comment obtenir n jours à partir d'aujourd'hui en php

//Simple method how to get the date of tomorrow, yesterday, etc. is to use: 
$tomorrow = date( "Ymd", strtotime( "+1 days" ) ); 
$dayaftertomorrow = date( "Ymd", strtotime( "+2 days" ) ); 
$yesterday = date( "Ymd", strtotime( "-1 days" ) );
Just Make It Global