PHP: Undefined index even if it exists

Question

It drives me crazy ... I try to parse a csv file and there is a very strange behavior.

Here is the csv

action;id;nom;sites;heures;jours
i;;\"un nom a         


        

Answer 1

I struggled with this issue for a few hours only to realize that the issue was being caused by a null key in the array. Please ensure that none of the keys has a null value.