PHP date_time_set() 函数

date_time_set(object,hours, minutes,seconds, $microseconds)

<?php
   //Creating a date
   date = new DateTime();
   //Setting the date
   date_time_set(date, 7, 20, 35);   
   print("Date: ".date_format($date, "Y/m/d H:i:s"));
?>

Date: 2020/05/10 07:20:35

<?php
   //Date string
   date_string = "25-09-1989 10:42:12";
   //Creating a DateTime objectdate_time_Obj = date_create(date_string);
   print("Original Date: ".date_format(date_time_Obj, "Y/m/d H:i:s"));
   print("\n");
   //Setting the date
   date = date_time_set(date_time_Obj, 6, 36, 3 );   
   print("Modified Date: ".date_format($date, "Y/m/d H:i:s"));
?>

Original Date: 1989/09/25 10:42:12
Modified Date: 1989/09/25 06:36:03

<?php
   //Creating a date
   date = new DateTime();
   //Setting the date
   date_time_set(date, 24, 15, 36);   
   print("Date: ".date_format($date, "Y/m/d H:i:s"));
?>

Date: 2020/05/11 00:15:36

$dateSrc = '2007-04-19 12:50 GMT';
$dateTime = date_create( $dateSrc);;
$retval = date_time_set( $dateTime, 20, 40, 10);

echo 'DateTime::format(): '.$dateTime->format('Y:M:D:H:i:s');
echo "\n";

# Using second function.
$dateTime = new DateTime($dateSrc);
$retval = $dateTime->setTime(20, 56,6);

echo 'DateTime::format(): '.$dateTime->format('Y:M:D:H:i:s');

DateTime::format(): 2007:Apr:Thu:20:40:10
DateTime::format(): 2007:Apr:Thu:20:56:06