Apple warranty check script - php

Question

After looking for some Ruby scripts i tried to write on PHP with some help the script.
My Problem is now that I am not sure if the jSon Objects are correct cause I dont know the source for it now.
My Question is if I am making anything wrong with jSon in PHP? If not than the Objects of the Sources are wrong.
<?php
$sn = isset($_GET['sn']) ? $_GET['sn'] : '';
if($sn)
{
$url = 'https://selfsolve.apple.com/warrantyChecker.do?sn='.$sn . "&country=USA";
$json = file_get_contents($url);
$json = substr($json, 5, -1);
$json_obj = json_decode($json);
if(isset($json_obj->ERROR_CODE))
{
echo $json_obj->ERROR_DESC;
}
else
{
echo "$json_obj->PROD_DESCR <img src=\"$json_obj->PROD_IMAGE_URL\" alt=\"\"><br>";
echo"Product Description: $json_obj->PROD_DESCR <br>";
echo"Purchase date: $json_obj->PURCHASE_DATE <br>";
echo"Warranty exp date: $json_obj->COVERAGE_DATE <br>";
}
}
?>
<form action="" method="get" accept-charset="utf-8">
<p><input name="sn" value="<?=$sn?>"><input type="submit" value="Lookup serial"></p>
</form>
Another way I have tried to do it is
<?php
$sn = $argv[1];
$data = json_decode(file_get_contents(
"https://selfsolve.apple.com/warrantyChecker.do?sn=". $sn . "&country=USA"));
echo "Product Description" .$data->PROD_DESCR."\n";
echo "Coverage for " . $sn . " ends on " . $data->COVERAGE_DATE . "\n";
?>

Answer 1

<?php
$sn = isset($_GET['sn']) ? $_GET['sn'] : '';
if($sn)
{
$url = 'https://selfsolve.apple.com/warrantyChecker.do?sn='.$sn . "&country=USA";
$json = file_get_contents($url);
//This line you are splitting the json form then it wont work
$json = substr($json, 5, -1);
$json_obj = json_decode($json);
if(isset($json_obj->ERROR_CODE))
{
echo $json_obj->ERROR_DESC;
}
else
{
echo "$json_obj->PROD_DESCR <img src=\"$json_obj->PROD_IMAGE_URL\" alt=\"\"><br>";
echo"Product Description: $json_obj->PROD_DESCR <br>";
echo"Purchase date: $json_obj->PURCHASE_DATE <br>";
echo"Warranty exp date: $json_obj->COVERAGE_DATE <br>";
}
}
?>