original_string: protected function serverParamKeyToHeaderName($key)
      {
          $name = null;
          
          if (\Jasny\str_starts_with($key, 'HTTP_')) {
              $name = $this->headerCase(substr($key, 5));
          } elseif (in_array($key, ['CONTENT_TYPE', 'CONTENT_LENGTH'])) {
              $name = $this->headerCase($key);
          }
              
          return $name;
      }
code: protected function serverParamKeyToHeaderName($key)
      {
          $name = null;
          
          if (\Jasny\str_starts_with($key, 'HTTP_')) {
              $name = $this->headerCase(substr($key, 5));
          } elseif (in_array($key, ['CONTENT_TYPE', 'CONTENT_LENGTH'])) {
              $name = $this->headerCase($key);
          }
              
          return $name;
      }
code_tokens: protected function serverParamKeyToHeaderName ( $ key ) { $ name = null ; if ( \ Jasny \ str_starts_with ( $ key , 'HTTP_' ) ) { $ name = $ this -> headerCase ( substr ( $ key , 5 ) ) ; } elseif ( in_array ( $ key , [ 'CONTENT_TYPE' , 'CONTENT_LENGTH' ] ) ) { $ name = $ this -> headerCase ( $ key ) ; } return $ name ; }
docstring: Turn a server parameter key to a header name
  
  @param string $key
  @return string|null
docstring_tokens: Turn a server parameter key to a header name