PHP get value from AJAX - php

Question

I had an ajax implementation below and it working fine. Now, how can I get distance and id in toDistance.php? I had my code pasted below and does not add the data into my database. What is wrong?
function getABC(){
for(s=0;s<length;s++){
volunteerlocation = new GLatLng(jlat[s], jlng[s]);
volunteerDist[s] = (Math.round((eventlocation.distanceFrom(volunteerlocation) / 1000)*10)/10);
document.write(volunteerDist[s] + '<br> ');
document.write(jid[s] + '<br> ');
}
alert(Object.prototype.toString.call(volunteerDist));
$.ajax({
type:'POST',
url: 'toDistance.php',
data : ({
distance:volunteerDist,
id:jid
}),
success: function(data){
alert(data);
alert('worked');
},
error :function(jqXHR, textStatus, errorThrown) {
alert(errorThrown);
},
complete : function(){
alert('thanks');
}
});
}
Below is my toDistance.php
<?php
$distance=array();
$volunteerid=array();
if(empty($_GET)){
}
else{
$distance = isset($_GET['distance']) ? $_GET['distance'] : 0;
$volunteerid = isset($_GET['id']) ? $_GET['id'] : 0;
$connect = mysql_connect("localhost","root","");
mysql_select_db("mapping");
for($i=0;$i<$distance.length;$i++){
$updateDistance = mysql_query("
UPDATE volunteerbio
SET volunteerDistance = $distance[$i]
WHERE volunteerID = $volunteerid[$i];
");
}
}
?>

Answer 1

you are sending the data in a POST request, and trying to fetch it in the PHP from $_GET instead of $_POST
another thing:
$distance.length is not php
you need to use
count($distance)
for example:
for ($i=0, $n=count($distance); $i<$n; $i++) { ... }
// instead of running the count() function on every iteration