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class-wpseo-option-ms.php	9.35 MB	View DL Edit
class-wpseo-option-social.php	9.68 MB	View DL Edit
class-wpseo-option-titles.php	34.91 MB	View DL Edit
class-wpseo-option-wpseo.php	21.65 MB	View DL Edit
class-wpseo-option.php	29.53 MB	View DL Edit
class-wpseo-options.php	16.09 MB	View DL Edit
class-wpseo-taxonomy-meta.php	17.3 MB	View DL Edit

Edit file: /home/mhhtmff/www/site/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-option.php

<?php
/**
 * WPSEO plugin file.
 *
 * @package WPSEO\Internals\Options
 */

/**
 * This abstract class and its concrete classes implement defaults and value validation for
 * all WPSEO options and subkeys within options.
 *
 * Some guidelines:
 * [Retrieving options]
 * - Use the normal get_option() to retrieve an option. You will receive a complete array for the option.
 *   Any subkeys which were not set, will have their default values in place.
 * - In other words, you will normally not have to check whether a subkey isset() as they will *always* be set.
 *   They will also *always* be of the correct variable type.
 *   The only exception to this are the options with variable option names based on post_type or taxonomy
 *   as those will not always be available before the taxonomy/post_type is registered.
 *   (they will be available if a value was set, they won't be if it wasn't as the class won't know
 *   that a default needs to be injected).
 *
 * [Updating/Adding options]
 * - For multisite site_options, please use the WPSEO_Options::update_site_option() method.
 * - For normal options, use the normal add/update_option() functions. As long as the classes here
 *   are instantiated, validation for all options and their subkeys will be automatic.
 * - On (successful) update of a couple of options, certain related actions will be run automatically.
 *   Some examples:
 *   - on change of wpseo[yoast_tracking], the cron schedule will be adjusted accordingly
 *   - on change of wpseo and wpseo_title, some caches will be cleared
 *
 * [Important information about add/updating/changing these classes]
 * - Make sure that option array key names are unique across options. The WPSEO_Options::get_all()
 *   method merges most options together. If any of them have non-unique names, even if they
 *   are in a different option, they *will* overwrite each other.
 * - When you add a new array key in an option: make sure you add proper defaults and add the key
 *   to the validation routine in the proper place or add a new validation case.
 *   You don't need to do any upgrading as any option returned will always be merged with the
 *   defaults, so new options will automatically be available.
 *   If the default value is a string which need translating, add this to the concrete class
 *   translate_defaults() method.
 * - When you remove an array key from an option: if it's important that the option is really removed,
 *   add the WPSEO_Option::clean_up( $option_name ) method to the upgrade run.
 *   This will re-save the option and automatically remove the array key no longer in existence.
 * - When you rename a sub-option: add it to the clean_option() routine and run that in the upgrade run.
 * - When you change the default for an option sub-key, make sure you verify that the validation routine will
 *   still work the way it should.
 *   Example: changing a default from '' (empty string) to 'text' with a validation routine with tests
 *   for an empty string will prevent a user from saving an empty string as the real value. So the
 *   test for '' with the validation routine would have to be removed in that case.
 * - If an option needs specific actions different from defined in this abstract class, you can just overrule
 *   a method by defining it in the concrete class.
 *
 * @todo [JRF => testers] Double check that validation will not cause errors when called
 *       from upgrade routine (some of the WP functions may not yet be available).
 */
abstract class WPSEO_Option {

/**
	 * Prefix for override option keys that allow or disallow the option key of the same name.
	 *
	 * @var string
	 */
	const ALLOW_KEY_PREFIX = 'allow_';

/**
	 * Option name - MUST be set in concrete class and set to public.
	 *
	 * @var string
	 */
	protected $option_name;

/**
	 * Option group name for use in settings forms.
	 *
	 * Will be set automagically if not set in concrete class (i.e.
	 * if it conforms to the normal pattern 'yoast' . $option_name . 'options',
	 * only set in concrete class if it doesn't).
	 *
	 * @var string
	 */
	public $group_name;

/**
	 * Whether to include the option in the return for WPSEO_Options::get_all().
	 *
	 * Also determines which options are copied over for ms_(re)set_blog().
	 *
	 * @var bool
	 */
	public $include_in_all = true;

