BUG #16494: cant use row['field name']

The following bug has been logged on the website:

Bug reference:      16494
Logged by:          Preeth TYK
Email address:      preetha@tyk.jp
PostgreSQL version: 12.3
Operating system:   Windows
Description:

I am using pgsql with php. When trying to echo data in tables using
row['field name'] , it is returning error. I am currently using
row['row_number'] which is really inconvenient.