Usually I do this by having my code into a loop, check for an event and terminate the loop if wanted to. Maybe someone has better way. I am looking forward to a reply too ! This should work through SSH too !

$flag=1;
while($flag) {
 $sleep=checkEvent();
 if(not $sleep) {
    --- do events
   $flag=0;
 } 
 else {
 #whatever time you want to delay before checking again !
   sleep(2);
 }
}
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