Quick, handy time format functions. Useful for GUIs or whenever a human-friendly time format is preferred over a timestamp or machine-readable date-time format.

time_format_helper.php

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/*
 
	|----------------------------------------------------------------
	| Description
	|----------------------------------------------------------------
 
		Quick, handy time format functions. Useful for GUIs or whenever
		a human-friendly time format is preferred over a timestamp or
		machine-readable date-time format.
 
 
	|----------------------------------------------------------------
	| Dependencies
	|----------------------------------------------------------------
 
		CodeIgniter
 
 
	|----------------------------------------------------------------
	| Example Usage
	|----------------------------------------------------------------
 
 	<?php

		$ten_minutes_from_now = date('Y-m-d H:i:s', time() + 600);

		echo relative_time_format($ten_minutes_from_now);

	?>

		Should print the following:

			10 minutes from now
 

 	<?php

		$some_datetime = '2013-07-10 19:16:19';

		echo human_time_format($some_datetime);

	?>

		Should print the following:

			July 10, 2013 at 7:17 pm
 
*/

function relative_time_format($datetime)
{
	$timestamp = strtotime($datetime);

	if (!$timestamp)
		return '';

	$diff = time() - $timestamp;

	$ending = $diff >= 0 ? 'ago' : 'from now';

	return time_diff_to_string($diff) . ' ' . $ending;
}

function time_diff_to_string($diff)
{
	$periods = array('second', 'minute', 'hour', 'day', 'week', 'month', 'year', 'decade');
	$lengths = array(60, 60, 24, 7, 4.35, 12, 10);

	$diff = abs($diff);

	for ($j = 0; $diff >= $lengths[$j]; $j++)
		$diff /= $lengths[$j];

	$diff = round($diff);

	if ($diff != 1)
		$periods[$j] .= 's';

	return $diff . ' ' . $periods[$j];
}

function human_time_format($datetime)
{
	return date('F j, Y', strtotime($datetime)) . ' at ' . date('g:i a', strtotime($datetime));
}


/* End of file time_format_helper.php */
/* Location: ./application/helpers/time_format_helper.php */