/**

* 時間和日期

* 1.unix時間戳

* 以32位整數表示的格林威治時間

* 時間戳是從1970年1月1日0點0分0秒到現在的開始計時

* 方便我們計算使用

* 處理的時間在1902年-2038年之內是有效的(時間戳不能為負數)

* 2.在php中獲取日期和時間

* time()

* getDate()

* getTimeOfDay()

* date_sunrise()

* date_sunset()

* 3.格式化輸出

* date($str,[timestamp]);(查看使用的符號)

* 4.將日期和時間編程unix時間戳

* mktime($hour, $minute, $second, $month, $day, $year, $is_dst)

* 如果只想傳喚日期，則前三個參數傳入0即可

* 5.修改php的默認時區

* 最好服務器的時間，沒半個小時與世界時間同步一下

* php.ini 的 date.timezone

* 或者

* ini_set("date.timezone", "ETC/GMT-8");

* date_default_timezone_set("ETC/GMT-8");(php5特性)

* 6.使用微妙計算php腳本的執行時間

* microtime();(帶有boolean參數的是php5的新特性)

*

* 示例：日歷類

*/

//設置時區(參數去查看php手冊的參數列表)

//date_default_timezone_set("ETC/GMT-8");

ini_set("date.timezone", "ETC/GMT-8");

//獲取時間

$time = time();

echo $time."
";

$date = @getDate();

var_dump($date)."
";

$timeofday = @getTimeOfDay();

var_dump($timeofday)."
";

$date_sunrise = @date_sunrise();

echo $date_sunrise."
";

$date_sunset = @date_sunset();

echo $date_sunset."
"."
";

//格式化日期和時間

echo @date("Y-m-d H:i:s",time())."
";

echo @date("Y-m-d H:i:s")."
"."
";

//轉換unix時間戳

echo @date("Y-m-d H:i:s",@mktime(12,29,22))."
";

echo @date("Y-m-d H:i:s",@mktime(0,0,0,12,2002))."
";

echo @date("Y-m-d H:i:s",@mktime(0,0,0,12,36,2007))."
";

echo @date("Y-m-d H:i:s",@mktime(0,0,0,1,1,99))."
";

//計算年齡方法

@list($year,$month,$day)=@explode("-", $_GET["birthday"]);

$agestamp = time()-@mktime(0,0,0,$month,$day,$year);

$age = $agestamp/(60*60*24*365);

echo $age."
";

//使用微妙計算php的時間

class Time{

private $starTime;

private $stopTime;

function __construct(){

$this->starTime = 0;

$this->stopTime = 0;

}

function start(){

$this->starTime=microtime(true);

}

function stop(){

$this->stopTime=microtime(true);

}

function speat(){

//四舍五入四位

return round($this->stopTime-$this->starTime,4);

}

}

$timer = new Time();

$timer->start();

for ($i=0;$i<10000;$i++){}

$timer->stop();

echo $timer->speat();

include 'calendar.class.php';

$calendar = new Calendar();

$calendar->out();

?>

table{

border:1px;

}

.fonth{

color:white;

background:blue;

}

th{

width:30px;

}

form{

margin: 0px;

padding: 0px;

}

class Calendar{

//當月的第一天對應周幾

private $star_weekday;

//當月的天數

private $days;

private $year;

private $month;

function __construct(){

$this->year=isset($_GET["year"])?$_GET["year"]:date("Y");

$this->month=isset($_GET["month"])?$_GET["month"]:date("m");

$this->star_weekday = date("w",mktime(0,0,0,$this->month,1,$this->year));

$this->days = date("t",mktime(0,0,0,$this->month,1,$this->year));

}

function out(){

echo "

$this->changeDate("date.php");

$this->weekList();

$this->dayList();

echo "

";

}

/**

* 循環輸出星期

* Enter description here ...

*/

private function weekList(){

$week = array("日","一","二","三","四","五","六");

echo "

";

for ($i=0;$i

echo "

".$week[$i]."";

}

echo "

";

}

/**

* 循環輸出天數

* Enter description here ...

*/

private function dayList() {

echo "

";

//輸出空格

for ($j=0;$jstar_weekday;$j++){

echo "

";

}

for ($i=1;$idays;$i++){

$j++;

if ($i==date("d"))

echo "

".$i."";

else

echo "

".$i."";

if ($j%7==0) {

echo "

";;

}

}

while ($j%7==0){

echo "

";

$j++;

}

echo "

";

}

private function prevYear($year,$month){

$year=$year-1;

if ($year<1970)

$year = 1970;

return "year={$year}&month={$month}";

}

private function prevMonth($year,$month){

if ($month==1){

$year=$year-1;

if ($year<1970)$year = 1970;

$month=12;

}else{

$month=$month-1;

}

return "year={$year}&month={$month}";

}

private function nextYear($year,$month){

$year=$year+1;

if ($year>2038)

$year = 2038;

return "year={$year}&month={$month}";

}

private function nextMonth($year,$month){

if ($month==12){

$year=$year+1;

if ($year>2038)$year = 2038;

$month=1;

}else{

$month=$month+1;

}

return "year={$year}&month={$month}";

}

private function changeDate($url=""){

echo "

";

echo "

"."<";

echo "

"."";

echo "

";

echo "

";

echo '';

for ($y = 1970;$y<2039;$y++){

$selected = ($y==$this->year)?"selected":"";

echo "".$y."";

}

echo "";

echo '';

for ($m = 1;$m<13;$m++){

$selected = ($m==$this->month)?"selected":"";

echo "".$m."";

}

echo "";

echo "

";

echo "

";

echo "

".">"."";

echo "

".">>"."";

echo "

";

}

}

?>

源碼下載：

php教程學習筆記

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