php - How can i make the call better Trading API -

i trying build monitor ebay store.. dont know recommended way work trading api. found on internet can make call in curl tried this:

$xml =  '<?xml version="1.0" encoding="utf-8"?>'.         '<getebayofficialtimerequest xmlns="urn:ebay:apis:eblbasecomponents">'.         '<requestercredentials>'.         '<ebayauthtoken>'.         'xxxxxxxxxxxxxxxxxx'.         '</ebayauthtoken>'.         '</requestercredentials>'.         '<errorlanguage>en_us</errorlanguage>'.         '<warninglevel>high</warninglevel>'.              '</getebayofficialtimerequest>';  $headers = array(             'content-type: text/xml',             'x-ebay-api-compatibility-level: 967',             'x-ebay-api-dev-name: xxxxxx',             'x-ebay-api-app-name: xxxxxx',             'x-ebay-api-cert-name: xxxxxx',             'x-ebay-api-siteid: 0',             'x-ebay-api-call-name: getebayofficialtime' );  $url = 'https://api.ebay.com/ws/api.dll';  $ch = curl_init(); curl_setopt($ch, curlopt_url, $url); curl_setopt($ch, curlopt_returntransfer, 1); curl_setopt($ch, curlopt_httpheader, $headers); curl_setopt($ch, curlopt_postfields, $xml); curl_setopt($ch, curlopt_timeout, 400); curl_setopt($ch, curlopt_ssl_verifypeer, false);  $result = curl_exec($ch);   curl_close($ch);   echo '<pre>'; echo $result; echo '</pre>'; 

the output is:

2017-04-14t13:25:26.954zsuccess971e971_core_api6_18007281_r1

its work prints values want make call , store values in array or dont know.. im confusion.

my questions is: how can use php & xml calls in better way (if possible)? , how can manage values better?