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Date/Time Functions
Provides a number of date and time related functions.
class.datetime.php
A new version adding extra functionality. Please be aware that the name of the class has change, and you no longer need to instantiate it.
<?php
// class.datetime.php
// version 2.0.0, 2004-07-29
//
// Description
//
// A PHP library of helpful date methods. This class does not
// need to be instantiated.
//
// Author
//
// Andrew Collington, 2004
// php@amnuts.com, http://php.amnuts.com/
//
// Feedback
//
// There is message board at the following address:
//
// http://php.amnuts.com/forums/index.php
//
// Please use that to post up any comments, questions, bug reports, etc. You
// can also use the board to show off your use of the script.
//
// License
//
// This class is available free of charge for personal or non-profit work. If
// you are using it in a commercial setting, please contact php@amnuts.com for
// payment and licensing terms.
//
// Support
//
// If you like this script, or any of my others, then please take a moment
// to consider giving a donation. This will encourage me to make updates and
// create new scripts which I would make available to you. If you would like
// to donate anything, then there is a link from my website to PayPal.
//
class DateTime
{
/**
* Compares two dates.
*
* Returns:
*
* < 0 if date1 is less than date2;
* > 0 if date1 is greater than date2;
* 0 if they are equal.
*
* @return int
* @param string|timestamp $date1
* @param string|timestamp $date2
*/
function compareDates($date1, $date2)
{
if (!is_numeric($date1)) {
$date1 = DateTime::timeStringToStamp($date1);
}
if (!is_numeric($date2)) {
$date2 = DateTime::timeStringToStamp($date2);
}
if ($date1 < $date2) {
return -1;
} else if ($date1 > $date2) {
return 1;
} else {
return 0;
}
}
/**
* Converts a date/time string to Unix timestamp
*
* @return timestamp
* @param string $string
*/
function timeStringToStamp($string)
{
return strtotime($string);
}
/**
* Converts Unix timestamp to a date/time string using format given
*
* Special options can be passed for the format parameter. These are
* set format types. The options currently include:
*
* o mysql
*
* If the time parameter isn't supplied, then the current local time
* will be used.
*
* @return string
* @param integer $time
* @param string $format
*/
function timeStampToString($time = 0, $format = 'Y-m-d H:i:s')
{
if ($format == 'mysql') {
$format = 'Y-m-d H:i:s';
}
if ($time == 0) {
$time = time();
}
return date($format, $time);
}
/**
* Converts a Unix timestamp or date/time string to a specific format.
*
* Special options can be passed for the format parameter. These are
* set format types. The options currently include:
*
* o mysql
*
* If the time parameter isn't supplied, then the current local time
* will be used.
*
* @return string
* @param integer|string $time
* @param string $format
* @see timeStringToStamp()
* @see timeStampToString()
*/
function timeFormat($time = 0, $format = 'Y-m-d H:i:s')
{
if (!is_numeric($time)) {
$time = DateTime::timeStringToStamp($time);
}
if ($time == 0) {
$time = time();
}
return DateTime::timeStampToString($time, $format);
}
/**
* Converts a Unix timestamp or date/time string to a human-readable
* format, such as '1 day, 2 hours, 42 mins, and 52 secs'
*
* Based on the word_time() function from PG+ (http://pgplus.ewtoo.org)
*
* @return string
* @param integer|string $time
* @see timeStringToStamp()
*/
function timeToHumanReadable($time = 0)
{
if (!is_numeric($time)) {
$time = DateTime::timeStringToStamp($time);
}
if ($time == 0) {
return 'no time at all';
} else {
if ($time < 0) {
$neg = 1;
$time = 0 - $time;
} else {
$neg = 0;
}
$days = $time / 86400;
$days = floor($days);
$hrs = ($time / 3600) % 24;
$mins = ($time / 60) % 60;
$secs = $time % 60;
$timestring = '';
if ($neg) {
$timestring .= 'negative ';
}
if ($days) {
$timestring .= "$days day" . ($days == 1 ? '' : 's');
if ($hrs || $mins || $secs) {
$timestring .= ', ';
}
}
if ($hrs) {
$timestring .= "$hrs hour" . ($hrs == 1 ? '' : 's');
if ($mins && $secs) {
$timestring .= ', ';
}
if (($mins && !$secs) || (!$mins && $secs)) {
$timestring .= ' and ';
}
}
if ($mins) {
$timestring .= "$mins min" . ($mins == 1 ? '' : 's');
if ($mins && $secs) {
$timestring .= ', ';
}
if ($secs) {
$timestring .= ' and ';
}
}
if ($secs) {
$timestring .= "$secs sec" . ($secs == 1 ? '' : 's');
}
return $timestring;
}
}
/**
* Give a slightly more fuzzy time string. such as: yesterday at 3:51pm
*
*
* @return string
* @param integer|string $time
* @see timeStringToStamp()
*/
function fuzzyTimeString($time = 0)
{
if (!is_numeric($time)) {
$time = DateTime::timeStringToStamp($time);
}
$now = time();
$sodTime = mktime(0, 0, 0, date('m', $time), date('d', $time), date('Y', $time));
$sodNow = mktime(0, 0, 0, date('m', $now), date('d', $now), date('Y', $now));
if ($sodNow == $sodTime) {
return 'today at ' . date('g:ia', $time); // check 'today'
} else if (($sodNow - $sodTime) <= 86400) {
return 'yesterday at ' . date('g:ia', $time); // check 'yesterday'
} else if (($sodNow - $sodTime) <= 432000) {
return date('l \a\\t g:ia', $time); // give a day name if within the last 5 days
} else if (date('Y', $now) == date('Y', $time)) {
return date('M j \a\\t g:ia', $time); // miss off the year if it's this year
} else {
return date('M j, Y \a\\t g:ia', $time); // return the date as normal
}
}
}
?>
6.64kb in size
last modified May 6, 2006 at 9:54pm
9055 views, 6167 downloads
test.datetime.php
A simple test script showing the method calls.
804b in size
last modified May 6, 2006 at 9:54pm
6203 views, 5179 downloads
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