<?php

/**

 * Option API

 *

 * @package WordPress

 * @subpackage Option

 */

/**

 * Retrieves an option value based on an option name.

 *

 * If the option does not exist or does not have a value, then the return value

 * will be false. This is useful to check whether you need to install an option

 * and is commonly used during installation of plugin options and to test

 * whether upgrading is required.

 *

 * If the option was serialized then it will be unserialized when it is returned.

 *

 * Any scalar values will be returned as strings. You may coerce the return type of

 * a given option by registering an {@see 'option_$option'} filter callback.

 *

 * @since 1.5.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param mixed  $default Optional. Default value to return if the option does not exist.

 * @return mixed Value set for the option.

 */

function get_option( $option, $default = false ) {

	global $wpdb;

	$option = trim( $option );

	if ( empty( $option ) ) {

		return false;

	}

	/**

	 * Filters the value of an existing option before it is retrieved.

	 *

	 * The dynamic portion of the hook name, `$option`, refers to the option name.

	 *

	 *

	 * @since 1.5.0

	 * @since 4.4.0 The `$option` parameter was added.

	 * @since 4.9.0 The `$default` parameter was added.

	 *

	 */

	$pre = apply_filters( "pre_option_{$option}", false, $option, $default );

	if ( false !== $pre ) {

		return $pre;

	}

	if ( defined( 'WP_SETUP_CONFIG' ) ) {

		return false;

	}

	// Distinguish between `false` as a default, and not passing one.

	$passed_default = func_num_args() > 1;

	if ( ! wp_installing() ) {

		$notoptions = wp_cache_get( 'notoptions', 'options' );

		if ( isset( $notoptions[ $option ] ) ) {

			/**

			 * Filters the default value for an option.

			 *

			 * The dynamic portion of the hook name, `$option`, refers to the option name.

			 *

			 * @since 3.4.0

			 * @since 4.4.0 The `$option` parameter was added.

			 * @since 4.7.0 The `$passed_default` parameter was added to distinguish between a `false` value and the default parameter value.

			 *

			 * @param mixed  $default The default value to return if the option does not exist

			 *                        in the database.

			 * @param string $option  Option name.

			 * @param bool   $passed_default Was `get_option()` passed a default value?

			 */

			return apply_filters( "default_option_{$option}", $default, $option, $passed_default );

		}

		$alloptions = wp_load_alloptions();

		if ( isset( $alloptions[ $option ] ) ) {

			$value = $alloptions[ $option ];

		} else {

			$value = wp_cache_get( $option, 'options' );

			if ( false === $value ) {

				$row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );

				if ( is_object( $row ) ) {

					$value = $row->option_value;

					wp_cache_add( $option, $value, 'options' );

					if ( ! is_array( $notoptions ) ) {

						$notoptions = array();

					}

					$notoptions[ $option ] = true;

					wp_cache_set( 'notoptions', $notoptions, 'options' );

					/** This filter is documented in wp-includes/option.php */

					return apply_filters( "default_option_{$option}", $default, $option, $passed_default );

				}

			}

		}

	} else {

		$suppress = $wpdb->suppress_errors();

		$row      = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );

		$wpdb->suppress_errors( $suppress );

		if ( is_object( $row ) ) {

			$value = $row->option_value;

		} else {

			/** This filter is documented in wp-includes/option.php */

			return apply_filters( "default_option_{$option}", $default, $option, $passed_default );

		}

	}

		return get_option( 'siteurl' );

	}

		$value = untrailingslashit( $value );

	}

	/**

	 * Filters the value of an existing option.

	 *

	 * The dynamic portion of the hook name, `$option`, refers to the option name.

	 *

	 * @since 1.5.0 As 'option_' . $setting

	 * @since 3.0.0

	 * @since 4.4.0 The `$option` parameter was added.

	 *

	 * @param mixed  $value  Value of the option. If stored serialized, it will be

	 *                       unserialized prior to being returned.

	 * @param string $option Option name.

	 */

	return apply_filters( "option_{$option}", maybe_unserialize( $value ), $option );

}

/**

 *

 * Will die if $option is in protected list. Protected options are 'alloptions'

 * and 'notoptions' options.

 *

 * @since 2.2.0

 *

 * @param string $option Option name.

 */

function wp_protect_special_option( $option ) {

	if ( 'alloptions' === $option || 'notoptions' === $option ) {

	}

}

/**

 *

 * @since 1.5.0

 *

 * @param string $option Option name.

 */

function form_option( $option ) {

	echo esc_attr( get_option( $option ) );

}

/**

 * Loads and caches all autoloaded options, if available or all options.

 *

 * @since 2.2.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @return array List of all options.

