With the current way you have it set up, the easiest way is to have the serverside part loop through each player and trigger clientside.
A not as laggy way would be to have some kind of timeout that updates the showtext to 'serverr.eventsmessage'.
But what's up with this (in the actionclientside)?
PHP Code:
if (timeout&&playerchats&&strequals(#c,/warp)){setlevel2 eventswarp_darkrival2.nw,30,35;}