Create time range function in php

timerange.php

<?php
// Below is a php time range function you can add in your php library and call it where you want to add time range dropdown.
function createTimeRange($startTime, $endTime, $interval = '15 mins', $format = '12') {
  try {
    if(!isset($startTime) || !isset($endTime)) {
    	throw new exception("Start or End time is missing");
    }
    $startTime = strtotime($startTime); 
    $endTime   = strtotime($endTime);
    $currentTime   = time(); 
    $addTime   = strtotime('+'.$interval, $currentTime); 
    $timeDiff      = $addTime - $currentTime;
    $timesArr = array();
    $timeFormat = ($format == '12')?'g:i:s A':'G:i:s'; 
    while ($startTime < $endTime) { 
        $timesArr[] = date($timeFormat, $startTime); 
        $startTime += $timeDiff; 
    }
    return $timesArr;
 } catch (Exception $e) {
   return $e->getMessage();
 }
}

// In the above function you have to pass two mandatory parameter Start and End time and can also pass two optional parameter.
/*
$startTime » Required. Specifies the start time. E.g., 7:30am or 7:30
$endTime » Required. Specifies the end time. E.g., 8:15pm or 20:30
$interval » Optional. Specifies the interval used in time range. E.g., 1 hour, 1 mins, 1 secs, etc
$format » Optional. Specifies which time format you want to get in the time range. E.g., 12 or 24
*/
?>