have you ever had the need to programmatically convert a date()
compatible date formatting string with one compatible for strftime()?
I had this problem recently when I had to l10n an existing app (and
support legacy data - which include date() formatting strings - at the
same time) ... I came up with this (it's not very exciting but it might save
someone the rather mindnumbing job of trying to correlate the date()
and strftime() formatting codes - also note that the correlation is not 100%,
in cases where I couldn't find a real/proper match I just did what I thought
was best - which sometimes meant leaving the replacement blank):
function getSTFDateFormat($fmt)
{
static $dfMap = array(
'd' => '%d', // Day of the month, 2 digits with leading zeros
01 to 31
'D' => '%a', // A textual representation of a day, three letters
Mon through Sun
'j' => '%e', // Day of the month without leading zeros 1 to 31
'l' => '%A', // A full textual representation of the day of the week
Sunday through Saturday
'N' => '%u', // ISO-8601 numeric representation of the day of the
week (added in PHP 5.1.0) 1 (for Monday)
through 7 (for Sunday)
'S' => '', // English ordinal suffix for the day of the month, 2
characters st, nd, rd or th. Works well with j
'w' => '%w', // Numeric representation of the day of the week
0 (for Sunday) through 6 (for Saturday)
'z' => '%j', // The day of the year (starting from 0) 0
through 365
'W' => '%V', // ISO-8601 week number of year, weeks starting on
Monday (added in PHP 4.1.0) Example: 42 (the
42nd week in the year)
'F' => '%B', // A full textual representation of a month, such as
January or March January through December
'm' => '%m', // Numeric representation of a month, with leading
zeros 01 through 12
'M' => '%b', // A short textual representation of a month, three
letters Jan through Dec
'n' => '%m', // Numeric representation of a month, without leading
zeros 1 through 12
't' => '', // Number of days in the given month 28 through 31
'L' => '', // Whether it's a leap year 1 if it is a leap year,
0 otherwise.
'o' => '%G', // ISO-8601 year number. This has the same value as Y,
except that if the ISO week number (W)
belongs to the previous or next year, that year is used instead. (added in PHP
5.1.0) Examples: 1999 or 2003
'Y' => '%Y', // A full numeric representation of a year, 4 digits
Examples: 1999 or 2003
'y' => '%y', // A two digit representation of a year
Examples: 99 or 03
'a' => '%p', // Lowercase Ante meridiem and Post meridiem am or pm
'A' => '%p', // Uppercase Ante meridiem and Post meridiem AM or PM
'B' => '', // Swatch Internet time 000 through 999
'g' => '%I', // 12-hour format of an hour without leading zeros
1 through 12
'G' => '%H', // 24-hour format of an hour without leading zeros
0 through 23
'h' => '%I', // 12-hour format of an hour with leading zeros
01 through 12
'H' => '%H', // 24-hour format of an hour with leading zeros
00 through 23
'i' => '%M', // Minutes with leading zeros 00 to 59
's' => '%S', // Seconds, with leading zeros 00 through 59
'e' => '%Z', // Timezone identifier (added in PHP 5.1.0)
Examples: UTC, GMT, Atlantic/Azores
'I' => '', // Whether or not the date is in daylight saving time
1 if Daylight Saving Time, 0 otherwise.
'O' => '', // Difference to Greenwich time (GMT) in hours
Example: +0200
'P' => '', // Difference to Greenwich time (GMT) with colon
between hours and minutes (added in PHP 5.1.3)
Example: +02:00
'T' => '%z', // Timezone setting of this machine Examples: EST,
MDT ...
'Z' => '', // Timezone offset in seconds. The offset for
timezones west of UTC is always negative, and for
those east of UTC is always positive. -43200 through 50400
'c' => '%c', // ISO 8601 date (added in PHP 5)
2004-02-12T15:19:21+00:00
'r' => '%a, %m %b %Y %T', // RFC 2822 formatted date
Example: Thu, 21 Dec 2000 16:01:07 +0200
'U' => '', // Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
);
if (strpos($fmt, '%') === false) {
$find = array_keys($dfMap);
foreach ($find as $k => $v) {
$find[$k] = '#(?<!%)'.$v.'#'; // negative lookbehind assertion
(must not be preceeded by a % sign)
}
// try to convert date() format to strftime() format
$fmt = preg_replace($find, array_values($dfMap), $fmt);
}
return $fmt;
}
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