/**
	 * Whether this option is only for when the install is multisite.
	 *
	 * @var bool
	 */
	public $multisite_only = false;

/**
	 * Array of defaults for the option - MUST be set in concrete class.
	 *
	 * Shouldn't be requested directly, use $this->get_defaults();
	 *
	 * @var array
	 */
	protected $defaults;

/**
	 * Array of variable option name patterns for the option - if any.
	 *
	 * Set this when the option contains array keys which vary based on post_type
	 * or taxonomy.
	 *
	 * @var array
	 */
	protected $variable_array_key_patterns;

/**
	 * Array of sub-options which should not be overloaded with multi-site defaults.
	 *
	 * @var array
	 */
	public $ms_exclude = [];

/**
	 * Name for an option higher in the hierarchy to override setting access.
	 *
	 * @var string
	 */
	protected $override_option_name;

/**
	 * Instance of this class.
	 *
	 * @var WPSEO_Option
	 */
	protected static $instance;

/* *********** INSTANTIATION METHODS *********** */

/**
	 * Add all the actions and filters for the option.
	 */
	protected function __construct() {

/* Add filters which get applied to the get_options() results. */
		$this->add_default_filters(); // Return defaults if option not set.
		$this->add_option_filters(); // Merge with defaults if option *is* set.

if ( $this->multisite_only !== true ) {
			/**
			 * The option validation routines remove the default filters to prevent failing
			 * to insert an option if it's new. Let's add them back afterwards.
			 */
			add_action( 'add_option', [ $this, 'add_default_filters_if_same_option' ] ); // Adding back after INSERT.

add_action( 'update_option', [ $this, 'add_default_filters_if_same_option' ] );

add_filter( 'pre_update_option', [ $this, 'add_default_filters_if_not_changed' ], PHP_INT_MAX, 3 );

// Refills the cache when the option has been updated.
			add_action( 'update_option_' . $this->option_name, [ 'WPSEO_Options', 'clear_cache' ], 10 );
		}
		elseif ( is_multisite() ) {
			/*
			 * The option validation routines remove the default filters to prevent failing
			 * to insert an option if it's new. Let's add them back afterwards.
			 *
			 * For site_options, this method is not foolproof as these actions are not fired
			 * on an insert/update failure. Please use the WPSEO_Options::update_site_option() method
			 * for updating site options to make sure the filters are in place.
			 */
			add_action( 'add_site_option_' . $this->option_name, [ $this, 'add_default_filters' ] );
			add_action( 'update_site_option_' . $this->option_name, [ $this, 'add_default_filters' ] );
			add_filter( 'pre_update_site_option_' . $this->option_name, [ $this, 'add_default_filters_if_not_changed' ], PHP_INT_MAX, 3 );

// Refills the cache when the option has been updated.
			add_action( 'update_site_option_' . $this->option_name, [ 'WPSEO_Options', 'clear_cache' ], 1, 0 );
		}

/*
		 * Make sure the option will always get validated, independently of register_setting()
		 * (only available on back-end).
		 */
		add_filter( 'sanitize_option_' . $this->option_name, [ $this, 'validate' ] );

// Flushes the rewrite rules when option is updated.
		add_action( 'update_option_' . $this->option_name, [ 'WPSEO_Utils', 'clear_rewrites' ] );

/* Register our option for the admin pages */
		add_action( 'admin_init', [ $this, 'register_setting' ] );

/* Set option group name if not given */
		if ( ! isset( $this->group_name ) || $this->group_name === '' ) {
			$this->group_name = 'yoast_' . $this->option_name . '_options';
		}

/* Translate some defaults as early as possible - textdomain is loaded in init on priority 1. */
		if ( method_exists( $this, 'translate_defaults' ) ) {
			add_action( 'init', [ $this, 'translate_defaults' ], 2 );
		}

/**
		 * Enrich defaults once custom post types and taxonomies have been registered
		 * which is normally done on the init action.
		 *
		 * @todo [JRF/testers] Verify that none of the options which are only available after
		 * enrichment are used before the enriching.
		 */
		if ( method_exists( $this, 'enrich_defaults' ) ) {
			add_action( 'init', [ $this, 'enrich_defaults' ], 99 );
		}
	}

