Message: Trying to access array offset on value of type null [duplicate]
This happens because $cOTLdata is not null but the index ‘char_data’ does not exist. Previous versions of PHP may have been less strict on such mistakes and silently swallowed the error / notice while 7.4 does not do this anymore. To check whether the index exists or not you can use isset(): Which means the line should look something like … Read more