PHP Manual Function Reference Command Line Specific Extensions Newt Newt Functions newt_set_help_callback newt_scrollbar_set newt_set_suspend_callback newt_set_help_callback (PECL newt >= 0.1)newt_set_help_callback — Description void newt_set_help_callback ( mixed $function ) WarningThis function is currently not documented; only its argument list is available. Parameters function Return Values No value is returned.