Parameter value not displaying in PHP page using JasperReports

[sruthyms]

I created a report using iReport and displaying in a PHP page. My problem is when I create a parameter and assign it a value, it displays in the preview of iReport but does not display in my PHP page. How can I solve this?

 

My code is

<?php

//Import the PhpJasperLibrary

include_once('PhpJasperLibrary/tcpdf/tcpdf.php');

include_once("PhpJasperLibrary/PHPJasperXML.inc.php");

//database connection details

$server="localhost";

$db="mydb";

$user="root";

$pass="";

$version="0.8b";

$pgport=5432;

$pchartfolder="class/pchart2"; 

//display errors should be off in the php.ini file

ini_set('display_errors', 0);

//setting the path to the created jrxml file

$xml =  simplexml_load_file("report/param1.jrxml");

$PHPJasperXML = new PHPJasperXML();

$PHPJasperXML->arrayParameter=array("acc_id"=>$P{parameter1})‌​);

$PHPJasperXML->xml_dismantle($xml);

$PHPJasperXML->transferDBtoArray($server,$user,$pass,$db);

$PHPJasperXML->outpage("D");    //page output method I:standard output  D:Download file

?>

 

What is the problem in my code.Anybody plz help its very urgent