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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace ABM\Wasabi;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Analog\Analog;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Ratchet\ConnectionInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Ratchet\MessageComponentInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Prestashop implements MessageComponentInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $clients;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $dbConn;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->clients = new \SplObjectStorage();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Now connect to PS DB using Simplon on Composer  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->dbConn = new \Simplon\Mysql\Mysql(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    '127.0.0.1',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    _DB_USER_,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    _DB_PASSWD_,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    _DB_NAME_  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $log_file = 'wasabi.log';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Analog::handler(\Analog\Handler\File::init($log_file));  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function onOpen(ConnectionInterface $conn)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Store the new connection to send messages to later  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->clients->attach($conn);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Analog::log("New connection: $conn->resourceId"); | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function onMessage(ConnectionInterface $from, $msg)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $result = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach ($this->clients as $client) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if ($from == $client) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $type = strtolower(substr($msg, 0, strpos($msg, '|')));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $data = substr($msg, strpos($msg, '|') + 1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                switch ($type) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    case 'cart': $result = Cart::getCartData($data);  | 
            
                            
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                                                    break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    case 'prod': $result = Product::getProductData($data);  | 
            
                            
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                                                    break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    case 'comb': $result = Combination::getCombinationData($data);  | 
            
                            
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                                                    break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    default:        break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if (!empty($result)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $client->send(json_encode($result));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function onClose(ConnectionInterface $conn)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // The connection is closed, remove it, as we can no longer send it messages  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->clients->detach($conn);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Analog::log('Connection '.$conn->resourceId.' has disconnected'); | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function onError(ConnectionInterface $conn, \Exception $e)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        echo "An error has occurred: {$e->getMessage()}\n"; | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Analog::log('Error: '.$e->getMessage().''); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $conn->close();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: