Things to be aware of when using week numbers with years.
<?php
echo date("YW", strtotime("2011-01-07")); // gives 201101
echo date("YW", strtotime("2011-12-31")); // gives 201152
echo date("YW", strtotime("2011-01-01")); // gives 201152 too
?>
BUT
<?php
echo date("oW", strtotime("2011-01-07")); // gives 201101
echo date("oW", strtotime("2011-12-31")); // gives 201152
echo date("oW", strtotime("2011-01-01")); // gives 201052 (Year is different than previous example)
?>
Reason:
Y is year from the date
o is ISO-8601 year number
W is ISO-8601 week number of year
Conclusion:
if using 'W' for the week number use 'o' for the year.
date
(PHP 4, PHP 5, PHP 7)
date — Formata a data e a hora local
Descrição
string date
( string
$format
[, int $timestamp
] )
Retorna uma string de acordo com a string de formato informada usando o
inteiro timestamp informado, ou a hora atual local
se nenhum timestamp for informado. Em outras palavras, o parâmetro timestamp
é opcional e padronizado para o valor de time().
Parâmetros
-
format -
A string de formatação da data a ser mostrada. Veja as opções de formatação abaixo. Também existem diversas constantes predefinidas de data que podem ser utilizadas em substituição, por exemplo, a constante
DATE_RSScontêm a string de formatação 'D, d M Y H:i:s'.Os seguintes caracteres são reconhecidos na string do parâmetro formatCaractere de formatDescrição Exemplo de valores retornados Dia --- --- d Dia do mês, 2 dígitos com zero à esquerda 01 até 31 D Uma representação textual de um dia, três letras Mon até Sun j Dia do mês sem zero à esquerda 1 até 31 l ('L' minúsculo) A representação textual completa do dia da semana Sunday até Saturday N Representação numérica ISO-8601 do dia da semana (adicionado no PHP 5.1.0) 1 (para Segunda) até 7 (para Domingo) S Sufixo ordinal inglês para o dia do mês, 2 caracteres st, nd, rd ou th. Funciona bem com j w Representação numérica do dia da semana 0 (para domingo) até 6 (para sábado) z O dia do ano (iniciando em 0) 0 até 365 Semana --- --- W Número do ano da semana ISO-8601, começa na Segunda (adicionado no PHP 4.1.0) Exemplo: 42 (a 42ª semana do ano) Mês --- --- F Um representação completa de um mês, como January ou March January até December m Representação numérica de um mês, com zero à esquerda 01 a 12 M Uma representação textual curta de um mês, três letras Jan a Dec n Representação numérica de um mês, sem zero à esquerda 1 a 12 t Número de dias de um dado mês 28 até 31 Ano --- --- L Se está em um ano bissexto 1 se está em ano bissexto, 0, caso contrário. o Número do ano ISO-8601. Este tem o mesmo valor como Y, exceto que se o número da semana ISO (W) pertence ao anterior ou próximo ano, o ano é usado ao invés. (adicionado no PHP 5.1.0) Exemplos: 1999 ou 2003 Y Uma representação de ano completa, 4 dígitos Exemplos: 1999 ou 2003 y Uma representação do ano com dois dígitos Exemplos: 99 ou 03 Tempo --- --- a Antes/Depois de meio-dia em minúsculo am or pm A Antes/Depois de meio-dia em maiúsculo AM or PM B Swatch Internet time 000 até 999 g Formato 12-horas de uma hora sem zero à esquerda 1 até 12 G Formato 24-horas de uma hora sem zero à esquerda 0 até 23 h Formato 12-horas de uma hora com zero à esquerda 01 até 12 H Formato 24-horas de uma hora com zero à esquerda 00 até 23 i Minutos com zero à esquerda 00 até 59 s Segundos, com zero à esquerda 00 até 59 u Microssegundos (adicionado no PHP 5.2.2). Note que a função date() sempre gerará 000000, já que aceita um parâmetro integer, enquanto que DateTime::format() possui suporte a microssegundos se DateTime foi criado com microssegundos. Example: 654321 Fuso horário --- --- e Identificador do fuso horário (adicionado no PHP 5.1.0) Exemplos: UTC, GMT, Atlantic/Azores I (i maiúsculo) Se a data está ou não no horário de verão 1 se horário de verão, 0, caso contrário. O Deslocamento ao Horário de Greenwish (GMT) em horas Exemplo: +0200 P Deslocamento ao Horário de Greenwish (GMT) com dois pontos entre horas e minutos (adicionado no PHP 5.1.3) Exemplo: +02:00 T Abreviação do fuso horário Exemplos: EST, MDT ... Z Deslocamento, em segundos, do fuso horário. O deslocamento para fusos horários a oeste de UTC sempre será negativa, e para aqueles à leste de UTC sempre será positiva. -43200 até 50400 Data/Hora completa --- --- c Data ISO 8601 (adicionado no PHP 5) 2004-02-12T15:19:21+00:00 r » RFC 2822 formatted date Exemplo: Thu, 21 Dec 2000 16:01:07 +0200 U Segundos desde Unix Epoch (January 1 1970 00:00:00 GMT) Veja também time() Caracteres não reconhecidos na string de formatação serão impressos como são. O formato Z será sempre retornará 0 quando usar gmdate().
Nota:
Sabendo que esta função aceita somente timestamps integer o caractere de formatação u é útil somente quando utilizado com a função date_format() com um timestamp do usuário criado com date_create().
-
timestamp -
O parâmetro opcional
timestampé um integer Unix timestamp cujo padrão é a hora local setimestampnão for informado. Em outras palavras, o padrão é o valor da função time().
Valor Retornado
Retorna uma string da data formatada. Se um valor não-numérico é usado para
timestamp, FALSE é retornado e um erro de nível
E_WARNING é emitido.
