PHP处理日期和时间(php入门者教程)

echo "格式化当前时间
";
echo date('y-m-j');
echo "
";
echo "
";

echo "今天是一年中的第".date('z')."天";
echo "
";
echo "
";

echo date('m 网页特效,y l');
echo "
";
echo "
";

echo "程序执行时间：".date('h:i:s');

echo "时间戳".mktime(0,0,0,12,31,2007)."对应的日期是：";
echo "
";

echo date("m-d-y", mktime(0,0,0,12,31,2007));
echo "

$day = 1;
echo "时间戳".mktime(0,0,0,7,$day+38,2008)."对应的日期是：
";
echo date("y-m-d", mktime(0,0,0,7,$day+38,2008));
echo "

$time = mktime(20,0,0,8,8,2008);

echo "日期：".date("y-m-d h:i:s",$time)."";
echo "
";

echo "

";

echo "该日期相关信息如下：";

echo "
";

$date = getdate($time);

print_r($date);

$day = 1;
$month = 10;
$year = 1949;

$national_unix = mktime(0,0,0,$month,$day,$year);
$now_unix = time();
$national_time = $now_unix - $national_unix;

$national_day_year = floor($national_time/(365*24*60*60));
$national_day_day = floor($national_time/(24*60*60));

echo "www.111com.net 2008已经 ".$national_day_year." 年";
echo "

echo "2008已经 ".$national_day_day." 天"

if(checkdate(9,28,1980))
{
    echo "7,22,1978 : "."这是一个正确的日期格式";
}
else
{
    echo "这不是一个正确的日期格式";
}

echo "
";
echo "

if(checkdate(9,99,1999))
{
    echo "这是一个正确的日期格式";
}
else
{
    echo "9,99,1999 : "."这不是一个正确的日期格式";
}