 */

	global $wpdb;

	if ( ! wp_installing() || ! is_multisite() ) {

	} else {

		$alloptions = false;

	}

	if ( ! $alloptions ) {

			$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );

		}

		$wpdb->suppress_errors( $suppress );

		$alloptions = array();

		foreach ( (array) $alloptions_db as $o ) {

			$alloptions[ $o->option_name ] = $o->option_value;

		}

		if ( ! wp_installing() || ! is_multisite() ) {

			/**

			 * Filters all options before caching them.

			 *

			 * @since 4.9.0

			 *

			 * @param array $alloptions Array with all options.

			 */

			$alloptions = apply_filters( 'pre_cache_alloptions', $alloptions );

			wp_cache_add( 'alloptions', $alloptions, 'options' );

		}

	}

	/**

	 * Filters all options after retrieving them.

	 *

	 * @since 4.9.0

	 *

	 * @param array $alloptions Array with all options.

	 */

	return apply_filters( 'alloptions', $alloptions );

}

/**

 * Loads and caches certain often requested site options if is_multisite() and a persistent cache is not being used.

 *

 * @since 3.0.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int $network_id Optional site ID for which to query the options. Defaults to the current site.

 */

function wp_load_core_site_options( $network_id = null ) {

	global $wpdb;

	if ( ! is_multisite() || wp_using_ext_object_cache() || wp_installing() ) {

		return;

	}

	if ( empty( $network_id ) ) {

		$network_id = get_current_network_id();

	}

	$core_options = array( 'site_name', 'siteurl', 'active_sitewide_plugins', '_site_transient_timeout_theme_roots', '_site_transient_theme_roots', 'site_admins', 'can_compress_scripts', 'global_terms_enabled', 'ms_files_rewriting' );

	$core_options_in = "'" . implode( "', '", $core_options ) . "'";

	$options         = $wpdb->get_results( $wpdb->prepare( "SELECT meta_key, meta_value FROM $wpdb->sitemeta WHERE meta_key IN ($core_options_in) AND site_id = %d", $network_id ) );

	foreach ( $options as $option ) {

		$key                = $option->meta_key;

		$cache_key          = "{$network_id}:$key";

		$option->meta_value = maybe_unserialize( $option->meta_value );

		wp_cache_set( $cache_key, $option->meta_value, 'site-options' );

	}

}

/**

 *

 *

 *

 * @since 1.0.0

 * @since 4.2.0 The `$autoload` parameter was added.

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param mixed       $value    Option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.

 * @param string|bool $autoload Optional. Whether to load the option when WordPress starts up. For existing options,

 *                              `$autoload` can only be updated using `update_option()` if `$value` is also changed.

 *                              Accepts 'yes'|true to enable or 'no'|false to disable. For non-existent options,

 *                              the default value is 'yes'. Default null.

 */

function update_option( $option, $value, $autoload = null ) {

	global $wpdb;

	$option = trim( $option );

	if ( empty( $option ) ) {

		return false;

	}

	wp_protect_special_option( $option );

	if ( is_object( $value ) ) {

		$value = clone $value;

	}

	$value     = sanitize_option( $option, $value );

	$old_value = get_option( $option );

	/**

	 * Filters a specific option before its value is (maybe) serialized and updated.

	 *

	 * The dynamic portion of the hook name, `$option`, refers to the option name.

	 *

	 * @since 2.6.0

	 * @since 4.4.0 The `$option` parameter was added.

	 *

	 * @param mixed  $value     The new, unserialized option value.

	 * @param mixed  $old_value The old option value.

	 * @param string $option    Option name.

	 */

	$value = apply_filters( "pre_update_option_{$option}", $value, $old_value, $option );

	/**

	 * Filters an option before its value is (maybe) serialized and updated.

	 *

	 * @since 3.9.0

	 *

	 * @param mixed  $value     The new, unserialized option value.

	 * @param string $option    Name of the option.

	 * @param mixed  $old_value The old option value.

	 */

	$value = apply_filters( 'pre_update_option', $value, $option, $old_value );

	/*

	 * If the new and old values are the same, no need to update.

	 *

	 * Unserialized values will be adequate in most cases. If the unserialized

	 * data differs, the (maybe) serialized data is checked to avoid

	 * unnecessary database calls for otherwise identical object instances.

	 *

	 * See https://core.trac.wordpress.org/ticket/38903

	 */

	if ( $value === $old_value || maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {

		return false;

	}

	/** This filter is documented in wp-includes/option.php */

	if ( apply_filters( "default_option_{$option}", false, $option, false ) === $old_value ) {

		// Default setting for new options is 'yes'.

		if ( null === $autoload ) {

			$autoload = 'yes';

		}

		return add_option( $option, $value, '', $autoload );

	}

	$serialized_value = maybe_serialize( $value );