Erros
Todas as chamadas a funções de data/hora gerarão um E_NOTICE
se o fuso horário não for válido, e/ou uma mensagem E_STRICT
ou E_WARNING
se utilizar as configurações do sistema ou a variável de ambiente
TZ. Veja também date_default_timezone_set()
Changelog
| Versão | Descrição |
|---|---|
| 5.1.0 | O intervalo válido de um timestamp é tipicamente de Sex, 13 Dez 1901 20:45:54 GMT até Ter, 19 Jan 2038 03:14:07 GMT. (Estas são as datas que correspondem ao valor mínimo e máximo para um inteiro com sinal de 32-bit). Contudo, em versões anteriores ao PHP 5.1.0 este intervalo era limitado de 01-01-1970 para 19-01-2038 em alguns sistemas (e.g. Windows). |
| 5.1.0 |
Agora lança erros |
| 5.1.1 |
Há constantes úteis
do padrão de formato de data/hora que podem ser usados para especificar o
parâmetro format.
|
Exemplos
Exemplo #1 Exemplos da função date()
<?php
// Modifica a zona de tempo a ser utilizada. Disnovível desde o PHP 5.1
date_default_timezone_set('UTC');
// Exibe alguma coisa como: Monday
echo date("l");
// Exibe alguma coisa como: Monday 8th of August 2005 03:12:46 PM
echo date('l jS \of F Y h:i:s A');
// Exibe: July 1, 2000 is on a Saturday
echo "July 1, 2000 is on a " . date("l", mktime(0, 0, 0, 7, 1, 2000));
/* utiliza as constantes do parâmetro de formato */
// Exibe alguma coisa como: Mon, 15 Aug 2005 15:12:46 UTC
echo date(DATE_RFC822);
// Exibe alguma coisa como: 2000-07-01T00:00:00+00:00
echo date(DATE_ATOM, mktime(0, 0, 0, 7, 1, 2000));
?>
Para prevenir que um caractere reconhecido na string de formatação seja expandido, escape-o, precedendo-o com uma barra invertida. Se o caractere com a barra invertida já é uma sequência especial, você pode precisar também escapar a barra invertida.
Exemplo #2 Caracteres de escape em date()
<?php
// exibe algo como: Wednesday the 15th
echo date("l \\t\h\e jS");
?>
É possível utilizar as funções date() e mktime() juntas para encontrar datas no futuro ou no passado.
Exemplo #3 Exemplo da date() e mktime()
<?php
$tomorrow = mktime (0, 0, 0, date("m") , date("d")+1, date("Y"));
$lastmonth = mktime (0, 0, 0, date("m")-1, date("d"), date("Y"));
$nextyear = mktime (0, 0, 0, date("m"), date("d"), date("Y")+1);
?>
Nota:
Isso pode ser mais confiável do que simplesmente adicionar ou subtrair o número de segundos em um dia ou mês para um timestamp, devido o horário de verão.
Alguns exemplos de formatação de date(). Note que você deve escapar qualquer outro caractere, pois qualquer um que possua um significado especial produzirá resultados indesejáveis, e outros caracteres podem assumir significado em futuras versões do PHP. Quando usar escape, certifique-se de usar aspas simples para evitar que caracteres como \n virem novas linhas.
Exemplo #4 Formatação com a função date()
<?php
// Assuming today is March 10th, 2001, 5:16:18 pm, and that we are in the
// Mountain Standard Time (MST) Time Zone
$today = date("F j, Y, g:i a"); // March 10, 2001, 5:16 pm
$today = date("m.d.y"); // 03.10.01
$today = date("j, n, Y"); // 10, 3, 2001
$today = date("Ymd"); // 20010310
$today = date('h-i-s, j-m-y, it is w Day'); // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.'); // it is the 10th day.
$today = date("D M j G:i:s T Y"); // Sat Mar 10 17:16:18 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h'); // 17:03:18 m is month
$today = date("H:i:s"); // 17:16:18
$today = date("Y-m-d H:i:s"); // 2001-03-10 17:16:18 (the MySQL DATETIME format)
?>
Para formatar datas em outros idiomas, você deve utilizar as funções setlocale() e strftime() em vez de date().
Notas
Nota:
Para gerar um timestamp de uma string da representação da data, pode-se utilizar as funções strtotime(). Adicionalmente, alguns banco de dados tem funções para converter os formatos de data para timestamps (como a função » UNIX_TIMESTAMP do MySQL).
Dica
O timestamp do início da requisição está disponível na variável $_SERVER['REQUEST_TIME'] desde o PHP 5.1.
Veja Também
- gmdate() - Formata uma data/hora GMT/CUT
- idate() - Formata uma hora/data local como um inteiro
- getdate() - Recupera informações de data/hora
- getlastmod() - Obtém o tempo da última modificação na pagina
- mktime() - Obtém um timestamp Unix de uma data
- strftime() - Formata uma hora/data de acordo com as configurações locais
- time() - Retorna o timestamp Unix atual
- strtotime() - Interpreta qualquer descrição de data/hora em texto em inglês em timestamp Unix
- Constantes Predefinidas da Classe DateTime
add a note
User Contributed Notes 51 notes
Jimmy ¶
4 years ago
ivijan dot stefan at gmail dot com ¶
1 year ago
If you have a problem with the different time zone, this is the solution for that.
<?php
// first line of PHP
$defaultTimeZone='UTC';
if(date_default_timezone_get()!=$defaultTimeZone)) date_default_timezone_set($defaultTimeZone);
// somewhere in the code
function _date($format="r", $timestamp=false, $timezone=false)
{
$userTimezone = new DateTimeZone(!empty($timezone) ? $timezone : 'GMT');
$gmtTimezone = new DateTimeZone('GMT');
$myDateTime = new DateTime(($timestamp!=false?date("r",(int)$timestamp):date("r")), $gmtTimezone);
$offset = $userTimezone->getOffset($myDateTime);
return date($format, ($timestamp!=false?(int)$timestamp:$myDateTime->format('U')) + $offset);
}
/* Example */
echo 'System Date/Time: '.date("Y-m-d | h:i:sa").'<br>';
echo 'New York Date/Time: '._date("Y-m-d | h:i:sa", false, 'America/New_York').'<br>';
echo 'Belgrade Date/Time: '._date("Y-m-d | h:i:sa", false, 'Europe/Belgrade').'<br>';
echo 'Belgrade Date/Time: '._date("Y-m-d | h:i:sa", 514640700, 'Europe/Belgrade').'<br>';
?>
This is the best and fastest solution for this problem. Working almost identical to date() function only as a supplement has the time zone option.
Anonymous ¶
3 months ago
If timestamp is a string, date converts it to an integer in a possibly unexpected way:
<?php
echo (int)'0x10'; //0
echo intval('0x10'); //0
echo date('s', '0x10'); //gives 16
//however, no octal conversion:
echo date('s', '010'); //gives 10
?>
(PHP 5.6.16)
FiraSEO ¶
3 years ago
this how you make an HTML5 <time> tag correctly
<?php
echo '<time datetime="'.date('c').'">'.date('Y - m - d').'</time>';
?>
in the "datetime" attribute you should put a machine-readable value which represent time , the best value is a full time/date with ISO 8601 ( date('c') ) ,,, the attr will be hidden from users
and it doesn't really matter what you put as a shown value to the user,, any date/time format is okay !
