PHP code example to get system time

//Method 1
echo date("Y-m-d h:i:s");
//Method 2
date_default_timezone_set( 'Asia/Chongqing'); //The system time difference is 8 hours.
$now = getdate(time());
$cur_wday=$now['wday'];
$date = date("Y-m-d H:i:s $cweekday[$cur_wday]");
echo $date;
//by bbs.it-home.org
?>

The letters in the date function represent meaning: a - "am" or "pm" A - "AM" or "PM" B - Swatch Internet Time d - Day of the month, 2 digits with leading zeros, e.g. "01" to "31" D - day of the week, text, 3 letters, e.g. "Fri" F - month, complete text format, such as "January" g - hour, in 12-hour format, without leading zeros, e.g. "1" through "12" G - hour, in 24-hour format, without leading zeros, e.g. "0" through "23" h - Hour, 12-hour format, such as "01" to "12" H - Hour, 24-hour format, such as "00" to "23" i - minute, for example "00" to "59" I (uppercase letter "i") - "1" if it's daylight saving time, "0" otherwise j - The day of the month, without leading zeros, such as "1" through "31" l (lowercase "L") - Day of the week, in full text format, such as "Friday" L - Boolean value indicating whether it is a leap year, such as "0" or "1" m - month, for example "01" to "12" M - Month, text representation, 3 letters, e.g. "Jan" n - month, without leading zeros, e.g. "1" through "12" O - the number of hours from Greenwich Mean Time, for example "+0200" r - Date in RFC 822 format, such as "Thu, 21 Dec 2000 16:01:07 +0200" (new in PHP 4.0.4) s - number of seconds, for example "00" to "59" S - English suffix after the day of the month, 2 characters, such as "st", "nd", "rd" or "th" t - the number of days in a given month, e.g. "28" to "31" T - The time zone where this machine is located, such as "EST" or "MDT" ([Translator's Note] In complete text format under Windows, such as "Eastern Standard Time", the Chinese version will display "China Standard Time".) U - Number of seconds since the Unix epoch (January 1 1970 00:00:00 GMT) w - Day of the week as a number, e.g. "0" (Sunday) to "6" (Saturday) W - Week number of the year in ISO-8601 format, each week starts on Monday (new in PHP 4.1.0) Y - year, 4 digits, for example "1999" y - annual fee, 2 digits, e.g. "99" Z - The time offset in seconds (for example, "-43200" to "43200"). Time zone offsets west of UTC are always negative, and time zone offsets east of UTC are always positive.