PHP compares the seconds of two time differences through strtotime

You can use strtotime to convert any time format to a unix timestamp to subtract the number of seconds between the two time ranges.

You can use strtotime to convert any time format to a unix timestamp to subtract the number of seconds between the two time ranges.

[Php]
$ Time1 = '2017-08-02 14:01:11 ';
$ Time2 = '2017-08-02 14:02:11 ';

Echo strtotime ($ time1)-strtotime ($ time2 );
?>
[/Php]

Strtotime -- parses the date and time descriptions of any English text into Unix timestamps
Int strtotime (string time [, int now])

This function is expected to accept a string that contains a date format in American English and try to parse it into a Unix timestamp (seconds since January 1 1970 00:00:00 GMT ), the value is relative to the time given by the now parameter. If this parameter is not provided, the current time is used.