This is very good for SEO especially search engines like Google .
Charlie ¶
4 months ago
For HTML5 datetime-local HTML input controls (http://www.w3.org/TR/html-markup/input.datetime-local.html) use format example: 1996-12-19T16:39:57
To generate this, escape the 'T', as shown below:
<?php
date('Y-m-d\TH:i:s');
?>
adityabhai at gmail dot com ¶
2 years ago
For Microseconds, we can get by following:
echo date('Ymd His'.substr((string)microtime(), 1, 8).' e');
Thought, it might be useful to someone !
bakerj417 at gmail dot com ¶
4 years ago
If you are having an issue getting u to work so is everyone else. The solution that I am using which I found on another site(so not taking credit) is to use this:
date("Y/m/d H:i:s"). substr((string)microtime(), 1, 6);
that will give you:
yyyy/mm/dd hh:ii:ss.uuuuuu
hope this helps someone in need!
thanks all
eduardo at digmotor dot com dot br ¶
7 years ago
Thanks to tcasparr at gmail dot com for the great idea (at least for me) ;)
I changed the code a little to replicate the functionality of date_parse_from_format, once I don't have PHP 5.3.0 yet. This might be useful for someone. Hope you don't mind changing your code tcasparr at gmail dot com.
<?php
/*******************************************************
* Simple function to take in a date format and return array of associated
* formats for each date element
*
* @return array
* @param string $strFormat
*
* Example: Y/m/d g:i:s becomes
* Array
* (
* [year] => Y
* [month] => m
* [day] => d
* [hour] => g
* [minute] => i
* [second] => s
* )
*
* This function is needed for PHP < 5.3.0
********************************************************/
function dateParseFromFormat($stFormat, $stData)
{
$aDataRet = array();
$aPieces = split('[:/.\ \-]', $stFormat);
$aDatePart = split('[:/.\ \-]', $stData);
foreach($aPieces as $key=>$chPiece)
{
switch ($chPiece)
{
case 'd':
case 'j':
$aDataRet['day'] = $aDatePart[$key];
break;
case 'F':
case 'M':
case 'm':
case 'n':
$aDataRet['month'] = $aDatePart[$key];
break;
case 'o':
case 'Y':
case 'y':
$aDataRet['year'] = $aDatePart[$key];
break;
case 'g':
case 'G':
case 'h':
case 'H':
$aDataRet['hour'] = $aDatePart[$key];
break;
case 'i':
$aDataRet['minute'] = $aDatePart[$key];
break;
case 's':
$aDataRet['second'] = $aDatePart[$key];
break;
}
}
return $aDataRet;
}
?>
Also, if you need to change the format of dates:
<?php
function changeDateFormat($stDate,$stFormatFrom,$stFormatTo)
{
// When PHP 5.3.0 becomes available to me
//$date = date_parse_from_format($stFormatFrom,$stDate);
//For now I use the function above
$date = dateParseFromFormat($stFormatFrom,$stDate);
return date($stFormatTo,mktime($date['hour'],
$date['minute'],
$date['second'],
$date['month'],
$date['day'],
$date['year']));
}
?>
Tim Connolly ¶
3 years ago
Here's my solution for looking up the month number by name (used when parsing an 'ls'):
<?php
for($m=1;$m<=12;$m++){
$month=date("M",mktime(0,0,0,$m,1,2000));
$mon["$month"]=$m;
}
?>
@PeteWilliams ¶
5 years ago
If you want to use HTML5's <date> tag, the following code will generate the machine-readable value for the 'datetime' attribute:
<?php
/**
* formats the date passed into format required by 'datetime' attribute of <date> tag
* if no intDate supplied, uses current date.
* @param intDate integer optional
* @return string
**/
function getDateTimeValue( $intDate = null ) {
$strFormat = 'Y-m-d\TH:i:s.uP';
$strDate = $intDate ? date( $strFormat, $intDate ) : date( $strFormat ) ;
return $strDate;
}
echo getDateTimeValue();
?>
matthew dot hotchen at worldfirst dot com ¶
2 years ago
FYI: there's a list of constants with predefined formats on the DateTime object, for example instead of outputting ISO 8601 dates with:
<?php
echo date('c');
?>
or
<?php
echo date('Y-m-d\TH:i:sO');
?>
You can use
<?php
echo date(DateTime::ISO8601);
?>
instead, which is much easier to read.
Anonymous ¶
7 years ago
Correct format for a MySQL DATETIME column is
<?php $mysqltime = date ("Y-m-d H:i:s", $phptime); ?>
Just.Kevin ¶
6 years ago
In order to determine if a year is a leap year an earlier poster suggested simply checking to see if the year is a multiple of four:
<?php
function is_leapyear_broken($year = 2004) {
return ($year%4)==0;
}
?>
While this will work for the majority of years it will not work on years that are multiples of 100 but not multiples of 400 i.e.(2100).
A function not using php's date() function that will also account for this small anomaly in leap years:
<?php
function is_leapyear_working($year = 2004) {
if((($year%4==0) && ($year%100!=0)) || $year%400==0) {
return true;
}
return false;
}
?>
While is_leapyear_working will not return true for the few non-leap years divisible by four I couldn't tell you if this is more or less efficient than using php's date() as an even earlier poster suggested:
<?php
function is_leapyear($year = 2004) {
$is_leap = date('L', strtotime("$year-1-1"));
return $is_leap;
}
?>
Bas Vijfwinkel ¶
4 years ago
Note that some formatting options are different from MySQL.
For example using a 24 hour notation without leading zeros is the option '%G' in PHP but '%k' in MySQL.
When using dynamically generated date formatting string, be careful to generate the correct options for either PHP or MySQL.
