Online PHP editor | output for HNOvI

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 Error: Undefined constant "SOME_PDO_CONNECTION" in /in/HNOvI:5 Stack trace: #0 {main} thrown in /in/HNOvI on line 5
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Warning: Use of undefined constant SOME_PDO_CONNECTION - assumed 'SOME_PDO_CONNECTION' (this will throw an Error in a future version of PHP) in /in/HNOvI on line 5 Array ( [0] => name [1] => email [2] => phone [3] => city )
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33: Notice: Use of undefined constant SOME_PDO_CONNECTION - assumed 'SOME_PDO_CONNECTION' in /in/HNOvI on line 5 Array ( [0] => name [1] => email [2] => phone [3] => city )
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38: Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/HNOvI on line 2
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 '.', expecting '&' or T_VARIABLE in /in/HNOvI on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '.', expecting '&' or T_VARIABLE in /in/HNOvI on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected '.', expecting '&' or T_VARIABLE or T_CONST in /in/HNOvI on line 2
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 '&' or T_VARIABLE or T_CONST in /in/HNOvI on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `'&'' or `T_VARIABLE' or `T_CONST' in /in/HNOvI on line 2
Process exited with code 255.