php output time difference

For personal testing, use strtotime("-1 day") directly;

displays the day before today, which is yesterday. Today is determined based on the current Unix time cutoff.

date_default_timezone_set('PRC'); //Default time zone
echo "Today:",date("Y-m-d",time()),"
";
echo "Today:", date("Y-m-d",strtotime("18 june 2008")),"
";
echo "Yesterday:",date("Y-m-d",strtotime("-1 day")), "echo "Tomorrow:",date("Y-m-d",strtotime("+1 day")), "
";
echo "One week later:",date("Y-m-d",strtotime(" +1 week")), "
";
echo "One week, two days, four hours and two seconds later:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "
";
echo "Next Thursday:",date("Y-m-d",strtotime("next Thursday")), "
";
echo "Last Monday:".date("Y-m-d",strtotime("last Monday"))."
";
echo "One month ago:".date("Y-m-d",strtotime("last month"))."
";
echo "One month later:" ".date("Y-m-d",strtotime("+1 month"))."
";
echo "Ten years later:".date("Y-m-d",strtotime("+10 year")). "
";
?>

//The time before or after the interval in minutes
function GetMinute($Minu,$type='l')
{
if(!strcmp($type,' b'))
$res=date("Y-m-d H:i:s",strtotime("-$Minu minute"));

else $res=0;
if(!strcmp($type,'l' ))
$res=date("Y-m-d H:i:s",strtotime("+$Minu minute"));

else $res=0;
return $res;
}
//How many seconds ago Or the time after
function GetSec($sec,$type='l')
{
if(!strcmp($type,'b'))
$res=date("Y-m-d H:i:s",strtotime ("-$sec second"));

else $res=0;
if(!strcmp($type,'l'))
$res=date("Y-m-d H:i:s",strtotime(" +$sec second"));

else $res=0;
return $res;
}

The above introduces the PHP output time difference, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.