PHP date () function detailed parameters

Add date_default_timezone_set (PRC) to the front of the page );  /*  Change the time to Beijing time. The default PhP5 time is Greenwich Mean Time.  */  Date  () : "Am" or "PM" A : "Am" or "PM" D : Day (s), double-digit characters. If not, zeros are added. From "01" to "31" D : The day of the week, with three English letters, for example, "fri" F : Month. Full English name, for example, "January" H : 12-hour, from "01" to "12" H : Hour in 24-hour format, from "00" to "23"G : The hour in 12-hour format. The value ranges from "1" to "12" G : The hour in the 24-hour format. The value ranges from 0 to 23" J : A few days, not zero; from "1" to "31" L : The day of the week. Full English name, for example, "Friday" M : Month, double digit, from "01" to "12" N : Month, double-digit, not zero; from "1" to "12" M : Month, with three English letters, for example, "Jan" S : Seconds; from "00" to "59" S : Ending with an English sequence, two English letters, for example, "21th" T : Specifies the number of days of the month, from "28" to "31" U :Total number of seconds W : Number of weeks, from "0 (Sunday)" to "6 (Saturday )" Y : Year, four digits y : Year, double-digit Z: The day of the year; from "1" to "366" ================================== ==================================== 1, year-month- Day indicates that the year can be written in uppercase y and lowercase y; month can be written in uppercase F, uppercase M, lowercase m, and lowercase N (two types of characters and numbers respectively ); indicates the date suffix.  Echo   Date ('Y-m-J' ); 2007-02-6 Echo   Date ('Y-n-J' ); 07-2-6Uppercase y indicates four digits of the year, while lowercase y indicates two digits of the Year. lowercase M indicates the number of the month (with the leading digit), while lowercase n indicates the number of the month without the leading digit.  Echo   Date ('Y-m-J' ); 2007-feb-6 Echo   Date ('Y-m-d' ); 2007-02-06 Uppercase M indicates the three abbreviated characters of the month, while lowercase M indicates the number of the month (with the leading 0). Without uppercase J, only lowercase J indicates the date of the month, no leading O; Use lowercase d if the month has a leading character.  Echo   Date ('Y-m-J' ); 2007-feb-6 Echo   Date ('Y-F-js'); 2007-February- 6 th Capital M indicates the three characters of the month, while F indicates the English full write of the month. (No lowercase f) uppercase s indicates the suffix of the date, such as "St", "nd", "RD", and "th". For details, see the date number. 2, hour: minute: By default, PHP interprets the display time as "Greenwich Mean Time", which is 8 hours different from our local time.  Echo   Date ('G: I: s' ); 5:56:57 AM  Echo   Date ('H: I: s' ); 05:56:57 Am lowercase G indicates the 12-hour system, with no leading 0, while lowercase h indicates the 12-hour system with leading 0. When the 12-hour format is used, it indicates that upper afternoon, lower case A indicates lower case "am" and "PM", and upper case A indicates upper case "am" and "PM ".  Echo  Date ('G: I: s' ); 14:02:26 Uppercase G indicates the number of hours in the 24-hour format, but does not contain the leading value. uppercase h indicates the number of hours in the 24-hour format. Summary: the letter G indicates that the hour does not contain the leading value, the letter h indicates the hour with the leading; the lowercase G, H indicates the 12-hour system, and the upper case G, H indicates the 24-hour system. 3 , Leap year, week, day  Echo   Date ('L' ); Whether this year is a leap year: 0 Echo   Date ('L' ); Today is: Tuesday  Echo   Date ('D'); Today is: Tue capital L indicates whether this year is a leap year, Boolean value, True returns 1, otherwise it is 0; lowercase L indicates the day of the week in English (Tuesday ); however, uppercase D is used to represent the three abbreviation of the day of the week (Tue ).  Echo   Date ('W' ); Today's week: 2 Echo   Date ('W' ); This week is the first day of the year 06 Weekly lowercase W indicates the day of the week, and numeric indicates the number of weeks in a year.  Echo   Date ('T' ); This month is 28 Days  Echo   Date ('Z' ); Today is the first day of this year 36 Day lowercase t indicates the number of days in the current month. Z indicates the day in the current year. 4 , Other  Echo   Date ('T' ); UTC capital T indicates the time zone setting of the server  Echo   Date ('I' ); 0 If I is used to determine whether the current value is success, 1 is returned for true. Otherwise, 0 is returned.  Echo   Date ('U' ); 1170769424The upper-case u table shows the total number of seconds from January 1, January 1, 1970 to the present, which is the Unix timestamp of the UNIX time era.  Echo   Date ('C' ); 2007-02-06t14: 24: 43 + 00: 00 Lowercase C indicates the iso8601 date, in the format of yyyy -MM-DD, separated by the letter T, date and time, in the format of HH: mm: SS, the time zone is expressed by the deviation of Greenwich Mean Time (GMT.  Echo   Date ('R' ); TUE , 06 Feb 2007 14:25:52 + 0000 Lowercase R indicates the rfc822 date. 5 , Format time  Echo   $ Row ["T_time"]; returns 12:08:00 Echo   Date ("Y-m-d ", Strtotime ( $ Row ["T_time "]). Note that because  $ Row ["T_time"] The obtained time is already a string, so you need to use strtotime (string-to-timestamp) to go through it. Otherwise, the error 1970-01-01 will be output.