WSDL\Lexer\Tokenizer::lex PHP Method

    public function lex($string)
    {
        $tokens = array();
        $offset = 0;
        while (isset($string[$offset])) {
            foreach (self::$tokenMap as $regex => $token) {
                if (preg_match($regex, $string, $matches, null, $offset)) {
                    $tokens[] = TokenObject::create($token, trim($matches[0]));
                    $offset += strlen($matches[0]);
                    continue 2;
                }
            }
            throw new Exception(sprintf('Unexpected character: >%s< offset >%d<', $string[$offset], $offset));
        }
        $tokens[] = TokenObject::create(Token::EOF, 'eof');
        return $tokens;
    }

 /**
  * @test
  */
 public function shouldCreateParameterFromTokensWhenParameterIsHeader()
 {
     //given
     $tokenizer = new Tokenizer();
     //when
     $parameter = Parameter::fromTokens($tokenizer->lex('int[] $numbers'), true);
     //then
     $this->assertTrue($parameter->isHeader());
 }