```php
// All Pantheon Environments.
if (defined('PANTHEON_ENVIRONMENT')) {
  // Turns on WordPress debug settings in development and multidev environments, and disables in test and live.
  if (!in_array(PANTHEON_ENVIRONMENT, array('test', 'live'))) {
    // Debugging enabled.
    if (!defined('WP_DEBUG')) {
      define( 'WP_DEBUG', true );
    }
    if (!defined('WP_DISABLE_FATAL_ERROR_HANDLER')) {
      define( 'WP_DISABLE_FATAL_ERROR_HANDLER', true ); // 5.2 and later
    }
   if (!defined('WP_DEBUG_DISPLAY')) {
      define( 'WP_DEBUG_DISPLAY', true ); // requires WP_DISABLE_FATAL_ERROR_HANDLER set to true
    }
    define( 'WP_DEBUG_LOG', __DIR__ . '/wp-content/uploads/debug.log' ); // Moves the log file to a location writable while in git mode. Only works in WP 5.1
  }
  // WordPress debug settings in Test and Live environments.
  else {
    // Debugging disabled.
    ini_set( 'log_errors','Off');
    ini_set( 'display_errors','Off');
    ini_set( 'error_reporting', E_ALL );
    define( 'WP_DEBUG', false);
    define( 'WP_DEBUG_LOG', false);
    define( 'WP_DISABLE_FATAL_ERROR_HANDLER', false );
    define( 'WP_DEBUG_DISPLAY', false);
  }
}
```