太阳帆数据 Sunfine Data

The following PHP code includes a simple class that can manipulate dates, such as date subtraction, adding days and subtracting days to the current date. It is very useful because my PHP server does not support the latest DateTime function yet.

<?php

class Dt
{
	private $day;
	private $month;
	private $year;
	private $seconds=86400;

	function __construct()
	  {
		$this->day=date("j");
		$this->month=date("n");
		$this->year=date("Y");
	  }

	function now_diff($by,$bm,$bd)
	   {
		$bm=preg_replace("/[0](.+)/is","\\1",$bm);
		$bd=preg_replace("/[0](.+)/is","\\1",$bd);
		$bt=mktime(0,0,0,$bm,$bd,$by);
		$nt=mktime(0,0,0,$this->month,$this->day,$this->year);
		$df=$nt-$bt;
		$dn=$df/$this->seconds;
		return $dn;
	  }

	function date_diff($by,$bm,$bd,$ty,$tm,$td)
	   {
		$bm=preg_replace("/[0](.+)/is","\\1",$bm);
		$bd=preg_replace("/[0](.+)/is","\\1",$bd);
		$bt=mktime(0,0,0,$bm,$bd,$by);
		$nt=mktime(0,0,0,$tm,$td,$ty);
		$df=$nt-$bt;
		$dn=$df/$this->seconds;
		return $dn;
	  }

	function earlydate($ndays)
	  {
		$nt=mktime(0,0,0,$this->month,$this->day,$this->year);
		$ds=$ndays*$this->seconds;
		return $nt-$ds;
	  }

	function latedate($ndays)
	  {
		$nt=mktime(0,0,0,$this->month,$this->day,$this->year);
		$ds=$ndays*$this->seconds;
		return $nt+$ds;
	  }

}

?>