns using this ajax call ..selectItems create select option tags in html using attribute_map
var $el = this.$el(model);
var rule_title = "Job Family: ";
var attribute_map = [];
var current_object = this;
$el.append(this.getRuleTitle(rule_title, model));
jQuery.ajax({
url : "<%= Rails.configuration.url_prefix %>/team/index/get_rule_attribute_values",
type : "GET",
data : { name : "jobFamily" },
dataType : "json",
success : function(data){
var attribute_array = data.value.rule_attribute_values;
attribute_array.sort(function(a,b){
if(a.display_name > b.display_name){
return 1;
}
if(a.display_name < b.display_name){
return -1;
}
return 0;
});
var index = 0;
var obj;
for (obj in attribute_array){
attribute_map[index] = [];
attribute_map[index][0] = attribute_array[index].display_name + " ( " + attribute_array[index].internal_name + " ) " ;
attribute_map[index][1] = attribute_array[index].internal_name;
index++;
}
current_object.selectItems($el,
attribute_map,
"jobFamily", model.jobFamily, {multiple : "multiple", "data-placeholder" : "Add Constraint..."}, "400px");
},
complete : function() {
console.log("completed");
},
error : function(jqXHR, textStatus,errorThrown){
var requestResponse = {
httpStatus: jqXHR.status,
error:jqXHR.statusText,
};
}
});
when i put async as false ..event handler works fine but in synchronous call , the just doesn't do anything
event handler looks like
$('.chosen-select jobFamily').on('change',function(evt, params){
console.log("completeddddddd");
var value = $('.chosen-select jobFamily').val();
console.log(value);
if (value == null) {
// Input is empty, so uncheck the box.
$('.jobFamily').prop("checked", false);
} else {
// Make sure the box is checked.
$('.jobFamily').prop("checked", true);
}
});
});
where '.chosen-select jobFamily' is class of select tag and '.jobFamily' is class of check box ... i have tried writing my jquery inside complete argument of ajax call , i tried writing my jquery inside
$('document).bind('ajaxComplete',function({
//above jquery
});
please help . i have spent more than 2 days on that . all code lies inside ready function.

Is there a way to prevent submitting a form with this javascript/jquery?

I have searched the net, i´ve tried implementing "preventdefaults" and "return false" statements all over the place, but I can´t seem to find a way to prevent this form submitting and reloading the page. It only reloads when the form has been validated. I´m kind of a beginner, but I really tried hard achieving the script to validate a form (which has "post"-method and "#" as action), and make an ajax-call. It´s a school assignment and would be graceful towards any pointers you guys could give.
$(document).ready(function()
{
$("#submit").click(function()
{
var gbname = $("#gbname")[0];
var gbmessage = $("#gbmessage")[0];
formFields = [gbname, gbmessage]
var warning = false;
for (i=0; i<formFields.length; i++)
{
formFields[i].style.backgroundColor = "white";
if (formFields[i].value == "")
{
formFields[i].style.backgroundColor = "red"
$(formFields[i]).bind("keyup", resetBgColor);
$(formFields[i]).bind("change", resetBgColor);
warning = true;
}
}
if (warning == true)
{
alert("Vänligen fyll i fälten korrekt!");
return false;
}
else
{
$.post('ajax.php', {gbname: gbname, gbmessage: gbmessage},
function(data)
{
$("#successmessage").html(data);
$("#successmessage").hide();
$("#successmessage").fadeIn(1500); //Fade in error/success-meddelande
var comment = $("<div class='film2'><p class='names'><b>Namn:</b>" +gbname+ "</p> <p class='messages'><b>Meddelande:</b>" +gbmessage+ "</p></div>");
$("#kommentarer").prepend(comment);
clearForm();
});
return false;
}
return false;
});
});