Horst Frank ¶
22 days ago
in some cases you can't or don't like to change the setlocal(), but you want to get a translated date(). This function is an example for a geman translation-table.
function ddate ($format,$timestamp) {
$trans = array(
'Monday' => 'Montag',
'Tuesday' => 'Dienstag',
'Wednesday' => 'Mittwoch',
'Thursday' => 'Donnerstag',
'Friday' => 'Freitag',
'Saturday' => 'Samstag',
'Sunday' => 'Sonntag',
'Mon' => 'Mo',
'Tue' => 'Di',
'Wed' => 'Mi',
'Thu' => 'Do',
'Fri' => 'Fr',
'Sat' => 'Sa',
'Sun' => 'So',
'January' => 'Januar',
'February' => 'Februar',
'March' => 'März',
'May' => 'Mai',
'June' => 'Juni',
'July' => 'Juli',
'October' => 'Oktober',
'December' => 'Dezember',
'Mar' => 'Mär',
'Oct' => 'Okt',
'Dec' => 'Dez',
);
return strtr(date($format,$timestamp),$trans);
}
Anonymous ¶
2 years ago
It's common for us to overthink the complexity of date/time calculations and underthink the power and flexibility of PHP's built-in functions. Consider http://php.net/manual/en/function.date.php#108613
<?php
function get_time_string($seconds)
{
return date('H:i:s', strtotime("2000-01-01 + $seconds SECONDS"));
}
gerben at gerbenwijnja dot nl ¶
4 years ago
I use the function below to calculate the Unix timestamp of the start of a week. It includes a boolean flag to request a GMT offset instead of the current locale setting.
<?php
function getWeekOffsetTimestamp($year, $week, $useGmt = false) {
if ($useGmt) {
// Backup timezone and set to GMT
$timezoneSettingBackup = date_default_timezone_get();
date_default_timezone_set("GMT");
}
// According to ISO-8601, January 4th is always in week 1
$halfwayTheWeek = strtotime($year."0104 +".($week - 1)." weeks");
// Subtract days to Monday
$dayOfTheWeek = date("N", $halfwayTheWeek);
$daysToSubtract = $dayOfTheWeek - 1;
// Calculate the week's timestamp
$unixTimestamp = strtotime("-$daysToSubtract day", $halfwayTheWeek);
if ($useGmt) {
// Reset timezone to backup
date_default_timezone_set($timezoneSettingBackup);
}
return $unixTimestamp;
}
?>
tkachenko_ivan at bk dot ru ¶
6 months ago
<?php
/**
* Convert a strftime format to a date format
*
* Unsupported strftime formats : %U, %W, %C, %g, %r, %R, %T, %X, %c, %D, %F, %x
* Unsupported date formats : S, n, t, L, B, G, u, e, I, P, Z, c, r
*
* @param string $strftimeFormat a strftime format
* @return string
*/
function strftimeFormatToDate($strftimeFormat) {
$caracs = array(
"%d" => "d",
"%a" => "D",
"%e" => "j",
"%A" => "l",
"%u" => "N",
"%w" => "w",
"%j" => "z",
"%V" => "W",
"%B" => "F",
"%m" => "m",
"%b" => "M",
"%G" => "o",
"%Y" => "Y",
"%y" => "y",
"%P" => "a",
"%p" => "A",
"%l" => "g",
"%I" => "h",
"%H" => "H",
"%M" => "i",
"%S" => "s",
"%z" => "O",
"%Z" => "T",
"%s" => "U",
);
return strtr((string)$strftimeFormat, $caracs);
}
$strftimeFormat = '%Y-%m-%d %H:%M:%S';
$formatDate = strftimeFormatToDate($strftimeFormat); // Y-m-d H:i:s
?>
geoffrey dot hoffman at gmail dot com ¶
3 months ago
I just wanted to emphasise that the return value of date( ) is a string, even when the result of your date format string is a number, such as "j" -> a number 1 to 31, or 'N' -> a day number 1 for Monday through 7 for Sunday... it's still returned as a string! "1" or "7" or "31". This is much more obvious on the "zero-padded" results, but it's worth repeating.
If you aren't careful, you can get stuck in a while loop comparing days of the week with something like:
<?php
// Evil! Don't use this! This will never return!
while ( date('N', $time ) !== 7 ) {
$time = $time - 86400;
}
?>
... for example. The result of date( ) should be cast to an int for numeric comparison with the exact equality operator:
<?php
// Works!
while ( (int)date('N', $time ) !== 7 ) {
$time = $time - 86400;
}
?>
Wasted an hour today on that silly mistake.
SpikeDaCruz ¶
10 years ago
The following function will return the date (on the Gregorian calendar) for Orthodox Easter (Pascha). Note that incorrect results will be returned for years less than 1601 or greater than 2399. This is because the Julian calendar (from which the Easter date is calculated) deviates from the Gregorian by one day for each century-year that is NOT a leap-year, i.e. the century is divisible by 4 but not by 10. (In the old Julian reckoning, EVERY 4th year was a leap-year.)
This algorithm was first proposed by the mathematician/physicist Gauss. Its complexity derives from the fact that the calculation is based on a combination of solar and lunar calendars.
<?php
function getOrthodoxEaster($date){
/*
Takes any Gregorian date and returns the Gregorian
date of Orthodox Easter for that year.
*/
$year = date("Y", $date);
$r1 = $year % 19;
$r2 = $year % 4;
$r3 = $year % 7;
$ra = 19 * $r1 + 16;
$r4 = $ra % 30;
$rb = 2 * $r2 + 4 * $r3 + 6 * $r4;
$r5 = $rb % 7;
$rc = $r4 + $r5;
//Orthodox Easter for this year will fall $rc days after April 3
return strtotime("3 April $year + $rc days");
}
?>
Anonymous ¶
2 years ago
To quickly convert date("N") to a 0 based index with Sunday being represented as 0, you can run it against modulus 7:
<?php
$first_of_month_index = date('N', strtotime('4/1/1990')) % 7;
?>
mel dot boyce at gmail dot com ¶
10 years ago
I've been flicking through the comments looking for some succinct date code and have noticed an alarming number of questions and over-burdened examples related to date mathematics. One of the most useful skills you can utilize when performing date math is taking full advantage of the UNIX timestamp. The UNIX timestamp was built for this kind of work.
An example of this relates to a comment made by james at bandit-dot-co-dot-en-zed. James was looking for a way to calculate the number of days which have passed since a certain date. Rather than using mktime() and a loop, James can subtract the current timestamp from the timestamp of the date in question and divide that by the number of seconds in a day:
<?php
$days = floor((time() - strtotime("01-Jan-2006"))/86400);
print("$days days have passed.\n");
?>
Another usage could find itself in a class submitted by Kyle M Hall which aids in the creation of timestamps from the recent past for use with MySQL. Rather than the looping and fine tuning of a date, Kyle can use the raw UNIX timestamps (this is untested code):
<?php
$ago = 14; // days
$timestamp = time() - ($ago * 86400);
?>
Hopefully these two examples of "UNIX-style" timestamp usage will help those finding date mathematics more elusive than it should be.
