I found I way, where using a PHP server, you can send commands client. This would require set up a php server just to call the functions.
Communication PHP <-> AMXX via MOTD, but this is too much work when there is more friendly approaches.
You create a menu to show the motd information instead of the motd.
Or when you call 'am_info' you open a menu, to choose which motd page to show [Next page - Previous page - First Page - Last Page]. Once you choose a page, you open the motd on that page, but do not close the menu, one you close the motd current page, you can choose another on/from the menu, or close the menu with exit.