How can a user effectively troubleshoot and adjust opcache settings in PHP?

To effectively troubleshoot and adjust opcache settings in PHP, users can start by checking the current opcache settings using the `opcache_get_configuration()` function. They can then adjust settings such as `opcache.memory_consumption`, `opcache.max_accelerated_files`, and `opcache.revalidate_freq` based on their application's requirements. Finally, users can monitor the opcache statistics using `opcache_get_status()` to ensure the changes have been applied successfully.

// Check current opcache settings
$opcacheConfig = opcache_get_configuration();
var_dump($opcacheConfig);

// Adjust opcache settings
ini_set('opcache.memory_consumption', 128);
ini_set('opcache.max_accelerated_files', 4000);
ini_set('opcache.revalidate_freq', 60);

// Check opcache statistics
$opcacheStatus = opcache_get_status();
var_dump($opcacheStatus);