Can You Load An Image In PHP Imagestring?

[Obsidian Age]

Heya, just wondering if it is somehow possible to load an image into an imagestring. It's for an API that returns basic details about players in Halo: Reach. The code is:

<?php
$image = imagecreatefrompng("black.png");
$text_color = imagecolorallocate($image, 255, 255, 255);
$apiKey = '**************************************';
if(!empty($_POST['gamertag']))
$playerGamertag = $_POST['gamertag'];
$url = 'http://www.bungie.net/api/reach/reachapijson.svc/player/details/nostats/' . rawurlencode($apiKey) . '/' . rawurlencode($playerGamertag);
$output = file_get_contents($url);
$obj = json_decode($output);
$data = json_decode($output,true);
if(!$obj->Player)
die("\nPlayer not found...");
imagestring($image,5,1,1, $playerGamertag, $text_color); // Size, X, Y
imagestring($image,5,1,15, sprintf("Service Tag: %s", $obj->Player->service_tag), $text_color);
imagestring($image,5,1,30, sprintf("Total Games Played: %d", $obj->Player->games_total), $text_color);
imagestring($image,5,1,45, sprintf("Campaign Progress (Single Player): %s", $obj->Player->CampaignProgressSp), $text_color);
imagestring($image,5,1,60, sprintf("Campaign Progress (Co-Op): %s", $obj->Player->CampaignProgressCoop), $text_color);
imagestring($image,5,1,75, sprintf("Armory Progress: %2d%%", $obj->Player->armor_completion_percentage), $text_color);
imagestring($image,5,1,90, sprintf("Commendation Progress: %2d%%", $obj->Player->commendation_completion_percentage), $text_color);
imagestring($image,5,1,105, sprintf("Daily Challnges Completed: %d", $obj->Player->daily_challenges_completed), $text_color);
imagestring($image,5,1,120, sprintf("Weekly Challenges Completed: %d", $obj->Player->weekly_challenges_completed), $text_color);

//NOT WORKING
imagestring($image,5,1,135, $obj->PlayerModelUrl, $text_color);

header("Content-type: image/png");
imagepng($image);
?>

Bonus points if you can tell me why my two percentage fields aren't outputting correctly! (%2d%%)