Doctrine\DBAL\Connection::resolveParams PHP Method

    public function resolveParams(array $params, array $types)
    {
        $resolvedParams = array();
        // Check whether parameters are positional or named. Mixing is not allowed, just like in PDO.
        if (is_int(key($params))) {
            // Positional parameters
            $typeOffset = array_key_exists(0, $types) ? -1 : 0;
            $bindIndex = 1;
            foreach ($params as $value) {
                $typeIndex = $bindIndex + $typeOffset;
                if (isset($types[$typeIndex])) {
                    $type = $types[$typeIndex];
                    list($value, ) = $this->getBindingInfo($value, $type);
                    $resolvedParams[$bindIndex] = $value;
                } else {
                    $resolvedParams[$bindIndex] = $value;
                }
                ++$bindIndex;
            }
        } else {
            // Named parameters
            foreach ($params as $name => $value) {
                if (isset($types[$name])) {
                    $type = $types[$name];
                    list($value, ) = $this->getBindingInfo($value, $type);
                    $resolvedParams[$name] = $value;
                } else {
                    $resolvedParams[$name] = $value;
                }
            }
        }
        return $resolvedParams;
    }

 /**
  * Executes the statement with the currently bound parameters.
  *
  * @param array|null $params
  *
  * @return boolean TRUE on success, FALSE on failure.
  *
  * @throws \Doctrine\DBAL\DBALException
  */
 public function execute($params = null)
 {
     if (is_array($params)) {
         $this->params = $params;
     }
     $logger = $this->conn->getConfiguration()->getSQLLogger();
     if ($logger) {
         $logger->startQuery($this->sql, $this->params, $this->types);
     }
     try {
         $stmt = $this->stmt->execute($params);
     } catch (\Exception $ex) {
         throw DBALException::driverExceptionDuringQuery($ex, $this->sql, $this->conn->resolveParams($this->params, $this->types));
     }
     if ($logger) {
         $logger->stopQuery();
     }
     $this->params = array();
     $this->types = array();
     return $stmt;
 }