serving the default cache when they are present
 *
 * @since 3.4
 * @author Remy Perona
 *
 * @return array
 */
function rocket_get_ignored_parameters() {
	$params = [
		'utm_source'      => 1,
		'utm_medium'      => 1,
		'utm_campaign'    => 1,
		'utm_expid'       => 1,
		'utm_term'        => 1,
		'utm_content'     => 1,
		'fb_action_ids'   => 1,
		'fb_action_types' => 1,
		'fb_source'       => 1,
		'fbclid'          => 1,
		'gclid'           => 1,
		'age-verified'    => 1,
		'ao_noptimize'    => 1,
		'usqp'            => 1,
		'cn-reloaded'     => 1,
		'_ga'             => 1,
	];

	/**
	 * Filters the ignored parameters
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param array $params An array of ignored parameters as array keys.
	 */
	return apply_filters( 'rocket_cache_ignored_parameters', $params );
}

/**
 * Get all uri we don't cache.
 *
 * @since 3.3.2 Exclude embedded URLs
 * @since 2.6   Using json_get_url_prefix() to auto-exclude the WordPress REST API.
 * @since 2.4.1 Auto-exclude WordPress REST API.
 * @since 2.0
 *
 * @return string A pipe separated list of rejected uri.
 */
function get_rocket_cache_reject_uri() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	static $uris;

	if ( $uris ) {
		return $uris;
	}

	$uris      = get_rocket_option( 'cache_reject_uri', [] );
	$uris      = is_array( $uris ) ? $uris : [];
	$home_root = rocket_get_home_dirname();

	if ( '' !== $home_root && $uris ) {
		// The site is not at the domain root, it's in a folder.
		$home_root_escaped = preg_quote( $home_root, '/' );
		$home_root_len     = strlen( $home_root );

		foreach ( $uris as $i => $uri ) {
			/**
			 * Since these URIs can be regex patterns like `/homeroot(/.+)/`, we can't simply search for the string `/homeroot/` (nor `/homeroot`).
			 * So this pattern searchs for `/homeroot/` and `/homeroot(/`.
			 */
			if ( ! preg_match( '/' . $home_root_escaped . '\(?\//', $uri ) ) {
				// Reject URIs located outside site's folder.
				unset( $uris[ $i ] );
				continue;
			}

			// Remove the home directory.
			$uris[ $i ] = substr( $uri, $home_root_len );
		}
	}

	// Exclude feeds.
	$uris[] = '/(.+/)?' . $GLOBALS['wp_rewrite']->feed_base . '/?';

	// Exlude embedded URLs.
	$uris[] = '/(?:.+/)?embed/';

	/**
	 * Filter the rejected uri
	 *
	 * @since 2.1
	 *
	 * @param array $uris List of rejected uri
	*/
	$uris = apply_filters( 'rocket_cache_reject_uri', $uris );
	$uris = array_filter( $uris );

	if ( ! $uris ) {
		return '';
	}

	if ( '' !== $home_root ) {
		foreach ( $uris as $i => $uri ) {
			if ( preg_match( '/' . $home_root_escaped . '\(?\//', $uri ) ) {
				// Remove the home directory from the new URIs.
				$uris[ $i ] = substr( $uri, $home_root_len );
			}
		}
	}

	$uris = implode( '|', $uris );

	if ( '' !== $home_root ) {
		// Add the home directory back.
		$uris = $home_root . '(' . $uris . ')';
	}

	return $uris;
}

/**
 * Get all cookie names we don't cache.
 *
 * @since 2.0
 *
 * @return string A pipe separated list of rejected cookies.
 */
function get_rocket_cache_reject_cookies() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$logged_in_cookie = explode( COOKIEHASH, LOGGED_IN_COOKIE );
	$logged_in_cookie = array_map( 'preg_quote', $logged_in_cookie );
	$logged_in_cookie = implode( '.+', $logged_in_cookie );

	$cookies   = get_rocket_option( 'cache_reject_cookies', [] );
	$cookies[] = $logged_in_cookie;
	$cookies[] = 'wp-postpass_';
	$cookies[] = 'wptouch_switch_toggle';
	$cookies[] = 'comment_author_';
	$cookies[] = 'comment_author_email_';

