Get the time past between two MySQL dates in PHP
By: Ashley Hunt in PHP Tutorials on 2010-09-29
I wanted to get the time past from two MySQL dates and came up with this code that does the trick. Supply a start date, end date and optional output date/time format the default is in seconds but will expand from SS to MM:SS and then to HH:MM:SS automatically, you may wish to force a date format that will not be dynamic (site layout etc). See examples below, also see function date() for more date format options.
<?php
function calculate_time_past($start_time, $end_time, $format = "s") {
$time_span = strtotime($end_time) - strtotime($start_time);
if ($format == "s") { // is default format so dynamically calculate date format
if ($time_span > 60) { $format = "i:s"; }
if ($time_span > 3600) { $format = "H:i:s"; }
}
return gmdate($format, $time_span);
}
$start_time = "2007-03-28 00:50:14"; // 00:50:14 will work on its own
$end_time = "2007-03-28 00:52:59"; // 00:52:59 will also work instead
echo calculate_time_past($start_time, $end_time) . "<br />"; // will output 02:45
echo calculate_time_past($start_time, $end_time, "H:i:s"); // will output 00:02:45 when format is overridden
?>
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