/*
	 * All concrete classes *must* contain the get_instance method.
	 *
	 * {@internal Unfortunately I can't define it as an abstract as it also *has* to be static...}}
	 *
	 * ```
	 * abstract protected static function get_instance();
	 * ```
	 * ---------------
	 *
	 * Concrete classes *may* contain a translate_defaults method.
	 * ```
	 * abstract public function translate_defaults();
	 * ```
	 * ---------------
	 *
	 * Concrete classes *may* contain an enrich_defaults method to add additional defaults once
	 * all post_types and taxonomies have been registered.
	 *
	 * ```
	 * abstract public function enrich_defaults();
	 * ```
	 */

/* *********** METHODS INFLUENCING get_option() *********** */

/**
	 * Add filters to make sure that the option default is returned if the option is not set.
	 *
	 * @return void
	 */
	public function add_default_filters() {
		// Don't change, needs to check for false as could return prio 0 which would evaluate to false.
		if ( has_filter( 'default_option_' . $this->option_name, [ $this, 'get_defaults' ] ) === false ) {
			add_filter( 'default_option_' . $this->option_name, [ $this, 'get_defaults' ] );
		}
	}

/**
	 * Adds back the default filters that were removed during validation if the option was changed.
	 * Checks if this option was changed to prevent constantly checking if filters are present.
	 *
	 * @param string $option_name The option name.
	 *
	 * @return void
	 */
	public function add_default_filters_if_same_option( $option_name ) {
		if ( $option_name === $this->option_name ) {
			$this->add_default_filters();
		}
	}

/**
	 * Adds back the default filters that were removed during validation if the option was not changed.
	 * This is because in that case the latter actions are not called and thus the filters are never
	 * added back.
	 *
	 * @param mixed  $value       The current value.
	 * @param string $option_name The option name.
	 * @param mixed  $old_value   The old value.
	 *
	 * @return string The current value.
	 */
	public function add_default_filters_if_not_changed( $value, $option_name, $old_value ) {
		if ( $option_name !== $this->option_name ) {
			return $value;
		}

if ( $value === $old_value || maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {
			$this->add_default_filters();
		}

return $value;
	}

/**
	 * Validate webmaster tools & Pinterest verification strings.
	 *
	 * @param string $key   Key to check, by type of service.
	 * @param array  $dirty Dirty data with the new values.
	 * @param array  $old   Old data.
	 * @param array  $clean Clean data by reference, normally the default values.
	 */
	public function validate_verification_string( $key, $dirty, $old, &$clean ) {
		if ( isset( $dirty[ $key ] ) && $dirty[ $key ] !== '' ) {
			$meta = $dirty[ $key ];
			if ( strpos( $meta, 'content=' ) ) {
				// Make sure we only have the real key, not a complete meta tag.
				preg_match( '`content=([\'"])?([^\'"> ]+)(?:\1|[ />])`', $meta, $match );
				if ( isset( $match[2] ) ) {
					$meta = $match[2];
				}
				unset( $match );
			}

$meta = sanitize_text_field( $meta );
			if ( $meta !== '' ) {
				$regex   = '`^[A-Fa-f0-9_-]+$`';
				$service = '';

switch ( $key ) {
					case 'baiduverify':
						$regex   = '`^[A-Za-z0-9_-]+$`';
						$service = 'Baidu Webmaster tools';
						break;

case 'googleverify':
						$regex   = '`^[A-Za-z0-9_-]+$`';
						$service = 'Google Webmaster tools';
						break;

case 'msverify':
						$service = 'Bing Webmaster tools';
						break;

case 'pinterestverify':
						$service = 'Pinterest';
						break;

case 'yandexverify':
						$service = 'Yandex Webmaster tools';
						break;
				}

if ( preg_match( $regex, $meta ) ) {
					$clean[ $key ] = $meta;
				}
				else {
					// Restore the previous value, if any.
					if ( isset( $old[ $key ] ) && preg_match( $regex, $old[ $key ] ) ) {
						$clean[ $key ] = $old[ $key ];
					}

if ( function_exists( 'add_settings_error' ) ) {
						add_settings_error(
							$this->group_name, // Slug title of the setting.
							$key, // Suffix-ID for the error message box. WordPress prepends `setting-error-`.
							/* translators: 1: Verification string from user input; 2: Service name. */
							sprintf( __( '%1$s does not seem to be a valid %2$s verification string. Please correct.', 'wordpress-seo' ), '<strong>' . esc_html( $meta ) . '</strong>', $service ), // The error message.
							'error' // CSS class for the WP notice, either the legacy 'error' / 'updated' or the new `notice-*` ones.
						);
					}

