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https://stackoverflow.com/questions/22681725/how-to-sum-n-number-of-time-hhmm-format
function sum_time() { $i = 0; foreach (func_get_args() as $time) { sscanf($time, '%d:%d', $hour, $min); $i += $hour * 60 + $min; } if ($h = floor($i / 60)) { $i %= 60; } return sprintf('%02d:%02d', $h, $i); } // use example echo sum_time('01:05', '00:02', '05:59'); # 07:06
https://dcblog.dev/quick-way-to-add-hours-and-minutes-with-php
Quick way to add hours and minutes with PHP. The following is really easy way to add days, minutes, hours and seconds to a time using PHP. Using the date function to set the format of the date to be returned then using strtotime to add the increase or decrease of time then after a comma use another strtotime passing in the start date and time. //set timezone …
https://thisinterestsme.com/add-hours-php/
Adding hours onto a date and time using PHP’s date and time functions. Take a look at the following example, which is intentionally verbose: //Get the current time in Unix. $currentTime = time (); //The amount of hours that you want to add. $hoursToAdd = 2; //Convert the hours into seconds. $secondsToAdd = $hoursToAdd * (60 * 60); //Add the seconds onto …
https://www.codexworld.com/how-to/add-days-hours-minutes-seconds-to-datetime-php/
In PHP, using date() and strtotime() function you can easily increase or decrease time. The provided PHP code lets you do the following works. Add days to datetime. Add hours to datetime. Add minutes to datetime. Add seconds to datetime. $startTime = date ("Y-m-d H:i:s"); //display the starting time echo 'Starting Time: '. $startTime; //add 1 hour to time
https://www.sitepoint.com/community/t/how-to-get-total-sum/19970
You can still wrap a sum function around anything you do in the query. sum(ROUND((TIME_TO_SEC(sr.endtime) - TIME_TO_SEC(sr.starttime)) / 3600.0 , 2 )) …
https://www.php.net/manual/en/function.time.php
If you want to create a "rounded" time stamp, for example, to the nearest 15 minutes use this as a reference: <?php. $round_numerator = 60 * 15 // 60 seconds per minute * 15 minutes equals 900 seconds. //$round_numerator = 60 * 60 or to the nearest hour. //$round_numerator = 60 * 60 * 24 or to the nearest day.
https://www.w3schools.com/Php/func_array_sum.asp
Returns the sum of all the values in an array: PHP Version: 4.0.4+ PHP Changelog: PHP versions prior to 4.2.1 modified the passed array itself and converted strings to numbers (which often converted them to zero, depending on their value)
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