Leopietroni ¶
3 years ago
This function will add working day to a given timestamp
<?php
function addworkinday($timestamp,$daystoadd){
$dayoftheweek = date("N",$timestamp);
$sum =$dayoftheweek +$daystoadd;
while ($sum >= 6) {
$daystoadd=$daystoadd+1;
$sum=$sum-1;
}
return $timestamp +(60*60*24*$daystoadd);
}
?>
ghotinet ¶
5 years ago
Most spreadsheet programs have a rather nice little built-in function called NETWORKDAYS to calculate the number of business days (i.e. Monday-Friday, excluding holidays) between any two given dates. I couldn't find a simple way to do that in PHP, so I threw this together. It replicates the functionality of OpenOffice's NETWORKDAYS function - you give it a start date, an end date, and an array of any holidays you want skipped, and it'll tell you the number of business days (inclusive of the start and end days!) between them.
I've tested it pretty strenuously but date arithmetic is complicated and there's always the possibility I missed something, so please feel free to check my math.
The function could certainly be made much more powerful, to allow you to set different days to be ignored (e.g. "skip all Fridays and Saturdays but include Sundays") or to set up dates that should always be skipped (e.g. "skip July 4th in any year, skip the first Monday in September in any year"). But that's a project for another time.
<?php
function networkdays($s, $e, $holidays = array()) {
// If the start and end dates are given in the wrong order, flip them.
if ($s > $e)
return networkdays($e, $s, $holidays);
// Find the ISO-8601 day of the week for the two dates.
$sd = date("N", $s);
$ed = date("N", $e);
// Find the number of weeks between the dates.
$w = floor(($e - $s)/(86400*7)); # Divide the difference in the two times by seven days to get the number of weeks.
if ($ed >= $sd) { $w--; } # If the end date falls on the same day of the week or a later day of the week than the start date, subtract a week.
// Calculate net working days.
$nwd = max(6 - $sd, 0); # If the start day is Saturday or Sunday, add zero, otherewise add six minus the weekday number.
$nwd += min($ed, 5); # If the end day is Saturday or Sunday, add five, otherwise add the weekday number.
$nwd += $w * 5; # Add five days for each week in between.
// Iterate through the array of holidays. For each holiday between the start and end dates that isn't a Saturday or a Sunday, remove one day.
foreach ($holidays as $h) {
$h = strtotime($h);
if ($h > $s && $h < $e && date("N", $h) < 6)
$nwd--;
}
return $nwd;
}
$start = strtotime("1 January 2010");
$end = strtotime("13 December 2010");
// Add as many holidays as desired.
$holidays = array();
$holidays[] = "4 July 2010"; // Falls on a Sunday; doesn't affect count
$holidays[] = "6 September 2010"; // Falls on a Monday; reduces count by one
echo networkdays($start, $end, $holidays); // Returns 246
?>
Or, if you just want to know how many work days there are in any given year, here's a quick function for that one:
<?php
function workdaysinyear($y) {
$j1 = mktime(0,0,0,1,1,$y);
if (date("L", $j1)) {
if (date("N", $j1) == 6)
return 260;
elseif (date("N", $j1) == 5 or date("N", $j1) == 7)
return 261;
else
return 262;
}
else {
if (date("N", $j1) == 6 or date("N", $j1) == 7)
return 260;
else
return 261;
}
}
?>
Edward Rudd ¶
6 years ago
To actually make use ot the "u" (microsecond) you need to use the DateTime object and not the date() function.
For example
<?php
$t = microtime(true);
$micro = sprintf("%06d",($t - floor($t)) * 1000000);
$d = new DateTime( date('Y-m-d H:i:s.'.$micro,$t) );
print $d->format("Y-m-d H:i:s.u");
?>
lb at bostontech dot net ¶
6 years ago
Not sure why this got ignored the first time, but this is an even simpler way to check leap year:
<?php
function isLeapYear($year)
{ return ((($year%4==0) && ($year%100)) || $year%400==0) ? (true):(false); }
?>
frank at interactinet dot com ¶
4 years ago
If you want to compare this week with the same week last year, here is some code to get you the time at the beginning of the week. You can then add days, hours, etc to get to the day of the week that you want to know about.
<?php
$time_passed = (date('N')-1)* 24 * 3600; // time since start of week in days
$startOfWeek = mktime(0,0,0,date('m'),date('d'),date('Y')) - $time_passed;
$lastyear = $startOfWeek - 365*24*3600;
// make sure time used from last year is the same week of the year
$weekdiff = date('W') - date('W',$lastyear);
if($weekdiff != 0)
{
$lastyear = $lastyear + ($weekdiff*7*24*3600);
}
$lastyear_time_passed = (date('N',$lastyear)-1) * 24 * 3600; // time since start of week in days
$startOfWeek_lastyear = mktime(0,0,0,date('m',$lastyear),date('d',$lastyear),date('Y',$lastyear)) - $lastyear_time_passed;
?>
So now you have the unix time for the start of this week ($startOfWeek), and the start of the same week last year ($startOfWeek_lastyear).
You can convert back to datetime format easily:
<?php
echo date('Y-m-d H:i:s',$startOfWeek).'<br>';
echo date('Y-m-d H:i:s',$startOfWeek_lastyear).'<br><br>';
echo date('l F jS, Y',$startOfWeek).'<br>';
echo date('l F jS, Y',$startOfWeek_lastyear);
?>
webmaster1989 at gmail dot com ¶
3 years ago
Sometimes it is very useful to convert a sql timestamp to an also called NTP time. This is often used as time date notation in XML RSS pages. To convert a timestamp to this NTP notation try the following:
<?php
echo date('D, d M Y h:i:s O', strtotime ($timestamp);
?>
m_ocx at yahoo dot com ¶
3 years ago
Here is a cool Date class to implement the date function:
<?php
/*
* @author Gchats
*
* Date class
*/
class Date
{
private $shortDateFormat = "F j, Y";
private $longDateFormat = "F j, Y, g:i a";
private $timestamp = 0;
/**
* Default constructor
*
* @param integer $timestamp unix time stamp
*/
function __construct($timestamp = 0)
{
$this->timestamp = $timestamp;
}
/**
* Returns the given timestamp in the constructor
*
* @return integer time stamp
*/
public function getTime()
{
return (int) $this->timestamp;
}
/*
* Returns long formatted date of the given timestamp
*
* @access public
* @return string Long formatted date
*/
public function long()
{
if ( $this->timestamp > 0 )
{
return date ( $this->longDateFormat , $this->timestamp );
}
else
{
return "";
}
}
/*
* Returns short formatted date of the given timestamp
*
* @access public
* @return string Short formatted date
*/
public function short()
{
if ( $this->timestamp > 0 )
{
return date ( $this->shortDateFormat , $this->timestamp );
}
else
{
return "";
}
}
public function __toString()
{
return $this->timestamp;
}
}
?>
JonathanCross.com ¶
7 years ago
<?php
// A demonstration of the new DateTime class for those
// trying to use dates before 1970 or after 2038.
