Online PHP editor | output for Nn4mH

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /in/Nn4mH:2 Stack trace: #0 {main} thrown in /in/Nn4mH on line 2
Process exited with code 255.
Output for 5.0.0 - 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Call to undefined function mysql_connect() in /in/Nn4mH on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9: Warning: mysql_connect(): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in /in/Nn4mH on line 2 Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in /in/Nn4mH on line 4
Output for 4.3.0 - 4.3.1: Warning: mysql_connect() [http://www.php.net/function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in /in/Nn4mH on line 2 Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in /in/Nn4mH on line 4