Online PHP editor | output for QFIOP

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught TypeError: Unsupported operand types: string * int in /in/QFIOP:4 Stack trace: #0 {main} thrown in /in/QFIOP on line 4
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33: Warning: A non-numeric value encountered in /in/QFIOP on line 4 Warning: A non-numeric value encountered in /in/QFIOP on line 4 Notice: Undefined variable: value in /in/QFIOP on line 7
Output for 7.3.32 - 7.3.33: Warning: A non-numeric value encountered in /in/QFIOP on line 4 Warning: A non-numeric value encountered in /in/QFIOP on line 4
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.23, 7.0.0 - 7.0.20: Notice: Undefined variable: value in /in/QFIOP on line 7
Output for 5.0.0 - 5.0.3: Notice: Undefined variable: value in /in/QFIOP on line 7
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/QFIOP on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/QFIOP on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/QFIOP on line 3
Process exited with code 255.