Yoast_Input_Validation::add_dirty_value_to_settings_errors( $key, $meta );
				}
			}
		}
	}

/**
	 * Validates an option as a valid URL. Prints out a WordPress settings error
	 * notice if the URL is invalid.
	 *
	 * @param string $key   Key to check, by type of URL setting.
	 * @param array  $dirty Dirty data with the new values.
	 * @param array  $old   Old data.
	 * @param array  $clean Clean data by reference, normally the default values.
	 */
	public function validate_url( $key, $dirty, $old, &$clean ) {
		if ( isset( $dirty[ $key ] ) && $dirty[ $key ] !== '' ) {

$submitted_url = trim( $dirty[ $key ] );
			$validated_url = filter_var( WPSEO_Utils::sanitize_url( $submitted_url ), FILTER_VALIDATE_URL );

if ( $validated_url === false ) {
				if ( function_exists( 'add_settings_error' ) ) {
					add_settings_error(
						// Slug title of the setting.
						$this->group_name,
						// Suffix-ID for the error message box. WordPress prepends `setting-error-`.
						$key,
						// The error message.
						sprintf(
							/* translators: %s expands to an invalid URL. */
							__( '%s does not seem to be a valid url. Please correct.', 'wordpress-seo' ),
							'<strong>' . esc_url( $submitted_url ) . '</strong>'
						),
						// Message type.
						'error'
					);
				}

// Restore the previous URL value, if any.
				if ( isset( $old[ $key ] ) && $old[ $key ] !== '' ) {
					$url = WPSEO_Utils::sanitize_url( $old[ $key ] );
					if ( $url !== '' ) {
						$clean[ $key ] = $url;
					}
				}

Yoast_Input_Validation::add_dirty_value_to_settings_errors( $key, $submitted_url );

return;
			}

// The URL format is valid, let's sanitize it.
			$url = WPSEO_Utils::sanitize_url( $validated_url );

if ( $url !== '' ) {
				$clean[ $key ] = $url;
			}
		}
	}

/**
	 * Remove the default filters.
	 * Called from the validate() method to prevent failure to add new options.
	 *
	 * @return void
	 */
	public function remove_default_filters() {
		remove_filter( 'default_option_' . $this->option_name, [ $this, 'get_defaults' ] );
	}

/**
	 * Get the enriched default value for an option.
	 *
	 * Checks if the concrete class contains an enrich_defaults() method and if so, runs it.
	 *
	 * {@internal The enrich_defaults method is used to set defaults for variable array keys
	 *            in an option, such as array keys depending on post_types and/or taxonomies.}}
	 *
	 * @return array
	 */
	public function get_defaults() {
		if ( method_exists( $this, 'translate_defaults' ) ) {
			$this->translate_defaults();
		}

if ( method_exists( $this, 'enrich_defaults' ) ) {
			$this->enrich_defaults();
		}

return apply_filters( 'wpseo_defaults', $this->defaults, $this->option_name );
	}

/**
	 * Add filters to make sure that the option is merged with its defaults before being returned.
	 *
	 * @return void
	 */
	public function add_option_filters() {
		// Don't change, needs to check for false as could return prio 0 which would evaluate to false.
		if ( has_filter( 'option_' . $this->option_name, [ $this, 'get_option' ] ) === false ) {
			add_filter( 'option_' . $this->option_name, [ $this, 'get_option' ] );
		}
	}

/**
	 * Remove the option filters.
	 * Called from the clean_up methods to make sure we retrieve the original old option.
	 *
	 * @return void
	 */
	public function remove_option_filters() {
		remove_filter( 'option_' . $this->option_name, [ $this, 'get_option' ] );
	}

