Convert time in HH:MM:SS format to seconds only?

Question

How to turn time in format HH:MM:SS into a flat seconds number?

P.S. Time could be sometimes in format MM:SS only.

Answer 1

No need to explode anything:

$str_time = "23:12:95";  $str_time = preg_replace("/^([\d]{1,2})\:([\d]{2})$/", "00:$1:$2", $str_time);  sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);  $time_seconds = $hours * 3600 + $minutes * 60 + $seconds; 

And if you don't want to use regular expressions:

$str_time = "2:50";  sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);  $time_seconds = isset($seconds) ? $hours * 3600 + $minutes * 60 + $seconds : $hours * 60 + $minutes; 

Answer 2

I think the easiest method would be to use strtotime() function:

$time = '21:30:10'; $seconds = strtotime("1970-01-01 $time UTC"); echo $seconds;  // same with objects (for php5.3+) $time = '21:30:10'; $dt = new DateTime("1970-01-01 $time", new DateTimeZone('UTC')); $seconds = (int)$dt->getTimestamp(); echo $seconds; 

demo

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Function date_parse() can also be used for parsing date and time:

$time = '21:30:10'; $parsed = date_parse($time); $seconds = $parsed['hour'] * 3600 + $parsed['minute'] * 60 + $parsed['second']; 

demo

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If you will parse format MM:SS with strtotime() or date_parse() it will fail (date_parse() is used in strtotime() and DateTime), because when you input format like xx:yy parser assumes it is HH:MM and not MM:SS. I would suggest checking format, and prepend 00: if you only have MM:SS.

demo strtotime() demo date_parse()

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If you have hours more than 24, then you can use next function (it will work for MM:SS and HH:MM:SS format):

function TimeToSec($time) {     $sec = 0;     foreach (array_reverse(explode(':', $time)) as $k => $v) $sec += pow(60, $k) * $v;     return $sec; } 

demo