?>
<h2>PHP 2038 date bug demo (php version <?php echo phpversion(); ?>)</h1>
<div style='float:left;margin-right:3em;'>
<h3>OLD Buggy date()</h3>
<?php
$format='F j, Y';
for ( $i = 1900; $i < 2050; $i++) {
$datep = "$i-01-01";
?>
Trying: <?php echo $datep; ?> = <?php echo date($format, strtotime($datep)); ?><br>
<?php
}
?></div>
<div style='float:left;'>
<h3>NEW DateTime Class (v 5.2+)</h3><?php
for ( $i = 1900; $i < 2050; $i++) {
$datep = "$i-01-01";
$date = new DateTime($datep);
?>
Trying: <?php echo $datep; ?> = <?php echo $date->format($format); ?><br>
<?php
}
?></div>
ttt_joe_08 ¶
2 years ago
Just FYI, it's more appropriate to say "UTC", not "GMT". GMT was given up in 1972 and UTC is now the proper way. The reason being G stands for Greenwich, which naturally upset some people.
nathan ¶
4 years ago
<?php
/* the following variables are set to appropriate
characters recognized by php version 5 that
will get the date. To display the date, we have
to use 'echo' or 'print' to send the variable
data to the browser
*/
$day=date("l");
$date=date("j");
$suffix=date("S");
$month=date("F");
$year=date("Y");
echo $day . ", " . $month . " " . $date . $suffix . ", " . $year;
?>
rudimentary, simple way to due things, but it gets the job done for someone learning more on the subject.
scott at keenot dot es ¶
2 years ago
If anyone needs a really fast function for converting a datetime string (i.e. as retrieved from a MySQL DATETIME entry) into a human-friendly time output analogous to date($format, $time), here's a useful function.
<?php
function fdate($datetimestring = '1970-01-01 00:00:00', $format = 'U') {
// Create a datetime object, return it formatted
// If you want to give credit for this somewhere, thanks.
// You really don't have to though; this is kinda obvious
$dt = new DateTime($datetimestring);
return $dt->format($format);
}
?>
The main purpose of this is to reduce lines of code and allow inline coding. For example:
<?php
/* ... */
echo "This page was submitted on ".fdate($row['created'], 'F j, Y g:i:s A')." and last modified ".fdate($row['modified'], 'F j, Y g:i:s A')."<br />\n";
/* ... */
?>
Chris ¶
3 years ago
Use this to convert the local/UTC hour to the UTC/local hour:
<?php
for($utc_to_local = array(), $offset = date('Z'), $h = 0; $h < 24; $utc_to_local[] = date('G', mktime($h++)+$offset));
$local_to_utc = array_flip($utc_to_local);
echo "2 am local is ", $local_to_utc[2], " UTC";
echo "3 pm UTC is ", $utc_to_local[15], " local";
?>
This is useful when you need to do many conversions. Lookup tables are faster than calling date() and mktime() multiple times.
jc ¶
8 years ago
date("W") returns the iso8601 week number, while date("Y") returns the _current_ year. This can lead to odd results. For example today (dec 31, 2007) it returns 1 for the week and of course 2007 for the year. This is not wrong in a strict sense because iso defines this week as the first of 2008 while we still have 2007.
So, if you don't have another way to safely retrieve the year according to the iso8061 week-date - strftime("%G") doesn't work on some systems -, you should be careful when working with date("W").
For most cases strftime("%W") should be a safe replacement.
[edit: Much easier is to use "o" (lower case O) instead of "Y"]
Anonymous ¶
3 years ago
To find last sunday for given date
<?php
$day = '2012-10-04';
echo 'last sunday : '.date("Y-m-d",strtotime($day." last Sunday "));
?>
output:
last sunday : 2012-09-30
Anon ¶
3 years ago
I needed to convet a duration timestamp into H:i:s but whenever I did it kept bringing 5 back as 01:00:05 (due to some DST stuff) so I made this function to replace date(). It has no optimisations but hopefully someone might find it useful:
<?php
function get_time_string(){
$time = 3600+(60*32)+(50); // 01:32:50
$time_string = '';
$hours = (int)($time/(60*60));
if(strlen($hours) > 1){
$time_string = $hours.':';
}else{
$time_string = '0'.$hours.':';
}
$minutes = (int)(($time%(60*60))/(60));
if($minutes >= 1){
if(strlen($minutes) > 1){
$time_string .= $minutes.':';
}else{
$time_string .= '0'.$minutes.':';
}
$seconds = ($time%(60*60))%(60);
if(strlen($seconds) > 1){
$time_string .= $seconds;
}else{
$time_string .= '0'.$seconds;
}
}else{
if(strlen($time) > 1){
$time_string .= '00:'.$time;
}else{
$time_string .= '00:0'.$time;
}
}
return $time_string;
}
?>
stokestack at gmail dot com ¶
3 years ago
If you want to find your server's timezone offset from GMT, it seems as though you could just do:
date('Z')
to get the number of seconds offset. But PHP requires that you call date_default_timezone_set(). So if you have to hard-code a timezone, why not simply hard-code a variable that tells you the offset from GMT? If you set the timezone to GMT, the dates in your database will still be in local time, but time('Z') will return zero.
To keep your code portable across servers in different timezones, you can do this:
date_default_timezone_set(date_default_timezone_get())
This keeps PHP from complaining that you haven't called date_default_timezone_set(), but makes your code portable. Ridiculous.
