php - Need to place variable into dynamic URI -

i need place variable $thecompany end of uri voiceuri on twilio. can see below i've managed create variable can't figure how put uri. when submit page voiceuri field in twilio www.ourdomain.com/.xml.

the same true xml file i'm trying create saves $thecompany.xml

the code below, appreciated!

here's line i'm using populate voiceuri in twilio:

'voiceurl' => "http://www.ourdomain.com/$thecompany.xml", 

and here's line i'm using save xml file new name/ same name passed previous twilio

$doc->save('"$thecompany".xml'); 

it's simple isn't normal game, i'm more on infusionsoft side of things code , web guy on honeymoon!

appreciate assistance!

--edit--

thanks answers far, unfortunately don't seem working. here's full code php xml creator:

<?php session_start(); ?> <?php  $thecompany = $_session['company'];      $doc = new domdocument( );     $ele = $doc->createelement( 'root' );     $ele->nodevalue = 'this call $_session["company"] press key accept call';     $doc->appendchild( $ele );     $doc->save("$thecompany.xml"); ?> 

i need getting $thecompany url on buy number php page seen below.

<?php session_start(); ?>  <?php  // line loads library  require('services/twilio.php');  $thecompany = $_session['company'];  $account_sid = 'ac7841a99c892xxxbc8f7xxx';  $auth_token = 'a71cxx052080xx';  $client = new services_twilio($account_sid, $auth_token);   $phonenumber = $client->account->incoming_phone_numbers->create(array(      'phonenumber' => $_session["number"],       'voiceurl' => "http://www.ourdomain.com/"'$thecompany .'".xml",  ));  echo $phonenumber->sid;     ?> 

the pages follow so:

1) have php page find available numbers. page passes information onto php page (code directly above one) 2) page buys number , adds account along voiceuri , once submitted page passes xml creator page

i have feeling should switch buy , xml pages around search number create xml file buy number not sure if matters?

thanks sticking me!

--edit #2--

hi guys, sorry know you're helping best can. i'm still having trouble i'm thinking might best create xml file , pass variable php file sends info twilio. if create xml $doc->save($thecompany.'.xml'); how pass variable next page in place of $doc->save($thecompany.'.xml');?

i think makes more sense create variables add them in place of uri attempting hybrid of static , dynamic.

so i'd looking @ this:

$phonenumber = $client->account->incoming_phone_numbers->create(array(      'phonenumber' => $_session["number"],                     'voiceurl' => $thexml,  ));  

do think that's better option route i'm taking now?

use this

$doc->save($thecompany.".xml");