	/**
	 * Filter the rejected cookies.
	 *
	 * @since 2.1
	 *
	 * @param array $cookies List of rejected cookies.
	*/
	$cookies = (array) apply_filters( 'rocket_cache_reject_cookies', $cookies );
	$cookies = array_filter( $cookies );
	$cookies = array_flip( array_flip( $cookies ) );

	return implode( '|', $cookies );
}

/**
 * Get list of mandatory cookies to be able to cache pages.
 *
 * @since 2.7
 *
 * @return string A pipe separated list of mandatory cookies.
 */
function get_rocket_cache_mandatory_cookies() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$cookies = [];

	/**
	 * Filter list of mandatory cookies.
	 *
	 * @since 2.7
	 *
	 * @param array $cookies List of mandatory cookies.
	 */
	$cookies = (array) apply_filters( 'rocket_cache_mandatory_cookies', $cookies );
	$cookies = array_filter( $cookies );
	$cookies = array_flip( array_flip( $cookies ) );

	return implode( '|', $cookies );
}

/**
 * Get list of dynamic cookies.
 *
 * @since 2.7
 *
 * @return array List of dynamic cookies.
 */
function get_rocket_cache_dynamic_cookies() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$cookies = [];

	/**
	 * Filter list of dynamic cookies.
	 *
	 * @since 2.7
	 *
	 * @param array $cookies List of dynamic cookies.
	 */
	$cookies = (array) apply_filters( 'rocket_cache_dynamic_cookies', $cookies );
	$cookies = array_filter( $cookies );
	$cookies = array_unique( $cookies );

	return $cookies;
}

/**
 * Get all User-Agent we don't allow to get cache files.
 *
 * @since 2.3.5
 *
 * @return string A pipe separated list of rejected User-Agent.
 */
function get_rocket_cache_reject_ua() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$ua   = get_rocket_option( 'cache_reject_ua', [] );
	$ua[] = 'facebookexternalhit';

	/**
	 * Filter the rejected User-Agent
	 *
	 * @since 2.3.5
	 *
	 * @param array $ua List of rejected User-Agent.
	*/
	$ua = (array) apply_filters( 'rocket_cache_reject_ua', $ua );
	$ua = array_filter( $ua );
	$ua = array_flip( array_flip( $ua ) );
	$ua = implode( '|', $ua );

	return str_replace( [ ' ', '\\\\ ' ], '\\ ', $ua );
}

/**
 * Get all query strings which can be cached.
 *
 * @since 2.3
 *
 * @return array List of query strings which can be cached.
 */
function get_rocket_cache_query_string() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$query_strings = get_rocket_option( 'cache_query_strings', [] );

	/**
	 * Filter query strings which can be cached.
	 *
	 * @since 2.3
	 *
	 * @param array $query_strings List of query strings which can be cached.
	*/
	$query_strings = (array) apply_filters( 'rocket_cache_query_strings', $query_strings );
	$query_strings = array_filter( $query_strings );
	$query_strings = array_flip( array_flip( $query_strings ) );

	return $query_strings;
}

/**
 * Get list of JS files to be excluded from defer JS.
 *
 * @since 2.10
 * @author Remy Perona
 *
 * @return array An array of URLs for the JS files to be excluded.
 */
function get_rocket_exclude_defer_js() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	$exclude_defer_js = [
		'gist.github.com',
		'content.jwplatform.com',
		'js.hsforms.net',
		'www.uplaunch.com',
		'google.com/recaptcha',
		'widget.reviews.co.uk',
		'verify.authorize.net/anetseal',
		'lib/admin/assets/lib/webfont/webfont.min.js',
		'app.mailerlite.com',
	];

	if ( get_rocket_option( 'defer_all_js', 0 ) && get_rocket_option( 'defer_all_js_safe', 0 ) ) {
		$jquery            = site_url( wp_scripts()->registered['jquery-core']->src );
		$jetpack_jquery    = 'c0.wp.com/c/(?:.+)/wp-includes/js/jquery/jquery.js';
		$googleapis_jquery = 'ajax.googleapis.com/ajax/libs/jquery/(?:.+)/jquery(?:\.min)?.js';
		$cdnjs_jquery      = 'cdnjs.cloudflare.com/ajax/libs/jquery/(?:.+)/jquery(?:\.min)?.js';

