PHP获取时间相关函数和使用总结

<?php

	date_default_timezone_set('PRC'); 	//设置默认时区

	echo "当前时间戳：",time()."<br>";

	echo "时间戳转格式时间：".date("Y-m-d H:i:s",time())."<br>";

	echo "格式时间转时间戳：",strtotime("2018-5-28 6:01:12")."<br/>";

	echo "今天:".date("Y-m-d",strtotime("2018-5-28"))."<br>";

	echo "昨天:".date("Y-m-d",strtotime("-1 day"))."<br>";

	echo "明天:".date("Y-m-d",strtotime("+1 day"))."<br>";

	echo "一周前:".date("Y-m-d",strtotime("-1 week"))."<br>";
	
	echo "一周后:".date("Y-m-d",strtotime("+1 week"))."<br>";

	echo "一周零两天四小时两秒前:".date("Y-m-d G:H:s",strtotime("-1 week -2 days -4 hours -3 seconds"))."<br>";
	
	echo "一周零两天四小时两秒后:".date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds"))."<br>";
	
	echo "下个星期四:".date("Y-m-d",strtotime("next Thursday"))."<br>";
	
	echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."<br>";
	
	echo "一个月前:".date("Y-m-d",strtotime("last month"))."<br>";
	
	echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."<br>";

	echo "一年前:".date("Y-m-d",strtotime("-1 year"))."<br>";
	
	echo "一年后:".date("Y-m-d",strtotime("+1 year"))."<br>";