Develop Reference

sending data from $.ajax to php

I am trying to send the username to php using ajax.
Here is my js.
$('#username').blur(function(){
var username = $("#username").val();
$.ajax({
type: "POST",
url: "dbquery.php",
data: username,
success: function(result){
$("#dbdata").html(result);
}
});
});
And here is php.
$value = $_GET['username'];
I know it is about the ajax because everything worked fine when the ajax part was written in pure javascript.

first of all your ajax type is post but you getting value using GET[] This is mistake here.
try this
$('#username').blur(function(){
var username = $("#username").val();
$.ajax({
type: "POST",
url: "dbquery.php",
data: {'username':username},
success: function(result){
$("#dbdata").html(result);
}
}); });
and you have to use this to get value
$value = $_POST['username'];

Send data as an object as $_GET reads associative array of variables passed to the current script via the URL parameters
data: {username:username},

You are using type:"POST" and trying to retrieve the values in GET Array in the PHP code .Change the method to GET
$('#username').blur(function(){
var username = $("#username").val();
$.ajax({
type: "GET",
url: "dbquery.php",
data: username,
success: function(result){
$("#dbdata").html(result);
}
});
});

Use below code
$('#username').blur(function(){
var username = $("#username").val();
var dataString = 'username ='+ encodeURIComponent(username) ;
$.ajax({
type: "POST",
url: "dbquery.php",
data: dataString ,
success: function(result){
$("#dbdata").html(result);
}
});
});

First: You are using POST in ajax. and GET in PHP, which is wrong.
If we use POST then in the PHP file, we use $_POST[”] to get the
value. If we use GET then we use $_GET[]
Second: data is passed as an object as data: {username: username}. This means that if we use $_POST[‘username’] in the PHP file, we will get the value of the username.
Your final code will be
AJAX
$('#username').blur(function(){
var username = $("#username").val();
$.ajax({
type: "POST",
url: "dbquery.php",
data: {username:username},
success: function(result){
$("#dbdata").html(result);
}
});
});
PHP
$value = $_POST['username']

Please pass data as an Object. To access data in PHP you have to use $_POST['username'], $_POST['password'] etc
$('#username').blur(function(){
var data = {
username:$("#username").val(),
password: $("#password").val()
};
$.ajax({
type: "POST",
url: "dbquery.php",
data: data,
success: function(result){
$("#dbdata").html(result);
}
});
})

Why is my JQuery variable not sending to php?

I have a variable which contains data, i'm then using a ajax function to send this variable data to this php file. I'm slightly unsure I can store this variable into php and echo it out. This is the code that I currently have...
var data = 1
// Sending this data via ajax to php file/
$.ajax({
type: 'post',
cache: false ,
url: 'function.php',
data: data,
success: function(data) {
alert ( data );
}
});
This is my php code
$noteone = $_POST['data'];
echo $noteone;
Any help would greatly be appreciated

data of your ajax call should be like below. Hope it will solve your problem.
data: { "data": data }

You also need to set the data type:
var data = 1
// Sending this data via ajax to php file/
$.ajax({
type: 'post',
cache: false ,
url: 'function.php',
data: { "data": data },
dataType: "json", // <---- THIS ONE
success: function(data) {
alert ( data );
}
});

Try this :
var data = 1
// Sending this data via ajax to php file/
$.ajax({
type: 'post',
cache: false ,
url: 'function.php',
data: JSON.stringify(data),
contentType: "application/json",
success: function(data) {
alert ( data );
}
});

PHP requires data to be submitted in key=value format when building $_POST/$_GET. You didn't do that. You only submitted value, so PHP has no key to populate $_POST with. You need to have:
data: { "whatever_you_want": data }
which becomes
$_POST['whatever_you_want']

Sending the array data in jquery get ajax call?

how we can send the Javascript array as a parameter in the ajax get call.
I am working with the API call and i have the API call method that has three parameters and the third one is the array.

You can do like this
demArray = [];
demArray[0] = 'hi';
demArray[1] = 'hello';
$.ajax({
type: "GET",
data: {arrayDem:demArray},
url: "someUrl",
success: function(response){
}
});
Also serialize() & serializeArray() can help you.

