Online PHP editor | output for 2O4ER

Output for 8.3.0 - 8.3.6: Warning: array_sum(): Addition is not supported on type array in /in/2O4ER on line 5 float(4.18) Fatal error: Uncaught TypeError: Unsupported operand types: string + array in /in/2O4ER:7 Stack trace: #0 {main} thrown in /in/2O4ER on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18: float(4.18) Fatal error: Uncaught TypeError: Unsupported operand types: string + array in /in/2O4ER:7 Stack trace: #0 {main} thrown in /in/2O4ER on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: float(4.18) Fatal error: Uncaught Error: Unsupported operand types in /in/2O4ER:7 Stack trace: #0 {main} thrown in /in/2O4ER on line 7
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28: float(4.18) Fatal error: Unsupported operand types in /in/2O4ER on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[', expecting ')' in /in/2O4ER on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[', expecting ')' in /in/2O4ER on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/2O4ER on line 5
Process exited with code 255.