CODEWITHSUNDEEP
php
dresdain
dresdain

Reputation: 174

Compare time in PHP

I'm currently working on a program in PHP that will display a button for a subject . But I don't know the algorithm for if the schedule is 15 minutes before it starts.

eg. the subject will start 2:30 PM. The system will compare the current time, if the current time is 2:15 PM (15 minutes before the subject will start) the clickable button will display, else it shows a message for the time remaining.

$current_time = date('h:i A');
$time_start = date('h:i A', strtotime($r['time_start']));
$time_end = date('h:i A', strtotime($r['time_end']));

if( $current_time is 15 mins before $time_start && $current_time < $time_end){
  //show clickable button
}else{
  //show time remaining
}

enter image description here

Please help, the logic/algorithm is confusing me

Upvotes: 0

Views: 120

Answers (3)

Niels Keurentjes
Niels Keurentjes

Reputation: 41968

Don't compare strings, compare timestamps. time() is your friend.

$diff = time() - strtotime($r['time_start']);
if($diff < 0)
  ..too late, exam has started
elseif($diff > 15*60)
  ..more than 15 minutes remaining
else
  ..between 15 minutes and on time

Using DateTime would also work but is just major overkill for simply comparing 2 basic timestamps.

Upvotes: 2

Aidan
Aidan

Reputation: 767

$time = time()
if(($time > strtotime("2:15pm")) && ($time < strtotime("2:30pm")){
    //Display button
}else{
    //Show time remaining
}

Upvotes: -1

Scopey
Scopey

Reputation: 6319

This is where Datetime objects become really handy:

$time_start = new DateTime($r['time_start']);
$now = new DateTime();
$diff = $time_start->diff($now);

if($diff->i < 15){
    // Do stuff
}

Upvotes: 2

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