PHP date函数简述及获取制定时间的方法

echo "今天:".date("Y-m-d")."<br>";     
echo "昨天:".date("Y-m-d",strtotime("-1 day")), "<br>";     
echo "明天:".date("Y-m-d",strtotime("+1 day")). "<br>";
echo "一周后:".date("Y-m-d",strtotime("+1 week")). "<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 "十年后:".date("Y-m-d",strtotime("+10 year"))."<br>";    
strtotime()函数的作用是将日期时间描述解析为 Unix 时间戳
int strtotime ( string time [, int now] )

date("l");
//data就可以获取英文的星期比如Sunday
date("w");
//这个可以获取数字星期比如123，注意0是星期日

$weekarray=array("日","一","二","三","四","五","六");
echo "星期".$weekarray[date("w")];

$weekarray=array("日","一","二","三","四","五","六");
echo "星期".$weekarray[date("w","2011-11-11")];