Why DateTime Rocks

gistfile1.txt

// Traditional

$parts = explode(' ', $dateTime);
$dates = explode('/', $parts[0]);
$times = explode(':', $parts[1]);
// check to see if it is am or pm
if(strtolower($parts[2]) == 'pm' && $times[0] != 12) {
	// add 12 to the hour as it needs to be military time
	$times[0]+=12;
}
return date('Y-m-d H:m:s', mktime($times[0], $times[1], $times[2], $dates[0], $dates[1], $dates[2]));

// With DateTime

return DateTime::createFromFormat("m/j/Y g:i:s A", $str)->format('Y-m-d H:i:s');


// Traditional Date difference

$parts = explode(' ', $start);
$dates = explode('/', $parts[0]);
$times = explode(':', $parts[1]);
$unix_start = mktime($times[0], $times[1], $times[2], $dates[0], $dates[1], $dates[2]);

$parts = explode(' ', $end);
$dates = explode('/', $parts[0]);
$times = explode(':', $parts[1]);
$unix_end = mktime($times[0], $times[1], $times[2], $dates[0], $dates[1], $dates[2]);

return ($unix_end - $unix_start);

// With Date Time

$objStart = DateTime::createFromFormat("m/j/Y g:i:s A", $strStart);
$objEnd = DateTime::createFromFormat("m/j/Y g:i:s A", $strEnd);

return $objStart->diff($objEnd)->format('%s');