Anonymous ¶
2 years ago
Was trying to compare dates when I noticed that:
<?php
var_dump(date('d.m.Y', null));//string(10) "01.01.1970"
var_dump(date('d.m.Y', ''));//bool(false)
?>
Thought it's worth mentioning. Caused some weird logs to be produced in our system since this does not evaluate to the same.
sanket at webvice dot co dot uk ¶
8 months ago
<?
/**
* This function gives you the next working days based on the buffer
*
* @param $date must be in YYYY-MM-DD format
* @param int $buffer
* @param string $holidays - You can pass either an array of holidays in YYYYYMMDD format or a URL for a .ics file
* containing holidays this defaults to the UK govt holiday data for England and Wales
* @return string
*/
function getWorkingDays($date,$buffer=1,$holidays='') {
if ($holidays==='') $holidays = 'https://www.gov.uk/bank-holidays/england-and-wales.ics';
if (!is_array($holidays)) {
$ch = curl_init($holidays);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
$ics = curl_exec($ch);
curl_close($ch);
$ics = explode("\n",$ics);
$ics = preg_grep('/^DTSTART;/',$ics);
$holidays = preg_replace('/^DTSTART;VALUE=DATE:(\\d{4})(\\d{2})(\\d{2}).*/s','$1-$2-$3',$ics);
}
$addDay = 0;
while ($buffer--) {
while (true) {
$addDay++;
$newDate = date('Y-m-d', strtotime("$date +$addDay Days"));
$newDayOfWeek = date('w', strtotime($newDate));
if ( $newDayOfWeek>0 && $newDayOfWeek<6 && !in_array($newDate,$holidays)) break;
}
}
return $newDate;
}
?>
jock ¶
1 year ago
As of PHP 5.3.3, date('c') will produce a string like this:
2014-06-17T16:22:42+02:00
Instead date (DATE_ISO8601) will produce:
2014-06-17T16:23:36+0200
which lacks the semicolon in the timezone part. Both are ISO8601 compliant anyway, but I found that the latter has better compatibility with other languages like python.
david dot leon at gmx dot com ¶
1 year ago
<?php
//date returns microseconds.
function mdate($format, $microtime = null) {
$microtime = explode(' ', ($microtime ? $microtime : microtime()));
if (count($microtime) != 2) return false;
$microtime[0] = $microtime[0] * 1000000;
$format = str_replace('u', $microtime[0], $format);
return date($format, $microtime[1]);
}
?>
echo mdate('Y-m-d H:i:s.u');
2014-05-19 12:41:59.202303
lehal2 at hotmail dot com ¶
3 years ago
here is an example how you can make numeric days of the week from 1 to 7(Monday to Friday)
<?php
$currentdate = mktime(0, 0, 0, date("m") , date("d"), date("Y"));
echo $day_eg1 = date ('N',$currentdate);
echo $day_eg2 = date("N", $today+1 * 24 * 3600);
echo $day_eg3= date("N", $today+2 * 24 * 3600);
echo $day_eg4 = date("N", $today+3 * 24 * 3600);
echo $day_eg5 = date("N", $today+4 * 24 * 3600);
echo $day_eg6 = date("N", $today+5 * 24 * 3600);
echo $day_eg7 = date("N", $today+6 * 24 * 3600);
?>
blinov vyacheslav AT gmail.com ¶
4 years ago
It was oblivious and discouraging that it dont mentioned in docs. If you will use W to get week number be aware:
first days of year can be in a week of previous year, and week number always has leading zero
<?php
echo date("YW", strtotime("2011-01-07")); // gives 201101
echo date("YW", strtotime("2011-01-01")); // gives 201152
echo date("YW", strtotime("2011-12-31")); // gives 201152 too
?>
so you can`t rely on number of week given from this function inside your program if you want to use it for some logic
chubby at chicks dot com ¶
7 years ago
<?php
/**
* Checks wether a date is between an interval
*
* Usage:
*
* // check if today is older than 2008/12/31
* var_dump(currentDayIsInInterval('2008/12/31'));
* // check if today is younger than 2008/12/31
* var_dump(currentDayIsInInterval(null,'2008/12/31'));
* // check if today is between 2008/12/01 and 2008/12/31
* var_dump(currentDayIsInInterval('2008/12/01','2008/12/31'));
*
* Will trigger errors if date is in wrong format, notices if $begin > $end
*
* @param string $begin Date string as YYYY/mm/dd
* @param string $end Date string as YYYY/mm/dd
* @return bool
*/
function currentDayIsInInterval($begin = '',$end = '')
{
$preg_exp = '"[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]"';
$preg_error = 'Wrong parameter passed to function '.__FUNCTION__.' : Invalide date
format. Please use YYYY/mm/dd.';
$interval_error = 'First parameter in '.__FUNCTION__.' should be smaller than
second.';
if(empty($begin))
{
$begin = 0;
}
else
{
if(preg_match($preg_exp,$begin))
{
$begin = (int)str_replace('/','',$begin);
}
else
{
trigger_error($preg_error,E_USER_ERROR);
}
}
if(empty($end))
{
$end = 99999999;
}
else
{
if(preg_match($preg_exp,$end))
{
$end = (int)str_replace('/','',$end);
}
else
{
trigger_error($preg_error,E_USER_ERROR);
}
}
if($end < $begin)
{
trigger_error($interval_error,E_USER_WARNING);
}
$time = time();
$now = (int)(date('Y',$time).date('m',$time).date('j',$time));
if($now > $end or $now < $begin)
{
return false;
}
return true;
}
?>
Jacques Marais ¶
2 years ago
If you want to print something like: Tuesday, the 14th of January, 2014
Use this:
<?php
echo date("l", strtotime("now")).', the'.date(" jS", strtotime("now")).' of'.date(" F, Y", strtotime("now"));
?>
This is because you cannot use words in the date string. If you use words in the date string it will be seen as a format character
So if you use:
<?php
echo date("l, the jS of F, Y", strtotime("now"));
?>
It will print something like: Tuesday, 3108Europe/Berlin 14th 2014f January, 2014
Ryan ¶
1 year ago
That is just too hard anyone have it easier terms for a lad who only has internet for 5 mis a day cause he has to walk his pet peanut
