original_string: private static function sendHeader($key, $value) {
      if (isset(self::$send_header)) {
        call_user_func(self::$send_header, $key, $value);
      } else {
        header(sprintf("%s: %s", $key, $value));
      }
    }
code: private static function sendHeader($key, $value) {
      if (isset(self::$send_header)) {
        call_user_func(self::$send_header, $key, $value);
      } else {
        header(sprintf("%s: %s", $key, $value));
      }
    }
code_tokens: private static function sendHeader ( $ key , $ value ) { if ( isset ( self :: $ send_header ) ) { call_user_func ( self :: $ send_header , $ key , $ value ) ; } else { header ( sprintf ( "%s: %s" , $ key , $ value ) ) ; } }
docstring: SendHeader hook, used for testing.
  
  @param string $key The header key.
  @param string $value The header value.
  
  @access private
docstring_tokens: SendHeader hook used for testing .