/**
	 * Merge an option with its default values.
	 *
	 * This method should *not* be called directly!!! It is only meant to filter the get_option() results.
	 *
	 * @param mixed $options Option value.
	 *
	 * @return mixed Option merged with the defaults for that option.
	 */
	public function get_option( $options = null ) {
		$filtered = $this->array_filter_merge( $options );

/*
		 * If the option contains variable option keys, make sure we don't remove those settings
		 * - even if the defaults are not complete yet.
		 * Unfortunately this means we also won't be removing the settings for post types or taxonomies
		 * which are no longer in the WP install, but rather that than the other way around.
		 */
		if ( isset( $this->variable_array_key_patterns ) ) {
			$filtered = $this->retain_variable_keys( $options, $filtered );
		}

return $filtered;
	}

/* *********** METHODS influencing add_option(), update_option() and saving from admin pages. *********** */

/**
	 * Register (whitelist) the option for the configuration pages.
	 * The validation callback is already registered separately on the sanitize_option hook,
	 * so no need to double register.
	 *
	 * @return void
	 */
	public function register_setting() {
		if ( ! WPSEO_Capability_Utils::current_user_can( 'wpseo_manage_options' ) ) {
			return;
		}

if ( $this->multisite_only === true ) {
			$network_settings_api = Yoast_Network_Settings_API::get();
			if ( $network_settings_api->meets_requirements() ) {
				$network_settings_api->register_setting( $this->group_name, $this->option_name );
			}
			return;
		}

register_setting( $this->group_name, $this->option_name );
	}

/**
	 * Validate the option.
	 *
	 * @param mixed $option_value The unvalidated new value for the option.
	 *
	 * @return array Validated new value for the option.
	 */
	public function validate( $option_value ) {
		$clean = $this->get_defaults();

/* Return the defaults if the new value is empty. */
		if ( ! is_array( $option_value ) || $option_value === [] ) {
			return $clean;
		}

$option_value = array_map( [ 'WPSEO_Utils', 'trim_recursive' ], $option_value );

$old = $this->get_original_option();
		if ( ! is_array( $old ) ) {
			$old = [];
		}
		$old = array_merge( $clean, $old );

$clean = $this->validate_option( $option_value, $clean, $old );

// Prevent updates to variables that are disabled via the override option.
		$clean = $this->prevent_disabled_options_update( $clean, $old );

/* Retain the values for variable array keys even when the post type/taxonomy is not yet registered. */
		if ( isset( $this->variable_array_key_patterns ) ) {
			$clean = $this->retain_variable_keys( $option_value, $clean );
		}

$this->remove_default_filters();

return $clean;
	}

/**
	 * Checks whether a specific option key is disabled.
	 *
	 * This is determined by whether an override option is available with a key that equals the given key prefixed
	 * with 'allow_'.
	 *
	 * @param string $key Option key.
	 *
	 * @return bool True if option key is disabled, false otherwise.
	 */
	public function is_disabled( $key ) {
		$override_option = $this->get_override_option();
		if ( empty( $override_option ) ) {
			return false;
		}

return isset( $override_option[ self::ALLOW_KEY_PREFIX . $key ] ) && ! $override_option[ self::ALLOW_KEY_PREFIX . $key ];
	}

/**
	 * All concrete classes must contain a validate_option() method which validates all
	 * values within the option.
	 *
	 * @param array $dirty New value for the option.
	 * @param array $clean Clean value for the option, normally the defaults.
	 * @param array $old   Old value of the option.
	 */
	abstract protected function validate_option( $dirty, $clean, $old );

/* *********** METHODS for ADDING/UPDATING/UPGRADING the option. *********** */

/**
	 * Retrieve the real old value (unmerged with defaults).
	 *
	 * @return array|bool The original option value (which can be false if the option doesn't exist).
	 */
	protected function get_original_option() {
		$this->remove_default_filters();
		$this->remove_option_filters();

// Get (unvalidated) array, NOT merged with defaults.
		if ( $this->multisite_only !== true ) {
			$option_value = get_option( $this->option_name );
		}
		else {
			$option_value = get_site_option( $this->option_name );
		}

