(PHP 4, PHP 5, PHP 7, PHP 8)

strtotimeParse about any English textual datetime description into a Unix timestamp


strtotime(string $datetime, ?int $baseTimestamp = null): int|false

The function expects to be given a string containing an English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in baseTimestamp, or the current time if baseTimestamp is not supplied. The date string parsing is defined in Date and Time Formats, and has several subtle considerations. Reviewing the full details there is strongly recommended.


The Unix timestamp that this function returns does not contain information about time zones. In order to do calculations with date/time information, you should use the more capable DateTimeImmutable.

Each parameter of this function uses the default time zone unless a time zone is specified in that parameter. Be careful not to use different time zones in each parameter unless that is intended. See date_default_timezone_get() on the various ways to define the default time zone.

Bağımsız Değişkenler


Bir tarih/zaman dizgesi. Geçerli biçemler Tarih ve Zaman Biçemleri bölümünde açıklanmıştır.


The timestamp which is used as a base for the calculation of relative dates.

Dönen Değerler

Returns a timestamp on success, false otherwise.


Bir tarih/zaman işlevine yapılan her çağrı eğer zaman dilimi ayarı geçerli değilse bir E_WARNING üretir. Ayrıca bakınız: date_default_timezone_set()

Sürüm Bilgisi

Sürüm: Açıklama
8.0.0 baseTimestamp is nullable now.


Örnek 1 A strtotime() example

echo strtotime("now"), "\n";
strtotime("10 September 2000"), "\n";
strtotime("+1 day"), "\n";
strtotime("+1 week"), "\n";
strtotime("+1 week 2 days 4 hours 2 seconds"), "\n";
strtotime("next Thursday"), "\n";
strtotime("last Monday"), "\n";

Örnek 2 Checking for failure

= 'Not Good';

if ((
$timestamp = strtotime($str)) === false) {
"The string ($str) is bogus";
} else {
"$str == " . date('l dS \o\f F Y h:i:s A', $timestamp);



"Relative" date in this case also means that if a particular component of the date/time stamp is not provided, it will be taken verbatim from the baseTimestamp. That is, strtotime('February'), if run on the 31st of May 2022, will be interpreted as 31 February 2022, which will overflow into a timestamp on 3 March. (In a leap year, it would be 2 March.) Using strtotime('1 February') or strtotime('first day of February') would avoid that problem.


If the number of the year is specified in a two digit format, the values between 00-69 are mapped to 2000-2069 and 70-99 to 1970-1999. See the notes below for possible differences on 32bit systems (possible dates might end on 2038-01-19 03:14:07).


The valid range of a timestamp is typically from Fri, 13 Dec 1901 20:45:54 UTC to Tue, 19 Jan 2038 03:14:07 UTC. (These are the dates that correspond to the minimum and maximum values for a 32-bit signed integer.)

For 64-bit versions of PHP, the valid range of a timestamp is effectively infinite, as 64 bits can represent approximately 293 billion years in either direction.


Using this function for mathematical operations is not advisable. It is better to use DateTime::add() and DateTime::sub().

Ayrıca Bakınız

add a note

User Contributed Notes 2 notes

Vyacheslav Belchuk
2 months ago
Be careful when using two numbers as the year. I came across this situation:


echo strtotime('24.11.22');
date('d.m.Y H:i:s', 1669324282)  .  "\n\n";

// But
echo strtotime('24.11.2022');
date('d.m.Y H:i:s', 1669237200);



25.11.2022 00:11:22

24.11.2022 00:00:00
MarkAgius at markagius dot co dot uk
23 days ago
If day of month is 12 or less, or year is entered as a two digit number and less than 31 or 12 then you may get the wrong time value.
If you know the format used with the date string, then use the following code: (PHP version 5.5 or later)
function getStrtotime($timeDateStr, $formatOfStr="j/m/Y"){
  // Same as strtotime() but using the format $formatOfStr.
  // Works with PHP version 5.5 and later.
  // On error reading the time string, returns a date that never existed. 3/09/1752 Julian/Gregorian calendar switch.
  $timeStamp = DateTimeImmutable::createFromFormat($formatOfStr,$timeDateStr);
    // Bad date string or format string.
    return -6858133619; // 3/09/1752
  } else {
    // Date string and format ok.
    return $timeStamp->format("U"); // UNIX timestamp from 1/01/1970,  0:00:00 gmt

print date("j/m/Y", getStrtotime("1/02/2022", "j/m/Y"))." Standard format. (j)<BR>\n";
print date("j/m/Y", getStrtotime("1/02/2022", "d/m/Y"))." Standard format. (d)<BR>\n";
print date("j/m/Y", getStrtotime("1/02/2022", "j/m/y"))." Standard format. (y) &lt;-- Bad date as 2022 is not two digits.<BR>\n";
print date("j/m/Y", getStrtotime("21/02/2022", "j/m/Y"))." Standard format. (j)<BR>\n";
print date("j/m/Y", getStrtotime("21/02/2022", "d/m/Y"))." Standard format. (d)<BR>\n";
print date("j/m/Y", getStrtotime("2/01/2022", "m/j/Y"))." US format.<BR>\n";
print date("j/m/Y", getStrtotime("2-01-22", "m-j-y"))." Two digit year, US format. (Y)<BR>\n";
print date("j/m/Y", getStrtotime("2-01-22", "m-j-Y"))." Two digit year, US format. (y) &lt;-- Wrong year if two digits.<BR>\n";
print date("j/m/Y", getStrtotime("3/09/1752", "j/m/Y"))." No such date.<BR>\n";
print date("j/m/Y", getStrtotime("50/00/19999", "j/m/Y"))." Bad date string.<BR>\n";
print date("j/m/Y", getStrtotime("1-02-2022", "j/m/Y"))." Wrong - or / used.<BR>\n";
1/02/2022 Standard format. (j)
1/02/2022 Standard format. (d)
3/09/1752 Standard format. (y) <-- Bad date as 2022 is not two digits.
21/02/2022 Standard format. (j)
21/02/2022 Standard format. (d)
1/02/2022 US format.
1/02/2022 Two digit year, US format. (Y)
1/02/0022 Two digit year, US format. (y) <-- Wrong year if two digits.
3/09/1752 No such date.
3/09/1752 Bad date string.
3/09/1752 Wrong - or / used.
To Top