php date

<?php
echo "现在时间是 " . date("h:i:sa");
?>

Getting Time Zone

<?php
date_default_timezone_set("Asia/Shanghai");
echo "当前时间是 " . date("h:i:sa");
?>

The mktime() function returns the Unix timestamp of a date. A Unix timestamp contains the number of seconds between the Unix epoch (January 1, 1970 00:00:00 GMT) and the specified time.

Syntax

mktime(hour,minute,second,month,day,year)

The following example uses a series of parameters in the mktime() function to Create date and time:

Example

<?php
$d=mktime(9, 12, 31, 6, 10, 2015);
echo "创建日期是 " . date("Y-m-d h:i:sa", $d);
?>

Create date with string through PHP strtotime()

PHP strtotime() function is used to convert human-readable string Convert to Unix time.

Syntax

strtotime(time,now)

The following example creates date and time through the strtotime() function:

Example

<?php
$d=strtotime("10:38pm April 15 2015");
echo "创建日期是 " . date("Y-m-d h:i:sa", $d);
?>

PHP is really smart about converting strings to dates, so you can use a variety of values:

Examples

<?php
$d=strtotime("tomorrow");
echo date("Y-m-d h:i:sa", $d) . "<br>";
 
$d=strtotime("next Saturday");
echo date("Y-m-d h:i:sa", $d) . "<br>";
 
$d=strtotime("+3 Months");
echo date("Y-m-d h:i:sa", $d) . "<br>";
?>

Strtotime() isn't perfect, though, so Remember to check the string you put in it.

More date examples

The following example outputs the date of next Saturday:

Example

<?php
$startdate = strtotime("Saturday");
$enddate = strtotime("+6 weeks",$startdate);
 
while ($startdate < $enddate) {
  echo date("M d", $startdate),"<br>";
  $startdate = strtotime("+1 week", $startdate);
}
?>

The following example outputs July Number of days before four days:

Example

<?php
$d1=strtotime("December 31");
$d2=ceil(($d1-time())/60/60/24);
echo "距离十二月三十一日还有：" . $d2 ." 天。";
?>