		$exclude_defer_js[] = rocket_clean_exclude_file( $jquery );
		$exclude_defer_js[] = $jetpack_jquery;
		$exclude_defer_js[] = $googleapis_jquery;
		$exclude_defer_js[] = $cdnjs_jquery;
	}

	/**
	 * Filter list of Deferred JavaScript files
	 *
	 * @since 2.10
	 * @author Remy Perona
	 *
	 * @param array $exclude_defer_js An array of URLs for the JS files to be excluded.
	 */
	$exclude_defer_js = apply_filters( 'rocket_exclude_defer_js', $exclude_defer_js );

	foreach ( $exclude_defer_js as $i => $exclude ) {
		$exclude_defer_js[ $i ] = str_replace( '#', '\#', $exclude );
	}

	return $exclude_defer_js;
}

/**
 * Get list of CSS files to be excluded from async CSS.
 *
 * @since 2.10
 * @author Remy Perona
 *
 * @return array An array of URLs for the CSS files to be excluded.
 */
function get_rocket_exclude_async_css() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
	/**
	 * Filter list of async CSS files
	 *
	 * @since 2.10
	 * @author Remy Perona
	 *
	 * @param array $exclude_async_css An array of URLs for the CSS files to be excluded.
	 */
	$exclude_async_css = (array) apply_filters( 'rocket_exclude_async_css', [] );
	$exclude_async_css = array_filter( $exclude_async_css );
	$exclude_async_css = array_flip( array_flip( $exclude_async_css ) );

	return $exclude_async_css;
}

/**
 * Determine if the key is valid
 *
 * @since 2.9 use hash_equals() to compare the hash values
 * @since 1.0
 *
 * @return bool true if everything is ok, false otherwise
 */
function rocket_valid_key() {
	return true;
}

/**
 * Determine if the key is valid.
 *
 * @since 2.9.7 Remove arguments ($type & $data).
 * @since 2.9.7 Stop to auto-check the validation each 1 & 30 days.
 * @since 2.2 The function do the live check and update the option.
 *
 * @return bool|array
 */
function rocket_check_key() {
	// Recheck the license.
	$return = rocket_valid_key();

	Logger::info( 'LICENSE VALIDATION PROCESS STARTED.', [ 'license validation process' ] );

	$response = wp_remote_get(
		rocket_get_constant( 'WP_ROCKET_WEB_VALID' ),
		[
			'timeout' => 30,
		]
	);

	if ( is_wp_error( $response ) ) {
		Logger::error(
			'License validation failed.',
			[
				'license validation process',
				'request_error' => $response->get_error_messages(),
			]
		);

		set_transient( 'rocket_check_key_errors', $response->get_error_messages() );

		return $return;
	}

	$body = wp_remote_retrieve_body( $response );
	$json = json_decode( $body );

	if ( null === $json ) {
		if ( '' === $body ) {
			Logger::error( 'License validation failed. No body available in response.', [ 'license validation process' ] );
			// Translators: %1$s = opening em tag, %2$s = closing em tag, %3$s = opening link tag, %4$s closing link tag.
			$message = __( 'License validation failed. Our server could not resolve the request from your website.', 'rocket' ) . '<br>' . sprintf( __( 'Try clicking %1$sSave Changes%2$s below. If the error persists, follow %3$sthis guide%4$s.', 'rocket' ), '<em>', '</em>', '<a href="https://docs.wp-rocket.me/article/100-resolving-problems-with-license-validation#general">', '</a>' );
			set_transient( 'rocket_check_key_errors', [ $message ] );

			return $return;
		}

		Logger::error(
			'License validation failed.',
			[
				'license validation process',
				'response_body' => $body,
			]
		);

		if ( 'NULLED' === $body ) {
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			$message = __( 'License validation failed. You may be using a nulled version of the plugin. Please do the following:', 'rocket' ) . '<ul><li>' . sprintf( __( 'Login to your WP Rocket %1$saccount%2$s', 'rocket' ), '<a href="https://wp-rocket.me/account/" rel="noopener noreferrer" target=_"blank">', '</a>' ) . '</li><li>' . __( 'Download the zip file', 'rocket' ) . '<li></li>' . __( 'Reinstall', 'rocket' ) . '</li></ul>' . sprintf( __( 'If you do not have a WP Rocket account, please %1$spurchase a license%2$s.', 'rocket' ), '<a href="https://wp-rocket.me/" rel="noopener noreferrer" target="_blank">', '</a>' );
			set_transient( 'rocket_check_key_errors', [ $message ] );

