FacebookApp.php

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<?php
namespace Facebook;
 
use Facebook\Authentication\AccessToken;
use Facebook\Exceptions\FacebookSDKException;
 
class FacebookApp implements \Serializable
{
    protected $id;
 
    protected $secret;
 
    public function __construct($id, $secret)
    {
        if (!is_string($id)
          // Keeping this for BC. Integers greater than PHP_INT_MAX will make is_int() return false
          && !is_int($id)) {
            throw new FacebookSDKException('The "app_id" must be formatted as a string since many app ID\'s are greater than PHP_INT_MAX on some systems.');
        }
        // We cast as a string in case a valid int was set on a 64-bit system and this is unserialised on a 32-bit system
        $this->id = (string) $id;
        $this->secret = $secret;
    }
 
    public function getId()
    {
        return $this->id;
    }
 
    public function getSecret()
    {
        return $this->secret;
    }
 
    public function getAccessToken()
    {
        return new AccessToken($this->id . '|' . $this->secret);
    }
 
    public function serialize()
    {
        return implode('|', [$this->id, $this->secret]);
    }
 
    public function unserialize($serialized)
    {
        list($id, $secret) = explode('|', $serialized);
 
        $this->__construct($id, $secret);
    }
}