<?php教程echo(strftime("%b %d %Y %X", mktime(20,0,0,12,31,98)));echo(gmstrftime("%b %d %Y %X", mktime(20,0,0,12,31,98)));//输出当前日期、时间和时区echo(gmstrftime("It is %a on %b %d, %Y, %X time zone: %Z",time()));?>

<?phpsetlocale(LC_TIME, "C");echo strftime("%A");setlocale(LC_TIME, "fi_FI");echo strftime(" in Finnish is %A,");setlocale(LC_TIME, "fr_FR");echo strftime(" in French %A and");setlocale(LC_TIME, "de_DE");echo strftime(" in German %A.\n");?>

<?php/*   December 2002 / January 2003ISOWk M  Tu W  Thu F  Sa Su----- ----------------------------51   16 17 18 19 20 21 2252   23 24 25 26 27 28 291   30 31  1  2  3  4  52    6  7  8  9 10 11 123   13 14 15 16 17 18 19  */// Outputs: 12/28/2002 - %V,%G,%Y = 52,2002,2002echo "12/28/2002 - %V,%G,%Y = " . strftime("%V,%G,%Y", strtotime("12/28/2002")) . "\n";// Outputs: 12/30/2002 - %V,%G,%Y = 1,2003,2002echo "12/30/2002 - %V,%G,%Y = " . strftime("%V,%G,%Y", strtotime("12/30/2002")) . "\n";// Outputs: 1/3/2003 - %V,%G,%Y = 1,2003,2003echo "1/3/2003 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/3/2003")) . "\n";// Outputs: 1/10/2003 - %V,%G,%Y = 2,2003,2003echo "1/10/2003 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/10/2003")) . "\n";/*   December 2004 / January 2005ISOWk M  Tu W  Thu F  Sa Su----- ----------------------------51   13 14 15 16 17 18 1952   20 21 22 23 24 25 2653   27 28 29 30 31  1  21    3  4  5  6  7  8  92   10 11 12 13 14 15 16  */// Outputs: 12/23/2004 - %V,%G,%Y = 52,2004,2004echo "12/23/2004 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("12/23/2004")) . "\n";// Outputs: 12/31/2004 - %V,%G,%Y = 53,2004,2004echo "12/31/2004 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("12/31/2004")) . "\n";// Outputs: 1/2/2005 - %V,%G,%Y = 53,2004,2005echo "1/2/2005 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/2/2005")) . "\n";// Outputs: 1/3/2005 - %V,%G,%Y = 1,2005,2005echo "1/3/2005 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/3/2005")) . "\n";?>

<?php// Jan 1: results in: '%e%1%' (%%, e, %%, %e, %%)$format = '%%e%%%e%%';// Check for Windows to find and replace the %e // modifier correctlyif (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {  $format = preg_replace('#(?<!%)((?:%%)*)%e#', '\1%#d', $format);}echo strftime($format);?>

<?php// Describe the formats.$strftimeFormats = array(  'A' => 'A full textual representation of the day',  'B' => 'Full month name, based on the locale',  'C' => 'Two digit representation of the century (year divided by 100, truncated to an integer)',  'D' => 'Same as "%m/%d/%y"',  'E' => '',  'F' => 'Same as "%Y-%m-%d"',  'G' => 'The full four-digit version of %g',  'H' => 'Two digit representation of the hour in 24-hour format',  'I' => 'Two digit representation of the hour in 12-hour format',  'J' => '',  'K' => '',  'L' => '',  'M' => 'Two digit representation of the minute',  'N' => '',  'O' => '',  'P' => 'lower-case "am" or "pm" based on the given time',  'Q' => '',  'R' => 'Same as "%H:%M"',  'S' => 'Two digit representation of the second',  'T' => 'Same as "%H:%M:%S"',  'U' => 'Week number of the given year, starting with the first Sunday as the first week',  'V' => 'ISO-8601:1988 week number of the given year, starting with the first week of the year with at least 4 weekdays, with Monday being the start of the week',  'W' => 'A numeric representation of the week of the year, starting with the first Monday as the first week',  'X' => 'Preferred time representation based on locale, without the date',  'Y' => 'Four digit representation for the year',  'Z' => 'The time zone offset/abbreviation option NOT given by %z (depends on operating system)',  'a' => 'An abbreviated textual representation of the day',  'b' => 'Abbreviated month name, based on the locale',  'c' => 'Preferred date and time stamp based on local',  'd' => 'Two-digit day of the month (with leading zeros)',  'e' => 'Day of the month, with a space preceding single digits',  'f' => '',  'g' => 'Two digit representation of the year going by ISO-8601:1988 standards (see %V)',  'h' => 'Abbreviated month name, based on the locale (an alias of %b)',  'i' => '',  'j' => 'Day of the year, 3 digits with leading zeros',  'k' => 'Hour in 24-hour format, with a space preceding single digits',  'l' => 'Hour in 12-hour format, with a space preceding single digits',  'm' => 'Two digit representation of the month',  'n' => 'A newline character ("\n")',  'o' => '',  'p' => 'UPPER-CASE "AM" or "PM" based on the given time',  'q' => '',  'r' => 'Same as "%I:%M:%S %p"',  's' => 'Unix Epoch Time timestamp',  't' => 'A Tab character ("\t")',  'u' => 'ISO-8601 numeric representation of the day of the week',  'v' => '',  'w' => 'Numeric representation of the day of the week',  'x' => 'Preferred date representation based on locale, without the time',  'y' => 'Two digit representation of the year',  'z' => 'Either the time zone offset from UTC or the abbreviation (depends on operating system)',  '%' => 'A literal percentage character ("%")',);// Results.$strftimeValues = array();// Evaluate the formats whilst suppressing any errors.foreach($strftimeFormats as $format => $description){  if (False !== ($value = @strftime("%{$format}"))){    $strftimeValues[$format] = $value;  }}// Find the longest value.$maxValueLength = 2 + max(array_map('strlen', $strftimeValues));// Report known formats.foreach($strftimeValues as $format => $value){  echo "Known format  : '{$format}' = ", str_pad("'{$value}'", $maxValueLength), " ( {$strftimeFormats[$format]} )\n";}// Report unknown formats.foreach(array_diff_key($strftimeFormats, $strftimeValues) as $format => $description){  echo "Unknown format : '{$format}'  ", str_pad(' ', $maxValueLength), ($description ? " ( {$description} )" : ''), "\n";}?>

<?phpecho '本年中的第·' . strftime('%W', strtotime('+2 week midnight -0 second')) . '·周';?>

<?phpecho "現在時間是：" . strftime('%d.%B %Y %H:%M:%S', time());?>

<?phpecho '日期時間格式化為:' . strftime('%d.%B %Y %H:%M:%S', strtotime('2018-10-15'));?>