From numeric string to int array in PHP

Question

I've to extrapolate from a numeric string a date composed by month and year only. E.g: A string like this:

201611

has to become:

2016-11

Then, I've to store this date in a fild of db that is a datetime. Can you help me, please? Thanks!

Answer 1

$new_date = substr_replace($old_date, '-', 4, 0);