$this->add_option_filters();
		$this->add_default_filters();

return $option_value;
	}

/**
	 * Add the option if it doesn't exist for some strange reason.
	 *
	 * @uses WPSEO_Option::get_original_option()
	 *
	 * @return void
	 */
	public function maybe_add_option() {
		if ( $this->get_original_option() === false ) {
			if ( $this->multisite_only !== true ) {
				update_option( $this->option_name, $this->get_defaults() );
			}
			else {
				$this->update_site_option( $this->get_defaults() );
			}
		}
	}

/**
	 * Update a site_option.
	 *
	 * {@internal This special method is only needed for multisite options, but very needed indeed there.
	 *            The order in which certain functions and hooks are run is different between
	 *            get_option() and get_site_option() which means in practice that the removing
	 *            of the default filters would be done too late and the re-adding of the default
	 *            filters might not be done at all.
	 *            Aka: use the WPSEO_Options::update_site_option() method (which calls this method)
	 *            for safely adding/updating multisite options.}}
	 *
	 * @param mixed $value The new value for the option.
	 *
	 * @return bool Whether the update was successful.
	 */
	public function update_site_option( $value ) {
		if ( $this->multisite_only === true && is_multisite() ) {
			$this->remove_default_filters();
			$result = update_site_option( $this->option_name, $value );
			$this->add_default_filters();

return $result;
		}
		else {
			return false;
		}
	}

/**
	 * Retrieve the real old value (unmerged with defaults), clean and re-save the option.
	 *
	 * @uses WPSEO_Option::get_original_option()
	 * @uses WPSEO_Option::import()
	 *
	 * @param string|null $current_version Optional. Version from which to upgrade, if not set,
	 *                                     version-specific upgrades will be disregarded.
	 *
	 * @return void
	 */
	public function clean( $current_version = null ) {
		$option_value = $this->get_original_option();
		$this->import( $option_value, $current_version );
	}

/**
	 * Clean and re-save the option.
	 *
	 * @uses clean_option() method from concrete class if it exists.
	 *
	 * @todo [JRF/whomever] Figure out a way to show settings error during/after the upgrade - maybe
	 * something along the lines of:
	 * -> add them to a property in this class
	 * -> if that property isset at the end of the routine and add_settings_error function does not exist,
	 *    save as transient (or update the transient if one already exists)
	 * -> next time an admin is in the WP back-end, show the errors and delete the transient or only delete it
	 *    once the admin has dismissed the message (add ajax function)
	 * Important: all validation routines which add_settings_errors would need to be changed for this to work
	 *
	 * @param array       $option_value          Option value to be imported.
	 * @param string|null $current_version       Optional. Version from which to upgrade, if not set,
	 *                                           version-specific upgrades will be disregarded.
	 * @param array|null  $all_old_option_values Optional. Only used when importing old options to
	 *                                           have access to the real old values, in contrast to
	 *                                           the saved ones.
	 *
	 * @return void
	 */
	public function import( $option_value, $current_version = null, $all_old_option_values = null ) {
		if ( $option_value === false ) {
			$option_value = $this->get_defaults();
		}
		elseif ( is_array( $option_value ) && method_exists( $this, 'clean_option' ) ) {
			$option_value = $this->clean_option( $option_value, $current_version, $all_old_option_values );
		}

/*
		 * Save the cleaned value - validation will take care of cleaning out array keys which
		 * should no longer be there.
		 */
		if ( $this->multisite_only !== true ) {
			update_option( $this->option_name, $option_value );
		}
		else {
			$this->update_site_option( $this->option_name, $option_value );
		}
	}

/**
	 * Returns the variable array key patterns for an options class.
	 *
	 * @return array
	 */
	public function get_patterns() {
		return (array) $this->variable_array_key_patterns;
	}

/**
	 * Retrieves the option name.
	 *
	 * @return string The set option name.
	 */
	public function get_option_name() {
		return $this->option_name;
	}

/*
	 * Concrete classes *may* contain a clean_option method which will clean out old/renamed
	 * values within the option.
	 *
	 * ```
	 * abstract public function clean_option( $option_value, $current_version = null, $all_old_option_values = null );
	 * ```
	 */