			return $return;
		}

		if ( 'BAD_USER' === $body ) {
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			$message = __( 'License validation failed. This user account does not exist in our database.', 'rocket' ) . '<br>' . sprintf( __( 'To resolve, please contact support.', 'rocket' ), '<a href="https://wp-rocket.me/support/" rel="noopener noreferrer" target=_"blank">', '</a>' );
			set_transient( 'rocket_check_key_errors', [ $message ] );

			return $return;
		}

		if ( 'USER_BLACKLISTED' === $body ) {
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			$message = __( 'License validation failed. This user account is blacklisted.', 'rocket' ) . '<br>' . sprintf( __( 'Please see %1$sthis guide%2$s for more info.', 'rocket' ), '<a href="https://docs.wp-rocket.me/article/100-resolving-problems-with-license-validation#errors" rel="noopener noreferrer" target=_"blank">', '</a>' );
			set_transient( 'rocket_check_key_errors', [ $message ] );

			return $return;
		}

		// Translators: %1$s = opening em tag, %2$s = closing em tag, %3$s = opening link tag, %4$s closing link tag.
		$message = __( 'License validation failed. Our server could not resolve the request from your website.', 'rocket' ) . '<br>' . sprintf( __( 'Try clicking %1$sSave Changes%2$s below. If the error persists, follow %3$sthis guide%4$s.', 'rocket' ), '<em>', '</em>', '<a href="https://docs.wp-rocket.me/article/100-resolving-problems-with-license-validation#general" rel="noopener noreferrer" target=_"blank">', '</a>' );
		set_transient( 'rocket_check_key_errors', [ $message ] );

		return $return;
	}

	$rocket_options                   = [];
	$rocket_options['consumer_key']   = $json->data->consumer_key;
	$rocket_options['consumer_email'] = $json->data->consumer_email;

	if ( ! $json->success ) {
		$messages = [
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			'BAD_LICENSE' => __( 'Your license is not valid.', 'rocket' ) . '<br>' . sprintf( __( 'Make sure you have an active %1$sWP Rocket license%2$s.', 'rocket' ), '<a href="https://wp-rocket.me/" rel="noopener noreferrer" target="_blank">', '</a>' ),
			// Translators: %1$s = opening link tag, %2$s = closing link tag, %3$s = opening link tag.
			'BAD_NUMBER'  => __( 'You have added as many sites as your current license allows.', 'rocket' ) . '<br>' . sprintf( __( 'Upgrade your %1$saccount%2$s or %3$stransfer your license%2$s to this domain.', 'rocket' ), '<a href="https://wp-rocket.me/account/" rel="noopener noreferrer" target=_"blank">', '</a>', '<a href="https://docs.wp-rocket.me/article/28-transfering-your-license-to-another-site" rel="noopener noreferrer" target=_"blank">' ),
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			'BAD_SITE'    => __( 'This website is not allowed.', 'rocket' ) . '<br>' . sprintf( __( 'Please %1$scontact support%2$s.', 'rocket' ), '<a href="https://wp-rocket.me/support/" rel="noopener noreferrer" target=_"blank">', '</a>' ),
			// Translators: %1$s = opening link tag, %2$s = closing link tag.
			'BAD_KEY'     => __( 'This license key is not recognized.', 'rocket' ) . '<ul><li>' . sprintf( __( 'Login to your WP Rocket %1$saccount%2$s', 'rocket' ), '<a href="https://wp-rocket.me/account/" rel="noopener noreferrer" target=_"blank">', '</a>' ) . '</li><li>' . __( 'Download the zip file', 'rocket' ) . '<li></li>' . __( 'Reinstall', 'rocket' ) . '</li></ul>' . sprintf( __( 'If the issue persists, please %1$scontact support%2$s.', 'rocket' ), '<a href="https://wp-rocket.me/support/" rel="noopener noreferrer" target=_"blank">', '</a>' ),
		];

		$rocket_options['secret_key'] = '';

		// Translators: %s = error message returned.
		set_transient( 'rocket_check_key_errors', [ sprintf( __( 'License validation failed: %s', 'rocket' ), $messages[ $json->data->reason ] ) ] );

