php date strtotime add days
// add 1 day to the date above $n = date('Y-m-d', strtotime( $d . " +1 days")); // add 1 month to the date above $n = date('Y-m-d', strtotime( $d . " +1 month")); // add 1 year to the date above $n = date('Y-m-d', strtotime( $d . " +1 year")); // subtract 1 day to the date above $n = date('Y-m-d', strtotime( $d . " -1 days")); // subtract 1 month to the date above $n = date('Y-m-d', strtotime( $d . " -1 month")); // subtract 1 year to the date above $n = date('Y-m-d', strtotime( $d . " -1 year"));