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strtotime
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strtotime

Name

strtotime — Converts a string representation of a date or time to a UNIX timestamp.

Synopsis

int strtotime(timestring[, timestamp]); string timestring: Time string to be converted int timestamp (optional): Optional timestamp to use instead of the current time

Returns

UNIX timestamp; FALSE on failure

Description

strtotime() is capable of taking a string containing a date or time specification in a variety of nearly natural-language formats and converting it into a simple UNIX timestamp. The string given may be very naturally expressed, using a combination of digits and any of the following strings. These strings may be pluralized with an appended s if appropriate, and are not case-sensitive. These strings are not localized, and must be used in English.

Unless the timestamp parameter is given, the result will be calculated relative to the current system time. To cause the result to be calculated relative to another time, give the desired time as a UNIX timestamp as timestamp .

Month and Day Names and Abbreviations:

january
february
march
april
may
june
july
august
september
sept
october
november
december
sunday
monday
tuesday
tues
wednesday
wednes
thursday
thur
thurs
friday
saturday

Time Values and Specifiers:

am: the time is before noon
pm: the time is noon or later
year: one year; for example, "next year"
month: one month; for example, "last month"
fortnight: two weeks; for example, "a fortnight ago"
week: one week
day: a day
hour: an hour
minute: a minute
min: same as minute
second: a second
sec: same as second

Relative and Ordinal Specifiers:

ago: past time relative to now; such as "24 hours ago"
tomorrow: 24 hours later than the current date and time
yesterday: 24 hours earlier than the current date and time
today: the current date and time
now: the current date and time
last: modifier meaning "the preceding"; for example, "last tuesday"
this: the given time during the current day or the next occurrence of the given time; for example, "this 7am" gives the timestamp for 07:00 on the current day, while "this week" gives the timestamp for one week from the current time
next: modifier meaning the current time value of the subject plus one; for example, "next hour"
first: ordinal modifier, esp. for months; for example, "May first" (actually, it's just the same asnext)
third: see first (note that there is no "second" for ordinality, since that would conflict with thesecond time value)
fourth: see first
fifth: see first
sixth: see first
seventh: see first
eighth: see first
ninth: see first
tenth: see first
eleventh: see first
twelfth: see first

Time Zones:

gmt: Greenwich Mean Time
ut: Coordinated Universal Time
utc: same as ut
wet: Western European Time
bst: British Summer Time
wat: West Africa Time
at: Azores Time
ast: Atlantic Standard Time
adt: Atlantic Daylight Time
est: Eastern Standard Time
edt: Eastern Daylight Time
cst: Central Standard Time
cdt: Central Daylight Time
mst: Mountain Standard Time
mdt: Mountain Daylight Time
pst: Pacific Standard Time
pdt: Pacific Daylight Time
yst: Yukon Standard Time
ydt: Yukon Daylight Time
hst: Hawaii Standard Time
hdt: Hawaii Daylight Time
cat: Central Alaska Time
akst: Alaska Standard Time
akdt: Alaska Daylight Time
ahst: Alaska-Hawaii Standard Time
nt: Nome Time
idlw: International Date Line West
cet: Central European Time
met: Middle European Time
mewt: Middle European Winter Time
mest: Middle European Summer Time
mesz: Middle European Summer Time
swt: Swedish Winter Time
sst: Swedish Summer Time
fwt: French Winter Time
fst: French Summer Time
eet: Eastern Europe Time, USSR Zone 1
bt: Baghdad Time, USSR Zone 2
zp4: USSR Zone 3
zp5: USSR Zone 4
zp6: USSR Zone 5
wast: West Australian Standard Time
wadt: West Australian Daylight Time
cct: China Coast Time, USSR Zone 7
jst: Japan Standard Time, USSR Zone 8
east: Eastern Australian Standard Time
eadt: Eastern Australian Daylight Time
gst: Guam Standard Time, USSR Zone 9
nzt: New Zealand Time
nzst: New Zealand Standard Time
nzdt: New Zealand Daylight Time
idle: International Date Line East

Version

PHP 3 since 3.0.12, PHP 4 since 4.0b2

Example

Example 208. Calculating dates and times using natural strings

/* When tested at 10:25 on April 17 2001,
 * the following code produced this output:
 * 10:25:31 Tuesday, Apr 17
 * 18:00:00 Tuesday, Apr 17
 * 10:25:31 Tuesday, May 15
 * 00:00:00 Monday, Apr 16
 * 10:25:31 Wednesday, Apr 18
 * 14:00:00 Monday, Apr 16
 * 07:00:00 Thursday, Apr  5
 * 10:25:31 Tuesday, Apr 17
 */

function test_time($time_string) {
    echo strftime("%X %A, %b %e\n", strtotime($time_string));
}

test_time('now');
test_time('4pm + 2 Hours');
test_time('now + 2 fortnights');
test_time('last Monday');
test_time('tomorrow');
test_time('2pm yesterday');
test_time('7am 12 days ago');

/* Calculate relative to next week, using strtotime() to generate
 * both the final result and the relative time for now.
 * This example produces, in a roundabout way, the current date. */
$now = strtotime('next week');
echo strftime("%X %A, %b %e\n", strtotime('last week', $now));

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.