& lt？ Server-side programming language (abbreviation of professional hypertext preprocessor)

$ datetime 1 = date _ create(' 20 13- 12-02 ')；

$ datetime 2 = date _ create(' 20 13- 12-25 ')；

$ interval = date _ diff($ datetime 1，$ datetime 2)；

echo $ interval-& gt； Format ("%R%a days");

& gt