submit form php without refresh page - php

Question

I'm working on a PHP application i want to submit form without refresh page. Actually, i want my php code to be written on the same page as the one containing html and jquery code.
In order to submit form using jquery i've written this code
$(document).ready(function(){
$("#btn").click(function(){
var vname = $("#selectrefuser").val();
$.post("php-opt.php", //Required URL of the page on server
{ // Data Sending With Request To Server
selectrefuser:vname,
},
function(response,status){ // Required Callback Function
//alert("*----Received Data----*\n\nResponse : " + response+"\n\nStatus : " + status);//"response" receives - whatever written in echo of above PHP script.
});
php_lat = <?php echo $resclient_alt; ?>;
php_long = <?php echo $resclient_long; ?>;
var chicago = new google.maps.LatLng(parseFloat(php_lat), parseFloat(php_long));
addMarker(chicago);
//return false;
//e.preventDefault();
//$("#monbutton:hidden").trigger('click');
});
});
and my php code is :
<?php
$resclient_alt = 1;
$resclient_long = 1;
if(isset($_POST['selectrefuser'])){
$client = $_POST['selectrefuser'];
echo $client;
$client_valide = mysql_real_escape_string($client);
$dbprotect = mysql_connect("localhost", "root", "") ;
$query_alt= "SELECT altitude FROM importation_client WHERE nom_client='$client_valide' ";
$query_resclient1_alt=mysql_query($query_alt, $dbprotect);
$row_ss_alt = mysql_fetch_row($query_resclient1_alt);
$resclient_alt = $row_ss_alt[0];
//echo $resclient_alt;
$query_gps= "SELECT longitude FROM importation_client WHERE nom_client='$client_valide' ";
$query_resclient1=mysql_query($query_gps, $dbprotect);
$row_ss_ad = mysql_fetch_row($query_resclient1);
$resclient_long = $row_ss_ad[0];
}
?>
My form is as below
<form id="form1" name="form1" method="post" >
<label>
<select name="selectrefuser" id="selectrefuser">
<?php
$array1_refuser = array();
while (list($key,$value) = each($array_facture_client_refuser)) {
$array1_refuser[$key] = $value;
?>
<option value="0" selected="selected"></option>
<option value="<?php echo $value["client"];?>"> <?php echo $value["client"];?></option>
<?php
}
?>
</select>
</label>
<button id="btn">Send Data</button>
</form>
My code does these actions:
select client get its GPS coordinates
recuperates them in php variable
use them as jquery variable
display marquer on map
So since i do this steps for many clients i don't want my page to refresh.
When i add return false or e.preventDefault the marquer is not displayed, when i remove it the page refresh i can get my marquer but i'll lost it when selecting another client.
is there a way to do this ?
EDIT
I've tried using this code, php_query.php is my current page , but the page still refresh.
$("#btn").click(function(){
var vname = $("#selectrefuser").val();
var data = 'start_date=' + vname;
var update_div = $('#update_div');
$.ajax({
type: 'GET',
url: 'php_query.php',
data: data,
success:function(html){
update_div.html(html);
}
});
Edit
When adding e.preventDfault , this code doesn't seem to work
$( "#monbutton" ).click(function() {
php_lat = <?php echo $resclient_alt; ?>;
php_long = <?php echo $resclient_long; ?>;
$('#myResults').html("je suis "+php_long);
var chicago = new google.maps.LatLng(parseFloat(php_lat), parseFloat(php_long));
addMarker(chicago);
});
This code recuperate this value var vname = $("#selectrefuser").val(); get result from sql query and return it to jquery .

Answer 1

It will refresh since you have not prvent default action of <button> in script
$("#btn").click(function(e){ //pass event
e.preventDefault(); //this will prevent from refresh
var vname = $("#selectrefuser").val();
var data = 'start_date=' + vname;
var update_div = $('#update_div');
$.ajax({
type: 'GET',
url: 'php_query.php',
data: data,
success:function(html){
update_div.html(html);
}
});
Updated
Actually, i want my php code to be written on the same page as the one containing html and jquery code
You can detect the ajax call on php using below snippet
/* AJAX check */
if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
/* special code here */
}