		Logger::error(
			'License validation failed.',
			[
				'license validation process',
				'response_error' => $json->data->reason,
			]
		);

		set_transient( rocket_get_constant( 'WP_ROCKET_SLUG' ), $rocket_options );
		return $rocket_options;
	}

	$rocket_options['secret_key'] = $json->data->secret_key;

	if ( ! get_rocket_option( 'license' ) ) {
		$rocket_options['license'] = '1';
	}

	Logger::info( 'License validation successful.', [ 'license validation process' ] );

	set_transient( rocket_get_constant( 'WP_ROCKET_SLUG' ), $rocket_options );
	delete_transient( 'rocket_check_key_errors' );
	rocket_delete_licence_data_file();

	return $rocket_options;
}

/**
 * Deletes the licence-data.php file if it exists
 *
 * @since 3.5
 * @author Remy Perona
 *
 * @return void
 */
function rocket_delete_licence_data_file() {
	if ( is_multisite() ) {
		return;
	}

	$rocket_path = rocket_get_constant( 'WP_ROCKET_PATH' );

	if ( ! rocket_direct_filesystem()->exists( $rocket_path . 'licence-data.php' ) ) {
		return;
	}

	rocket_direct_filesystem()->delete( $rocket_path . 'licence-data.php' );
}

/**
 * Is WP a MultiSite and a subfolder install?
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return bool
 */
function rocket_is_subfolder_install() {
	global $wpdb;
	static $subfolder_install;

	if ( isset( $subfolder_install ) ) {
		return $subfolder_install;
	}

	if ( is_multisite() ) {
		$subfolder_install = ! is_subdomain_install();
	} elseif ( ! is_null( $wpdb->sitemeta ) ) {
		$subfolder_install = ! $wpdb->get_var( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = 1 AND meta_key = 'subdomain_install'" );  // phpcs:ignore WordPress.DB.DirectDatabaseQuery
	} else {
		$subfolder_install = false;
	}

	return $subfolder_install;
}

/**
 * Get the name of the "home directory", in case the home URL is not at the domain's root.
 * It can be seen like the `RewriteBase` from the .htaccess file, but without the trailing slash.
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return string
 */
function rocket_get_home_dirname() {
	static $home_root;

	if ( isset( $home_root ) ) {
		return $home_root;
	}

	$home_root = wp_parse_url( rocket_get_main_home_url() );

	if ( ! empty( $home_root['path'] ) ) {
		$home_root = '/' . trim( $home_root['path'], '/' );
		$home_root = rtrim( $home_root, '/' );
	} else {
		$home_root = '';
	}

	return $home_root;
}

/**
 * Get the URL of the site's root. It corresponds to the main site's home page URL.
 *
 * @since  3.1.1
 * @author Grégory Viguier
 *
 * @return string
 */
function rocket_get_main_home_url() {
	static $root_url;

	if ( isset( $root_url ) ) {
		return $root_url;
	}

	if ( ! is_multisite() || is_main_site() ) {
		$root_url = rocket_get_home_url( '/' );
		return $root_url;
	}

	$current_network = get_network();

	if ( $current_network ) {
		$root_url = set_url_scheme( 'https://' . $current_network->domain . $current_network->path );
		$root_url = trailingslashit( $root_url );
	} else {
		$root_url = rocket_get_home_url( '/' );
	}

	return $root_url;
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function rocket_valid_key() in /home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/class-plugin.php:103
Stack trace:
#0 /home/payon/public_html/wp-content/plugins/wp-rocket/inc/main.php(40): WP_Rocket\Plugin-&gt;load()
#1 /home/payon/public_html/wp-includes/class-wp-hook.php(308): rocket_init('')
#2 /home/payon/public_html/wp-includes/class-wp-hook.php(332): WP_Hook-&gt;apply_filters(NULL, Array)
#3 /home/payon/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action(Array)
#4 /home/payon/public_html/wp-settings.php(486): do_action('plugins_loaded')
#5 /home/payon/public_html/wp-config.php(92): require_once('/home/payon/pub...')
#6 /home/payon/public_html/wp-load.php(50): require_once('/home/payon/pub...')
#7 /home/payon/public_html/wp-blog-header.php(13): require_once('/home/payon/pub...')
#8 /home/payon/public_html/index.php(17): require('/home/payon/pub...')
#9 {main}
  thrown in <b>/home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/class-plugin.php</b> on line <b>103</b><br />