WordPress logging of errors and amount of queries

// WordPress logging of errors and amount of queries
ini_set('log_errors',TRUE);
ini_set('display_errors', FALSE);
ini_set('error_reporting', E_ALL);
ini_set('error_log', dirname(__FILE__) . '/error-logs/php.log');

if (!file_exists(dirname(__FILE__) . '/error-logs') && is_writable(dirname(__FILE__))) {
    mkdir(dirname(__FILE__) . '/error-logs');
}

if (file_exists(dirname(__FILE__) . '/error-logs') && !file_exists(dirname(__FILE__) . '/error-logs/.htaccess')) {
    file_put_contents(dirname(__FILE__) . '/error-logs/.htaccess', "AuthType Basic\nAuthName \"Restricted Access\"\nAuthUserFile .htnopasswd\nAuthGroupFile /dev/null\nRequire valid-user");
}

define('SAVEQUERIES', true);

function debugShutdown()
{
    global $wpdb;

    error_log('DB Queries: '.count($wpdb->queries));
}

register_shutdown_function('debugShutdown');