php strftime函数的详细用法

//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()));
?>

// Outputs: 12/28/2002 - %V,%G,%Y = 52,2002,2002
echo "12/28/2002 - %V,%Y = " . strftime("%V,%Y",strtotime("12/28/2002")) . "n";

// Outputs: 12/30/2002 - %V,%Y = 1,2003,2002
echo "12/30/2002 - %V,strtotime("12/30/2002")) . "n";

// Outputs: 1/3/2003 - %V,2003
echo "1/3/2003 - %V,strtotime("1/3/2003")) . "n";

// Outputs: 1/10/2003 - %V,%Y = 2,2003
echo "1/10/2003 - %V,strtotime("1/10/2003")) . "n";

/* December 2004 / January 2005
ISOWk M Tu W Thu F Sa Su

---

51 13 14 15 16 17 18 19
52 20 21 22 23 24 25 26
53 27 28 29 30 31 1 2
1 3 4 5 6 7 8 9
2 10 11 12 13 14 15 16 */

// Outputs: 12/23/2004 - %V,2004,2004
echo "12/23/2004 - %V,strtotime("12/23/2004")) . "n";

// Outputs: 12/31/2004 - %V,%Y = 53,2004
echo "12/31/2004 - %V,strtotime("12/31/2004")) . "n";

// Outputs: 1/2/2005 - %V,2005
echo "1/2/2005 - %V,strtotime("1/2/2005")) . "n";

// Outputs: 1/3/2005 - %V,2005,2005
echo "1/3/2005 - %V,strtotime("1/3/2005")) . "n";

?>

// Jan 1: results in: '%e%1%' (%%,e,%%,%e,%%)
$format = '%%e%%%e%%';

// Check for Windows to find and replace the %e
// modifier correctly
if (strtoupper(substr(PHP_OS,3)) == 'WIN') {
$format = preg_replace('#(?<!%)((?:%%)*)%e#','1%#d',$format);
}

echo strftime($format);
?>

'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,'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,'l' => 'Hour in 12-hour format,'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(' ',($description ? " ( {$description} )" : ''),"n";
}
?>