What steps can be taken to troubleshoot and resolve errors related to missing PHP extensions?

When encountering errors related to missing PHP extensions, the first step is to identify which extension is missing. Once identified, the missing extension can be installed using a package manager like apt-get or yum, or by compiling the extension from source. After installing the extension, it may be necessary to restart the web server to apply the changes.

<?php
// Check if a specific PHP extension is loaded
if (!extension_loaded('mysqli')) {
    // Attempt to load the mysqli extension
    if (!dl('mysqli.so')) {
        die('Unable to load mysqli extension.');
    }
}
// Continue with your PHP code that requires the mysqli extension
?>