ajax not working with postgresql

Question

I know is a silly question but I thought I should ask since you guys know more about postgresql. Sorry for being analytical, but I think its the only way to make my question clear.

I'm using postgresql 9.1 /postGIS 2.0 /openlayers/geoserver and apache

I've managed to get a feature's fid when clicked from a vector layer. I edited it using javascript and kept only the number, for example 64.

Then I set this as a value of a hidden html form. Using ajax I m trying to pass this value to a PHP value and perform a query. Openlayers, javascript and ajax work fine but php never gets the value. Here is my code

            function selected_feature(event){
var sf = event.feature.fid;
    var sfs = sf.split(".");
    //that's the number out of fid
    var sff = sfs[1];
    //feed it to the form
    document.getElementById("blahhh").value=sff;
    //alert it-works
    alert(document.getElementById("blahhh").value);
    //call ajax
    loadXMLDoc();
    }


    <!--the form-->
    <form id="hifo" name="hifo" method="post">
    <input type="hidden" id="blahhh" name="blahhh" />
    </form>


    //outside openlayers code
            function loadXMLDoc(){
        var xmlhttp2;
        alert("inside");//works
        var t2lFname=document.getElementById("blahhh").value;
        var parb="blahhh="+t2lFname;

        if (window.XMLHttpRequest)
          {// code for IE7+, Firefox, Chrome, Opera, Safari
          xmlhttp2=new XMLHttpRequest();
          }
        else
          {// code for IE6, IE5
          xmlhttp2=new ActiveXObject("Microsoft.XMLHTTP");
          }
        xmlhttp2.open("POST","map.php",true);
        xmlhttp2.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        xmlhttp2.send(parb);

        xmlhttp2.onreadystatechange=function()
          {
          if (xmlhttp2.readyState==4 && xmlhttp2.status==200)
            {
        alert("suces");//works
            }
          }



//and then php
$blah = $_POST['parb']; 
echo $blah;
 $queryd='
  SELECT
   pins.p_name 
  FROM
    pins
    WHERE
    pins.p_id='.$blah;
 //fetching to fill array
 $resultd=pg_query($conn, $queryd);
 $nord=pg_num_rows($resultd);
 $d=0;
  while($arrayd=pg_fetch_array($resultd)){
      $name[$d]=$arrayd['p_name'];
    $d++;
        echo $arrayd['p_name'];
                echo $arrayd[$d];
        echo $d;
    }

So basically use the fid as an id, via ajax to query the db. All this code is in the same file (named map.php).Problem is php's echos not working and query not working at all. I ve searched the web, I red tutorials and still no luck. Everything works except php. What should I do? Please advise

Thanks

PS I also tried OpenLayers.Request, found here and still no luck