Zend\Code\Generator\ValueGenerator::getAutoDeterminedType PHP Method

    public function getAutoDeterminedType($value)
    {
        switch (gettype($value)) {
            case 'boolean':
                return self::TYPE_BOOLEAN;
            case 'string':
                foreach ($this->constants as $constant) {
                    if (strpos($value, $constant) !== false) {
                        return self::TYPE_CONSTANT;
                    }
                }
                return self::TYPE_STRING;
            case 'double':
            case 'float':
            case 'integer':
                return self::TYPE_NUMBER;
            case 'array':
                return self::TYPE_ARRAY;
            case 'NULL':
                return self::TYPE_NULL;
            case 'object':
            case 'resource':
            case 'unknown type':
            default:
                return self::TYPE_OTHER;
        }
    }