PHP date calculation operation processing, the current date plus one day and the specified date minus one day

1. Add one day to the current time ？



<?php

echo " today :",date('Y-m-d H:i:s'),"<br>";

echo " Tomorrow, :",date('Y-m-d H:i:s',strtotime('+1 day'));

?>

 The previous line outputs the current time , The next line outputs tomorrow's time 



 Similarly, add one year , An hour , A minute  , January ...



echo " Tomorrow, :",date('Y-m-d H:i:s',strtotime('+1 day'));



echo " Tomorrow, :",date('Y-m-d H:i:s',strtotime('+1 hour'));



echo " Tomorrow, :",date('Y-m-d H:i:s',strtotime('+1 minute'));



echo " Tomorrow, :",date('Y-m-d H:i:s',strtotime('+1 mouth'));



 here +1 day Parameters can be modified 1 For any number you want   day It can also be changed to year（ year ）,month（ month ）,hour（ Hours ）minute（ branch ）,second（ second ） Such as ：

date('Y-m-d H:i:s',strtotime("+1 day +1 hour +1 minute");

 You can combine freely , To achieve the purpose of arbitrary output time 

 notes ： This method is only applicable to 1970 Applicable after , That is, the applicable scope of timestamp .



2. Add one day to the specified time ？ An hour ？......



 echo   date("Y-m-d",strtotime("+1 month",strtotime("2012-02-04")));



 The result is ：2011-03-04



echo   date("Y-m-d",strtotime("+1 week",strtotime("2011-02-04")));



 The result is ：2011-02-11



echo   date("Y-m-d",strtotime("+1 day",strtotime("2011-02-04")));



 The result is ：2011-02-05



 The same is true for others .



 notes ： This method is only applicable to 1970 Applicable after , That is, the applicable scope of timestamp .



 Then subtract one or several days ？

 Same method , Just change the plus sign into a minus sign .

<?php

echo " today :",date('Y-m-d H:i:s'),"<br>";

echo " yesterday :",date('Y-m-d H:i:s',strtotime('-1 day'));

?>