What are the potential reasons for PHP extensions like MySQLi/PDO not working after installation?

The potential reasons for PHP extensions like MySQLi/PDO not working after installation could include incorrect configuration settings in the php.ini file, missing dependencies, or the extensions not being enabled. To solve this issue, make sure the necessary extensions are installed, enabled in the php.ini file, and the PHP server is restarted. 

// Example code to enable MySQLi extension in php.ini file

// Locate the php.ini file
// Uncomment or add the following line:
// extension=mysqli
// Save the php.ini file
// Restart the PHP server

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PHP extensions MySQLi PDO installation not working

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