message: Made variable's name more suitable.
diff: @@ -163,17 +163,17 @@ static PHP_METHOD(swoole_buffer, substr)
  {
  long offset;
  long length = -1;
  - zend_bool seek = 0;
  + zend_bool remove = 0;
  - if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|lb", &offset, &length, &seek) == FAILURE)
  + if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|lb", &offset, &length, &remove) == FAILURE)
  {
  RETURN_FALSE;
  }
  swString *buffer = swoole_get_object(getThis());
  - if (seek && !(offset == 0 && length < buffer->length))
  + if (remove && !(offset == 0 && length < buffer->length))
  {
  - seek = 0;
  + remove = 0;
  }
  if (offset < 0)
  {
  @@ -189,7 +189,7 @@ static PHP_METHOD(swoole_buffer, substr)
  php_error_docref(NULL TSRMLS_CC, E_WARNING, "offset(%ld,%ld) out of bounds.", offset, length);
  RETURN_FALSE;
  }
  - if (seek)
  + if (remove)
  {
  buffer->offset += length;
  zend_update_property_long(swoole_buffer_class_entry_ptr, getThis(), ZEND_STRL("length"),
  