What steps can be taken to troubleshoot and resolve issues with MySQL functions not working in PHP after modifying the PHP.ini file?

If MySQL functions are not working in PHP after modifying the PHP.ini file, it may be due to the MySQL extension not being enabled. To resolve this issue, you can enable the MySQL extension by uncommenting or adding the following line in the PHP.ini file: extension=mysqli After making this change, restart your web server for the changes to take effect.