Problem: PHP Array Addition

Code: PHP+Array+Addition/tails_1732599020

Nibbles version: 0.2 | 0.21 | 0.22 | 0.23 | 0.24 | 0.25 | 1.00

Format: Compact | Simple | +Type | Table | JSON | .nbl (DeBruijn) | .nbl (names)

% @ 
  " +" 
: << @ 
  > [ , @ 
      - , $ 
        ~