/* *********** HELPER METHODS for internal use. *********** */

/**
	 * Helper method - Combines a fixed array of default values with an options array
	 * while filtering out any keys which are not in the defaults array.
	 *
	 * @todo [JRF] - shouldn't this be a straight array merge ? at the end of the day, the validation
	 * removes any invalid keys on save.
	 *
	 * @param array|null $options Optional. Current options. If not set, the option defaults
	 *                            for the $option_key will be returned.
	 *
	 * @return array Combined and filtered options array.
	 */
	protected function array_filter_merge( $options = null ) {

$defaults = $this->get_defaults();

if ( ! isset( $options ) || $options === false || $options === [] ) {
			return $defaults;
		}

$options = (array) $options;

/*
			$filtered = array();

if ( $defaults !== array() ) {
				foreach ( $defaults as $key => $default_value ) {
					// @todo should this walk through array subkeys ?
					$filtered[ $key ] = ( isset( $options[ $key ] ) ? $options[ $key ] : $default_value );
				}
			}
		*/
		$filtered = array_merge( $defaults, $options );

return $filtered;
	}

/**
	 * Sets updated values for variables that are disabled via the override option back to their previous values.
	 *
	 * @param array $updated Updated option value.
	 * @param array $old     Old option value.
	 *
	 * @return array Updated option value, with all disabled variables set to their old values.
	 */
	protected function prevent_disabled_options_update( $updated, $old ) {
		$override_option = $this->get_override_option();
		if ( empty( $override_option ) ) {
			return $updated;
		}

/*
		 * This loop could as well call `is_disabled( $key )` for each iteration,
		 * however this would be worse performance-wise.
		 */
		foreach ( $old as $key => $value ) {
			if ( isset( $override_option[ self::ALLOW_KEY_PREFIX . $key ] ) && ! $override_option[ self::ALLOW_KEY_PREFIX . $key ] ) {
				$updated[ $key ] = $old[ $key ];
			}
		}

return $updated;
	}

/**
	 * Retrieves the value of the override option, if available.
	 *
	 * An override option contains values that may determine access to certain sub-variables
	 * of this option.
	 *
	 * Only regular options in multisite can have override options, which in that case
	 * would be network options.
	 *
	 * @return array Override option value, or empty array if unavailable.
	 */
	protected function get_override_option() {
		if ( empty( $this->override_option_name ) || $this->multisite_only === true || ! is_multisite() ) {
			return [];
		}

return get_site_option( $this->override_option_name, [] );
	}

/**
	 * Make sure that any set option values relating to post_types and/or taxonomies are retained,
	 * even when that post_type or taxonomy may not yet have been registered.
	 *
	 * {@internal The wpseo_titles concrete class overrules this method. Make sure that any
	 *            changes applied here, also get ported to that version.}}
	 *
	 * @param array $dirty Original option as retrieved from the database.
	 * @param array $clean Filtered option where any options which shouldn't be in our option
	 *                     have already been removed and any options which weren't set
	 *                     have been set to their defaults.
	 *
	 * @return array
	 */
	protected function retain_variable_keys( $dirty, $clean ) {
		if ( ( is_array( $this->variable_array_key_patterns ) && $this->variable_array_key_patterns !== [] ) && ( is_array( $dirty ) && $dirty !== [] ) ) {
			foreach ( $dirty as $key => $value ) {

// Do nothing if already in filtered options.
				if ( isset( $clean[ $key ] ) ) {
					continue;
				}

foreach ( $this->variable_array_key_patterns as $pattern ) {

if ( strpos( $key, $pattern ) === 0 ) {
						$clean[ $key ] = $value;
						break;
					}
				}
			}
		}

return $clean;
	}

/**
	 * Check whether a given array key conforms to one of the variable array key patterns for this option.
	 *
	 * @usedby validate_option() methods for options with variable array keys.
	 *
	 * @param string $key Array key to check.
	 *
	 * @return string Pattern if it conforms, original array key if it doesn't or if the option
	 *                does not have variable array keys.
	 */
	protected function get_switch_key( $key ) {
		if ( ! isset( $this->variable_array_key_patterns ) || ( ! is_array( $this->variable_array_key_patterns ) || $this->variable_array_key_patterns === [] ) ) {
			return $key;
		}

foreach ( $this->variable_array_key_patterns as $pattern ) {
			if ( strpos( $key, $pattern ) === 0 ) {
				return $pattern;
			}
		}

return $key;
	}
}

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