Modify my PHP code so it parses XML to display result after searching to find it

Not sure anyone would be able to help me but I have this code which pulls data from an XML feed.

 <?php
 if (!empty($_GET['pin']))
 {
$feedURL = 'http://ift.tt/1yHZCXk';
$showOpsWithNoPics = false;

try
{
    $xml = simplexml_load_file($feedURL . '?' . time());
    $readers = $xml->xpath('/ReaderDetails/Reader[Pin="' . $_GET['pin'] . '"]');

    foreach ($readers as $reader)
    {
        if ($reader->Picture == 'None' && $showOpsWithNoPics == false)
        {
            $picture = '';
        }
        elseif ($reader->Picture == 'None' && $showOpsWithNoPics == true)
        {
            $picture = 'images/defaultpic.jpg';
        }
        else
        {
            $picture = $reader->Picture;
        }

        if ($picture != '')
        {
            $name = $reader->Name;
            $pin = $reader->Pin;
            $status = $reader->Status;
            $description = $reader->Description;

            $arr_skills = '';
            $arr_subjects = '';
            foreach ($reader->Categories->Category as $Category)
            {
                foreach ($Category->Skill as $Skill)
                {
                    switch ($Category['name'])
                    {
                        case 'Skills':
                            $arr_skills .= "<li>$Skill</li>";
                            break;
                        case 'Subjects':
                            $arr_subjects .= "<li>$Skill</li>";
                            break;
                    }
                }
            }

            $arr_shift = '';
            $hourWidth = 20;
            $PreviousDate = ""; 
            foreach ($reader->Rota->Shift as $Shift)
            {
                $Date = $Shift['Date'];
                $Day = date("l", strtotime($Date));
                $Start = $Shift['Start'];
                $Stop = $Shift['Stop'];
                if($Stop == '23:59:59' || $Stop == '00:00:00' ){$Stop = '24:00:00';}

                $Left = date("H",strtotime($Date.' '.$Start)) * $hourWidth;
                $Width = (round(abs(strtotime($Date.' '.$Stop) - strtotime($Date.' '.$Start)) / 60,2)/60)*$hourWidth;



                $compare = strcmp ($PreviousDate, $Date);


                if ($compare != 0)
                {
                    if ($PreviousDate != '')
                    {
                        //this is not the first loop so close off the previous dayrow and hours divs
                        $arr_shift.= '</div></div>';
                    }
                    //create a new day row
                    $arr_shift .= '<div class="dayrow">';
                    $arr_shift .= '<div class="day">'.$Day.'</div>';
                    $arr_shift .= '<div class="hours">';
                }
                //add the shift object
                $arr_shift .= '<div class="shift" title="'. substr($Start,0,5).'-'.substr($Stop,0,5) .'" style="left:'.$Left.'px; width:'.$Width.'px; opacity: 1;"></div>';
                //set previouse date to the current shift's date so that we can check if we need to create a new day row next loop
                $PreviousDate = $Date;
            }
            //now we have finshed looping the shifts, either close the last div or display a message to show
            //we have no schedule for the op
            if ($Date != "")
    {
                $arr_shift.= '</div></div>';
    }
    else
    {
                $arr_shift.= 'We are sorry but they have not scheduled their hours this week. Email for further details.';
    }
        }
    }
}
catch (Exception $e)
{
    echo 'cannot display operator profile';
}
 }

 ?>

I put this in my tag. What I want to do is go have a PHP code that displays results for a specific reader without referring to the URL (right now it bases it on the URL example http://ift.tt/1rqTGRI - will return all the information for 1001).

Does anyone with PHP background know what I need to do to have it so I can paste this code in my header with a set PIN number (so I can make a page specific for each one) and then it'll return THOSE results back so I can echo the other bits like $picture etc?

So in a TL/DR way:

1) Search XML for a PIN number 2) Return the other variables like $name 3) I then echo statement the returned variables

I think it's something to do with this line but I cannot seem to make it work:

$readers = $xml->xpath('/ReaderDetails/Reader[Pin="' . $_GET['PIN'] . '"]');