GET and XMLHttpRequest
- by Neethusha
i have an XMLHttpRequest.The request passes a parameter to my php server code in /var/www. But i cannot seem to be able to extract the parameter back at the server side. below i have pasted both the codes:
javascript:
function getUsers(u)
{
alert(u);//here u is 'http://start.ubuntu.com/9.10'
xmlhttp=new XMLHttpRequest();
var url="http://localhost/servercode.php"+"?q="+u;
xmlhttp.onreadystatechange= useHttpResponse;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}
function useHttpResponse()
{
if (xmlhttp.readyState==4 )
{
var response = eval('('+xmlhttp.responseText+')');
for(i=0;i<response.Users.length;i++)
alert(response.Users[i].UserId);
}
}
servercode.php:
<?php
$q=$_GET["q"];
//$q="http://start.ubuntu.com/9.10";
$con=mysql_connect("localhost","root","blaze");
if(!$con)
{die('could not connect to database'.mysql.error());
}
mysql_select_db("BLAZE",$con) or die("No such Db");
$result=mysql_query("SELECT * FROM USERURL WHERE URL='$q'");
if($result == null)
echo 'nobody online';
else
{
header('Content-type: text/html');
echo "{\"Users\":[";
while($row=mysql_fetch_array($result))
{
echo '{"UserId":"'.$row[UsrID].'"},';
}
echo "]}";
}
mysql_close($con);
?>
this is not giving the required result...although the commented statement , where the variable is assigned explicitly the value of the argument works...it alerts me the required output...but somehow the GET method's parameter is not reaching my php or thats how i think it is....pls help....
