How do I load the Paypal SDK into Silex? - php

Question

I'm having some trouble. I'm using Silex, and I'm trying to load the Paypal SDK into it. I think my issue is related to my understanding of Silex, which is why I'm posting it here.
My Setup
Paypal's developer website says to add a few lines to the composer file (PHP tab). So, I've done that. My new composer file looks like so (the last four entries were those suggested by Paypal):
{
"require": {
"silex/silex": "1.0.*#dev",
"symfony/browser-kit": "2.1.*",
"symfony/console": "2.1.*",
"symfony/css-selector": "2.1.*",
"symfony/dom-crawler": "2.1.*",
"symfony/filesystem": "2.1.*",
"symfony/finder": "2.1.*",
"symfony/form": "2.1.*",
"symfony/locale": "2.1.*",
"symfony/process": "2.1.*",
"symfony/security": "2.1.*",
"symfony/serializer": "2.1.*",
"symfony/translation": "2.1.*",
"symfony/validator": "2.1.*",
"symfony/monolog-bridge": "2.1.*",
"symfony/twig-bridge": "2.1.*",
"monolog/monolog": ">=1.0.0,<1.2-dev",
"twig/twig": ">=1.2.0,<2.0-dev",
"doctrine/dbal": ">=2.2.0,<2.4.0-dev",
"swiftmailer/swiftmailer": "4.1.*",
"php": ">=5.3.0",
"ext-curl": "*",
"ext-json": "*",
"paypal/rest-api-sdk-php" : "0.7.*"
}
}
Then, I ran composer update, and it updated everything. I checked in the vendor folder, and a paypal folder had been created and seemed to be good to go.
The Problem
Unfortunately, even though I've done the above steps, it still isn't working. I'm following the beginners steps outlined on Paypal's website, it seems that one of the Paypal classes can't be located.
The line that causes the error is taken directly from the "beginners steps" page linked to above. For quick reference, I'll provide it below as well:
$cred = new OAuthTokenCredential("AQkquBDf1zctJOWGKWUEtKXm6qVhueUEMvXO_-MCI4DQQ4-LWvkDLIN2fGsd","EL1tVxAjhT7cJimnz5-Nsx9k2reTKSVfErNQF-CmrwJgxRtylkGTKlU4RvrX", $sdkConfig);
Unfortunately that line causes an error that says:
Fatal error: Class 'OAuthTokenCredential' not found in ...
Summed up...
The problem seems to be that Silex isn't loading--or making available--the class OAuthTokenCredential. What do I do?

Answer 1

Thanks Laurynas Mališauskas and user2930475 for this answer (in the comments of my post).
Looks like I had neglected to put a line such as:
use PayPal\Auth;
in my app.php file.
Once added, I also needed to change my new class line to this:
$cred = new PayPal\Auth\OAuthTokenCredential("AQkquBDf1zctJOWGKWUEtKXm6qVhueUEMvXO_-MCI4DQQ4-LWvkDLIN2fGsd","EL1tVxAjhT7cJimnz5-Nsx9k2reTKSVfErNQF-CmrwJgxRtylkGTKlU4RvrX", $sdkConfig);
Note that I have all of my controllers actually in the app.php file.

Answer 2

Actually, you don't need to add anything to app.php at all. Just do this:
use PayPal\Auth\OAuthTokenCredential.php;
class YourController{
public function myAction(){
// ...
$cred = new OAuthTokenCredential("AQkquB...","EL1tVx...", $sdkConfig);
// ...
}
}
You should never need to modify app.php just to use a class.