php - Function to calculate "time until" instead of "time ago" -


i have function shows how long ago something.

but want convert function shows how many days left go. have following code:

function ago($eventtime) {     $totaldelay = time() - strtotime($eventtime);     if($totaldelay <= 0)     {         return 'nu';     }     else     {         if($days=floor($totaldelay/86400))         {             $totaldelay = $totaldelay % 86400;             return $days.' dagen geleden';         }         if($hours=floor($totaldelay/3600))         {             $totaldelay = $totaldelay % 3600;             return $hours.' uur geleden';         }         if($minutes=floor($totaldelay/60))         {             $totaldelay = $totaldelay % 60;             return $minutes.' minuten geleden ';         }         if($seconds=floor($totaldelay/1))         {             $totaldelay = $totaldelay % 1;             return $seconds.' seconden geleden';         }     } } 

you know how feature can create function allows see how many days still go, instead of ago?

this (what call) simple "math & time" issue.
change $totaldelay strtotime($eventtime) - time(); //just reverse them, no big deal.
if math, understand why places ofsrtotime($eventtime) & time() changed.


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