matt ¶
4 years ago
date() has some strange behavior at extremely high values:
<?php
echo "9223372036854775805: " . date("Y-m-d g:i:s a", 9223372036854775805) . "\n";
echo "9223372036854775806: " . date("Y-m-d g:i:s a", 9223372036854775806) . "\n";
echo "9223372036854775807: " . date("Y-m-d g:i:s a", 9223372036854775807) . " (0x7FFFFFFFFFFFFFFF)\n";
echo "9223372036854775808: " . date("Y-m-d g:i:s a", 9223372036854775808) . "\n";
echo "9223372036854775809: " . date("Y-m-d g:i:s a", 9223372036854775809) . "\n";
echo "9223372036854775810: " . date("Y-m-d g:i:s a", 9223372036854775810) . "\n";
echo "...\n";
echo "9223372036854776832: " . date("Y-m-d g:i:s a", 9223372036854776832) . "\n";
echo "9223372036854776833: " . date("Y-m-d g:i:s a", 9223372036854776833) . "\n";
echo "...\n";
echo "9223372036854778879: " . date("Y-m-d g:i:s a", 9223372036854778879) . "\n";
echo "9223372036854778880: " . date("Y-m-d g:i:s a", 9223372036854778880) . "\n";
echo "...\n";
echo "9223372036854780928: " . date("Y-m-d g:i:s a", 9223372036854780928) . "\n";
echo "9223372036854780929: " . date("Y-m-d g:i:s a", 9223372036854780929) . "\n";
echo "...\n";
echo "9223372036854782975: " . date("Y-m-d g:i:s a", 9223372036854782975) . "\n";
echo "9223372036854782976: " . date("Y-m-d g:i:s a", 9223372036854782976) . "\n";
echo "...\n";
echo "9223372036854785024: " . date("Y-m-d g:i:s a", 9223372036854785024) . "\n";
echo "9223372036854785025: " . date("Y-m-d g:i:s a", 9223372036854785025) . "\n";
echo "...\n";
echo "9223372036854787071: " . date("Y-m-d g:i:s a", 9223372036854787071) . "\n";
echo "9223372036854787072: " . date("Y-m-d g:i:s a", 9223372036854787072) . "\n";
echo "...\n";
echo "9223372036854789120: " . date("Y-m-d g:i:s a", 9223372036854789120) . "\n";
echo "9223372036854789121: " . date("Y-m-d g:i:s a", 9223372036854789121) . "\n";
echo "...\n";
echo "9223372036854791167: " . date("Y-m-d g:i:s a", 9223372036854791167) . "\n";
echo "9223372036854791168: " . date("Y-m-d g:i:s a", 9223372036854791168) . "\n";
echo "...\n";
echo "9223372036854793215: " . date("Y-m-d g:i:s a", 9223372036854793215) . "\n";
echo "9223372036854793216: " . date("Y-m-d g:i:s a", 9223372036854793216) . "\n";
echo "9223372036854793217: " . date("Y-m-d g:i:s a", 9223372036854793217) . "\n";
echo "9223372036854793218: " . date("Y-m-d g:i:s a", 9223372036854793218) . "\n";
?>
Output:
9223372036854775805: 292277026596-12-04 10:30:05 am
9223372036854775806: 292277026596-12-04 10:30:06 am
9223372036854775807: 292277026596-12-04 10:30:07 am (0x7FFFFFFFFFFFFFFF)
9223372036854775808: 292277026596-12-04 10:30:08 am
9223372036854775809: 292277026596-12-04 10:30:08 am
9223372036854775810: 292277026596-12-04 10:30:08 am
...
9223372036854778879: 292277026596-12-04 10:30:08 am
9223372036854778880: 292277026596-12-04 11:04:16 am
...
9223372036854778879: 292277026596-12-04 11:04:16 am
9223372036854778880: 292277026596-12-04 11:38:24 am
...
9223372036854780928: 292277026596-12-04 11:38:24 am
9223372036854780929: 292277026596-12-04 12:12:32 pm
...
9223372036854782975: 292277026596-12-04 12:12:32 pm
9223372036854782976: 292277026596-12-04 12:46:40 pm
...
9223372036854785024: 292277026596-12-04 12:46:40 pm
9223372036854785025: 292277026596-12-04 1:20:48 pm
...
9223372036854787071: 292277026596-12-04 1:20:48 pm
9223372036854787072: 292277026596-12-04 1:54:56 pm
...
9223372036854789120: 292277026596-12-04 1:54:56 pm
9223372036854789121: 292277026596-12-04 2:29:04 pm
...
9223372036854791167: 292277026596-12-04 2:29:04 pm
9223372036854791168: 292277026596-12-04 3:03:12 pm
...
9223372036854793215: 292277026596-12-04 3:03:12 pm
9223372036854793216: 292277026596-12-04 3:03:12 pm
9223372036854793217: -292277022657-01-27 8:37:04 am
9223372036854793218: -292277022657-01-27 8:37:04 am
---
So, the last reliable unix timecode is 9223372036854775808 (0x1000000000000000). Not that you would probably ever need a date that high.
Manu Manjunath ¶
2 years ago
If you want to use "u" format specifier for micrseconds without changing to DateTime object, you may write a function as below:
<?php
/**
* Quick replacement to date() function to handle the 'u' format specifier (for microseconds)
* @param string $format Date format string - the same format string you would pass to date() function
* @param float $timestamp [optional] Unix timestamp with microseconds - Typically output of <b>microtime(true)</b>
* @return string Formatted string
*/
function date_with_micro($format, $timestamp = null) {
if (is_null($timestamp) || $timestamp === false) {
$timestamp = microtime(true);
}
$timestamp_int = (int) floor($timestamp);
$microseconds = (int) round(($timestamp - floor($timestamp)) * 1000000.0, 0);
$format_with_micro = str_replace("u", $microseconds, $format);
return date($format_with_micro, $timestamp_int);
}
?>
You can safely replace your date() function with date_with_micro().
krejci dot info at seznam dot cz ¶
8 months ago
I recommend to use "/" instead of "-" when creating dates:
<?
if( date( 'd/m' ) >= date_create( '01/09' ) ) { }
?>
akshayinbox at gmail dot com ¶
8 months ago
When using date(), be sure to "double-escape" certain characters, for example, if printing the word "at", double escape "t" otherwise it will be treated as "tab" simply leading to a space being inserted.
Example:
<?php echo "Last updated ".date("M j<\s\u\p>S</\s\u\p\>, Y \a\\t h:i A"); ?>
will output
Last updated Aug 23rd 2015 at 2:47 PM
(assuming today is Aug 23rd 2015 and it is 2:47 PM)
