From 4b072dc2dfd7c400c01a7b187a15cd214baaf438 Mon Sep 17 00:00:00 2001 From: Vencislav Atanasov Date: Mon, 16 Oct 2023 21:14:47 +0300 Subject: [PATCH] Add backwards-compatible strftime polyfill for PHP 8.1+ --- schedule/parse.php | 3 + schedule/php-8.1-strftime.php | 217 ++++++++++++++++++++++++++++++++++ 2 files changed, 220 insertions(+) create mode 100644 schedule/php-8.1-strftime.php diff --git a/schedule/parse.php b/schedule/parse.php index ba1bb82..fa7956f 100644 --- a/schedule/parse.php +++ b/schedule/parse.php @@ -1,4 +1,7 @@ array( diff --git a/schedule/php-8.1-strftime.php b/schedule/php-8.1-strftime.php new file mode 100644 index 0000000..d092030 --- /dev/null +++ b/schedule/php-8.1-strftime.php @@ -0,0 +1,217 @@ + + */ +function strftime (string $format, $timestamp = null, ?string $locale = null) : string { + if (!($timestamp instanceof DateTimeInterface)) { + $timestamp = is_int($timestamp) ? '@' . $timestamp : (string) $timestamp; + + try { + $timestamp = new DateTime($timestamp); + } catch (Exception $e) { + throw new InvalidArgumentException('$timestamp argument is neither a valid UNIX timestamp, a valid date-time string or a DateTime object.', 0, $e); + } + } + + $timestamp->setTimezone(new DateTimeZone(date_default_timezone_get())); + + if (empty($locale)) { + // get current locale + $locale = setlocale(LC_TIME, '0'); + } + // remove trailing part not supported by ext-intl locale + $locale = preg_replace('/[^\w-].*$/', '', $locale); + + $intl_formats = [ + '%a' => 'EEE', // An abbreviated textual representation of the day Sun through Sat + '%A' => 'EEEE', // A full textual representation of the day Sunday through Saturday + '%b' => 'MMM', // Abbreviated month name, based on the locale Jan through Dec + '%B' => 'MMMM', // Full month name, based on the locale January through December + '%h' => 'MMM', // Abbreviated month name, based on the locale (an alias of %b) Jan through Dec + ]; + + $intl_formatter = function (DateTimeInterface $timestamp, string $format) use ($intl_formats, $locale) { + $tz = $timestamp->getTimezone(); + $date_type = IntlDateFormatter::FULL; + $time_type = IntlDateFormatter::FULL; + $pattern = ''; + + switch ($format) { + // %c = Preferred date and time stamp based on locale + // Example: Tue Feb 5 00:45:10 2009 for February 5, 2009 at 12:45:10 AM + case '%c': + $date_type = IntlDateFormatter::LONG; + $time_type = IntlDateFormatter::SHORT; + break; + + // %x = Preferred date representation based on locale, without the time + // Example: 02/05/09 for February 5, 2009 + case '%x': + $date_type = IntlDateFormatter::SHORT; + $time_type = IntlDateFormatter::NONE; + break; + + // Localized time format + case '%X': + $date_type = IntlDateFormatter::NONE; + $time_type = IntlDateFormatter::MEDIUM; + break; + + default: + $pattern = $intl_formats[$format]; + } + + // In October 1582, the Gregorian calendar replaced the Julian in much of Europe, and + // the 4th October was followed by the 15th October. + // ICU (including IntlDateFormattter) interprets and formats dates based on this cutover. + // Posix (including strftime) and timelib (including DateTimeImmutable) instead use + // a "proleptic Gregorian calendar" - they pretend the Gregorian calendar has existed forever. + // This leads to the same instants in time, as expressed in Unix time, having different representations + // in formatted strings. + // To adjust for this, a custom calendar can be supplied with a cutover date arbitrarily far in the past. + $calendar = IntlGregorianCalendar::createInstance(); + $calendar->setGregorianChange(PHP_INT_MIN); + + return (new IntlDateFormatter($locale, $date_type, $time_type, $tz, $calendar, $pattern))->format($timestamp); + }; + + // Same order as https://www.php.net/manual/en/function.strftime.php + $translation_table = [ + // Day + '%a' => $intl_formatter, + '%A' => $intl_formatter, + '%d' => 'd', + '%e' => function ($timestamp) { + return sprintf('% 2u', $timestamp->format('j')); + }, + '%j' => function ($timestamp) { + // Day number in year, 001 to 366 + return sprintf('%03d', $timestamp->format('z')+1); + }, + '%u' => 'N', + '%w' => 'w', + + // Week + '%U' => function ($timestamp) { + // Number of weeks between date and first Sunday of year + $day = new DateTime(sprintf('%d-01 Sunday', $timestamp->format('Y'))); + return sprintf('%02u', 1 + ($timestamp->format('z') - $day->format('z')) / 7); + }, + '%V' => 'W', + '%W' => function ($timestamp) { + // Number of weeks between date and first Monday of year + $day = new DateTime(sprintf('%d-01 Monday', $timestamp->format('Y'))); + return sprintf('%02u', 1 + ($timestamp->format('z') - $day->format('z')) / 7); + }, + + // Month + '%b' => $intl_formatter, + '%B' => $intl_formatter, + '%h' => $intl_formatter, + '%m' => 'm', + + // Year + '%C' => function ($timestamp) { + // Century (-1): 19 for 20th century + return floor($timestamp->format('Y') / 100); + }, + '%g' => function ($timestamp) { + return substr($timestamp->format('o'), -2); + }, + '%G' => 'o', + '%y' => 'y', + '%Y' => 'Y', + + // Time + '%H' => 'H', + '%k' => function ($timestamp) { + return sprintf('% 2u', $timestamp->format('G')); + }, + '%I' => 'h', + '%l' => function ($timestamp) { + return sprintf('% 2u', $timestamp->format('g')); + }, + '%M' => 'i', + '%p' => 'A', // AM PM (this is reversed on purpose!) + '%P' => 'a', // am pm + '%r' => 'h:i:s A', // %I:%M:%S %p + '%R' => 'H:i', // %H:%M + '%S' => 's', + '%T' => 'H:i:s', // %H:%M:%S + '%X' => $intl_formatter, // Preferred time representation based on locale, without the date + + // Timezone + '%z' => 'O', + '%Z' => 'T', + + // Time and Date Stamps + '%c' => $intl_formatter, + '%D' => 'm/d/Y', + '%F' => 'Y-m-d', + '%s' => 'U', + '%x' => $intl_formatter, + ]; + + $out = preg_replace_callback('/(?format($replace); + } else { + $result = $replace($timestamp, $pattern); + } + + switch ($prefix) { + case '_': + // replace leading zeros with spaces but keep last char if also zero + return preg_replace('/\G0(?=.)/', ' ', $result); + case '#': + case '-': + // remove leading zeros but keep last char if also zero + return preg_replace('/^0+(?=.)/', '', $result); + } + + return $result; + }, $format); + + $out = str_replace('%%', '%', $out); + return $out; +}