PHP中時間和日期函數(shù)總結(jié)
Jun 21, 2016 am 09:15 AM函數(shù)
PHP中所有函數(shù)都是UNIX紀(jì)元的,即從1970年1月1日開始的。日期是從這個時候開始的秒數(shù)。當(dāng)一個函數(shù)調(diào)用從這時候計(jì)的秒數(shù)時,就把它當(dāng)作(timestamp)時間戳。
本地時間函數(shù)
1. string date(string format,inieger timestamp)
該函數(shù)返回一個表示時間的字符串,是由string format 控制的。
如:
print(date("Y年 m月d日");//輸出當(dāng)前,年月日.
print(date("Y年 m月d日",60*60*24*365*10);//輸出1980年1月1日.
?>
也許你會問,怎麼沒有timestamp呢?若timestamp為空時,或不寫時,表示使用當(dāng)前時間一刻timestamp.
表示年份的控制符: Y---四位的年份 y---兩位的年份
表示月份的控制符: m---從1-12的月份 F---英文月份名 M---簡寫的月份名
表示日號的控制符: d---前面有0的月份中日期 j--前面沒有0的日號
表示星期的控制符: l--英文星期 D--簡寫的星期
表示小時的控制符: h--從1到12小時 H---從0到23的小時
表示上下午的控制符 a ---am或pm A---AM或PM
表示分鐘的控制符: i---取值00-59
另外的 z--一年中的日期
2. array getdate(integer timestamp)
該函數(shù)返回一個矩陣.
如:
$current_date=getdate();
print($current_date("hours"));
print($current_date("minutes");
print($current_date("seconds");
?>
說明:
元素 描述
hours 24小時格式的小時
mday 月份中日期
minutes 分鐘
mon 數(shù)字形式的月份
month 月份全稱
seconds 秒數(shù)
wday 從0到6的數(shù)字形式的星期幾
weekday 星期幾的名稱
year 年份
0 時間戳即從1970年1月1日到現(xiàn)在的秒數(shù)
yday 一年中數(shù)字形式的日期
3. boolean checkdate(integer month,integer day,integer year)
該函數(shù)檢查日期是否合法.如:
if(checkdate(2,29,1980))
print("日期合法!n");
?>
4. integer time()
該函數(shù)獲得當(dāng)前時間戳.如:
print(time());//輸出一大串整數(shù)
?>
5. integer mktime(integer hour,integer minutes,integer seconds,integer month, integer day,integer year)
該函數(shù)返回給出日期的時間戳,即從1970年1月1日到現(xiàn)在的秒數(shù).
如某參數(shù)超出范圍,該函數(shù)也可以解釋它,如13月即為第二年的一月.
如:
$currenthour=date("H");
print("50個小時后為:");
print(date("h:i A l F dS,Y",mktime($currenthour+50)));
print("
n");
?>
6. string microtime()
該函數(shù)返回一個字符串,由當(dāng)前時間的毫秒數(shù)+空格+從1970年開始的秒數(shù)
print("start:microtime()
n");
for($index=0;$indexprint("good!");
print("stop:microtime()
n");
?>
還有,各林威治標(biāo)準(zhǔn)時間函數(shù),不常用我就不說了!常用的就這些。

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