If you are getting those arrays from a form you could:
var form = $('#form').serialize();
$.ajax({
type: "GET",
data: form,
url: "foo.php",
success: function(data){
}
});
Else you could just pass the parameters into data: like:
data: {foo:Array}

How to pass data using jQuery/ Ajax to a URL

How to pass the fetched data using $.get() from a URL to a particular URL with query_string that can be retrieved using $_GET() in PHP. I'm using following but not working. I want to pass the fetched data into following parameter http://example.com/data?data=FETECHED_DATA
<?php
$ip_address=$_SERVER['REMOTE_ADDR'];
echo '<script>
$.get( "http://ipinfo.io/'.$ip_address.'/org", function( data ) {
$.ajax({
type: "GET",
url: "http://example.com/data",
data: data,
success: success,
dataType: dataType
});
});
</script>';?>
Well, don't recommended PHP to fetch and send data

I believe this will do what you want
<?php
$ip_address=$_SERVER['REMOTE_ADDR'];
echo '<script>
$.get("http://ipinfo.io/'.$ip_address.'/org", function(data) {
$.ajax({
type: "GET",
url: "http://example.com/data",
data: {data : data},
success: success,
dataType: dataType
});
});
</script>';?>
the only change is data: data changed to data: {data: data}
that's a lot of data :p
see this cut down mock up, http://jsfiddle.net/cm8o5dk8/ if you have a decent browser that can show you the network "usage" you'll see that the mockup fails trying to GET http://example.com/data?data=AS15169+Google+Inc.%0A - the %0A comes back from ipinfo.io

Thanks it worked
$.get("http://ipinfo.io/8.8.8.8/org", function(data) {
$.ajax({
type: "GET",
url: "http://example.com/data",
data: {data : data},
success: function() {},
dataType: 'json'
});
});

Trouble Accessing Ajax POST variable on Codeigniter end

I'm using jquery to make ajax calls. Basically I don't know how to access the data I'm sending to the server with a post request. I don't know what the variable is called or... something. I don't know!
Ajax functions:
function ajax_client(url, json) {
return $.ajax({
url: url,
type: 'POST',
data: json,
dataType: 'json'
});
}
function gather_records(data, inp_col, fetch_col, limit) {
var json = JSON.stringify({
"ids" : data,
"inp_col" : inp_col,
"fetch_col" : fetch_col,
"limit" : limit
});
return ajax_client(base_url+'ajax_port/gather_records', json);
}
Codeigniter Function:
public function gather_records()
{
$data = json_decode($this->input->post('ids'));
log_message('debug', $data);//null
return json_encode($data);//null :(
}
I'm having no trouble receiving data back from the server here (and accessing with jQuery), my problem is that I can't get the data I'm sending to codeigniter. I'm developing on MAMP if that makes any difference.
I've tried other variable names like,
$this->input->post('data');
$this->input->post('json');
None seem to work.
Thanks very much for any help I can get!

You don't need to do JSON.stringify({..
just pass an object, and everything will be fine. I mean:
function ajax_client(url, json) {
return $.ajax({
url: url,
type: 'POST',
data: json,
dataType: 'json'
});
}
function gather_records(data, inp_col, fetch_col, limit) {
var json = {
"ids" : data,
"inp_col" : inp_col,
"fetch_col" : fetch_col,
"limit" : limit
};
return ajax_client(base_url+'ajax_port/gather_records', json);
}
One more thing. You don't need to json_decode it in your PHP side. Because default contentType in jQuery is 'application/x-www-form-urlencoded; charset=UTF-8'
Change line
$data = json_decode($this->input->post('ids'));
to
$data = $this->input->post('ids');
But if you really want to send JSON, you can add contentType
return $.ajax({
url: url,
type: 'POST',
data: json,
contentType: 'application/json',
dataType: 'json'
});
dataType you have set is "The type of data that you're expecting back from the server." (http://api.jquery.com/jquery.ajax/)