Your references to the input elements as objects and the data returned from your AJAX call were a bit muddled.
Also incorporated the suggestion of binding to the form's submit event. DEMO
$(document).ready(function () {
function clearForm(){
$('input.reset').each(function(){
$(this).val('');
});
}
$("form").on('submit', function () {
alert('submitted!');
var gbname = $("#gbname");
var gbmessage = $("#gbmessage");
formFields = [gbname[0], gbmessage[0]]
var warning = false;
for (i = 0; i < formFields.length; i++) {
formFields[i].style.backgroundColor = "white";
if (formFields[i].value == "") {
formFields[i].style.backgroundColor = "red"
$(formFields[i]).bind("keyup", resetBgColor);
$(formFields[i]).bind("change", resetBgColor);
warning = true;
}
}
if (warning == true) {
alert("Vänligen fyll i fälten korrekt!");
return false;
} else {
var J = JSON.stringify({
"gbname": gbname.val(),
"gbmessage": gbmessage.val()
});
console.log(J);
$.ajax({
type: "POST",
url: '/echo/json/',
datatype: 'json',
data: {
json: J,
delay: 3
},
success: function (data) {
$("#successmessage").html(data);
$("#successmessage").hide();
$("#successmessage").fadeIn(1500); //Fade in error/success-meddelande
var comment = $("<div class='film2'><p class='names'><b>Namn:</b>" + data.gbname + "</p> <p class='messages'><b>Meddelande:</b>" + data.gbmessage + "</p></div>");
$("#kommentarer").prepend(comment);
clearForm();
} // end success
}); // end ajax
return false;
} // end else
return false;
});
});

I suggest using
$("form").on('submit', function (e) {
[...]
if(validationErrors) {
alert(Errormessage);
e.preventDefault();
}
[...]
instead of returning false.
https://developer.mozilla.org/en-US/docs/DOM/event.preventDefault
In order to get it to work, you have to use the event as a parameter of your callback function.

Callback never called on Jquery.post();

I'm having some trouble using JQUERY Post function.
I have 2 functions that call JQUERY Post function.
Both of them is working fine, but the callback function is never called (handleLike).
When I call handleLike manually, it's works perfect.
(Even if handleLike has just an alert inside, the callback function is not called)
Could you please help me with this thing?
<script type="text/javascript">
$(document).ready(function() {
function handleLike(v_cb){
alert("Call back chamou!");
$('#erro').html(v_cb.mensagem);
if (v_cb.class == 'map'){
var elemento = $('#maplike');
}else{
var elemento = $('#commentlike'+v_cb.id);
}
if (!(elemento.hasClass('disabled'))){
elemento.addClass("disabled");
var likes = elemento.find('font').text();
likes++;
elemento.find('font').html(likes);
}
}
$('#maplike').click(function() {
//var map_id = $('#like').find('font').attr('value');
var id = $(this).attr("name");
if (!($(this).hasClass('disabled'))){
var JSONObject= {
"mensagem":"Testando Json",
"id":86,
"class":"map"
};
handleLike(JSONObject);
alert("Teste");
$.post(
'/cmap/maps/like',
{ id: id },
handleLike,
'json'
);
}
});
$('[id*="commentlike"]').click(function() {
//var map_id = $('#like').find('font').attr('value');
var id = $(this).attr("name");
if (!($(this).hasClass('disabled'))){
$.post(
'/cmap/comments/like',
{ id: id },
handleLike,
'json'
);
}
});
});
</script>

Diagnostic, not solution
Rationalizing and adding an error handler, you should get something like this :
$(document).ready(function() {
function handleLike(v_cb){
alert("Call back chamou!");
$('#erro').html(v_cb.mensagem);
var elemento = (v_cb.class && v_cb.class == 'map') ? $('#maplike') : $('#commentlike'+v_cb.id);
if (!elemento.hasClass('disabled')){
var f = elemento.addClass("disabled").find('font');
f.html(++Number(f.text()));
}
}
function ajaxError(jqXHR, textStatus, errorThrown) {
alert('$.post error: ' + textStatus + ' : ' + errorThrown);
};
$('#maplike').on('click', function() {
var $this = $(this);
if (!$this.hasClass('disabled')) {
$.post('/cmap/maps/like', { id: $this.attr("name") }, handleLike, 'json').fail(ajaxError);
}
});
$('[id*="commentlike"]').on('click', function() {
var $this = $(this);
if (!$this.hasClass('disabled')) {
$.post('/cmap/comments/like', { id: $this.attr("name") }, handleLike, 'json').fail(ajaxError);
}
});
});
untested
Barring mistakes, there's a good chance the error handler will inform you of what's going wrong.

I follow the Kevin B tip and use $ajax method.
It was a parseerror. Sorry.
The return of v_cb was not a json, it was a html. I correct my return, and everything was ok.