Online PHP editor | output for Q8caF

Output for 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Undefined constant "FOO" in /in/Q8caF:11 Stack trace: #0 /in/Q8caF(14): [constant expression]() #1 {main} thrown in /in/Q8caF on line 11
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: Fatal error: Uncaught Error: Undefined constant "FOO" in /in/Q8caF:14 Stack trace: #0 {main} thrown in /in/Q8caF on line 14
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Warning: Use of undefined constant FOO - assumed 'FOO' (this will throw an Error in a future version of PHP) in /in/Q8caF on line 14 Notice: Uninitialized string offset: 4 in /in/Q8caF on line 14 string(0) ""
Output for 7.3.32 - 7.3.33: Warning: Use of undefined constant FOO - assumed 'FOO' (this will throw an Error in a future version of PHP) in /in/Q8caF on line 14 string(0) ""
Output for 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25: Notice: Use of undefined constant FOO - assumed 'FOO' in /in/Q8caF on line 14 Notice: Uninitialized string offset: 4 in /in/Q8caF on line 14 string(0) ""
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35: Fatal error: Arrays are not allowed in class constants in /in/Q8caF on line 9
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/Q8caF on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/Q8caF on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Q8caF on line 4
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 T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Q8caF on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/Q8caF on line 4
Process exited with code 255.