Online PHP editor | output for 50Eg4

Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught PDOException: PDO::__construct(): Argument #1 ($dsn) must be a valid data source name in /in/50Eg4:4 Stack trace: #0 /in/50Eg4(4): PDO->__construct('', '', Object(SensitiveParameterValue), Array) #1 {main} thrown in /in/50Eg4 on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28: Fatal error: Uncaught PDOException: PDO::__construct(): Argument #1 ($dsn) must be a valid data source name in /in/50Eg4:4 Stack trace: #0 /in/50Eg4(4): PDO->__construct('', '', '', Array) #1 {main} thrown in /in/50Eg4 on line 4
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: Fatal error: Uncaught PDOException: invalid data source name in /in/50Eg4:4 Stack trace: #0 /in/50Eg4(4): PDO->__construct('', '', '', Array) #1 {main} thrown in /in/50Eg4 on line 4
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Uncaught exception 'PDOException' with message 'invalid data source name' in /in/50Eg4:4 Stack trace: #0 /in/50Eg4(4): PDO->__construct('', '', '', Array) #1 {main} thrown in /in/50Eg4 on line 4
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 '[' in /in/50Eg4 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, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/50Eg4 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/50Eg4 on line 4
Process exited with code 255.