original_string: public function get(string $name): ?string
      {
          $key = strtolower($name);
          if (!isset($this->headers[$key])) {
              return null;
          }
  
          return $this->headers[$key][1];
      }
code: public function get(string $name): ?string
      {
          $key = strtolower($name);
          if (!isset($this->headers[$key])) {
              return null;
          }
  
          return $this->headers[$key][1];
      }
code_tokens: public function get ( string $ name ) : ? string { $ key = strtolower ( $ name ) ; if ( ! isset ( $ this -> headers [ $ key ] ) ) { return null ; } return $ this -> headers [ $ key ] [ 1 ] ; }
docstring: Returns the header value by header name if it exists, null otherwise.
  
  @since 1.0.0
  
  @param string $name The header name.
  
  @return string|null The header value by header name if it exists, null otherwise.
docstring_tokens: Returns the header value by header name if it exists null otherwise .