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<?php
/**
* Option API
*
* @package WordPress
* @subpackage Option
*/
/**
* Retrieve option value based on name of option.
*
* 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 a
* 'option_{$option}' filter callback.
*
* @since 1.5.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
* @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( $option ) )
return false;
/**
* Filter the value of an existing option before it is retrieved.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* Passing a truthy value to the filter will short-circuit retrieving
* the option value, returning the passed value instead.
*
* @since 1.5.0
* @since 4.4.0 The `$option` parameter was added.
*
* @param bool|mixed $pre_option Value to return instead of the option value.
* Default false to skip it.
* @param string $option Option name.
*/
$pre = apply_filters( 'pre_option_' . $option, false, $option );
if ( false !== $pre )
return $pre;
if ( defined( 'WP_SETUP_CONFIG' ) )
return false;
if ( ! wp_installing() ) {
// prevent non-existent options from triggering multiple queries
$notoptions = wp_cache_get( 'notoptions', 'options' );
if ( isset( $notoptions[ $option ] ) ) {
/**
* Filter the default value for an option.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 3.4.0
* @since 4.4.0 The `$option` parameter was added.
*
* @param mixed $default The default value to return if the option does not exist
* in the database.
* @param string $option Option name.
*/
return apply_filters( 'default_option_' . $option, $default, $option );
}
$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 ) );
// Has to be get_row instead of get_var because of funkiness with 0, false, null values
if ( is_object( $row ) ) {
$value = $row->option_value;
wp_cache_add( $option, $value, 'options' );
} else { // option does not exist, so we must cache its non-existence
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 );
}
}
}
} 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 );
}
}
// If home is not set use siteurl.
if ( 'home' == $option && '' == $value )
return get_option( 'siteurl' );
if ( in_array( $option, array('siteurl', 'home', 'category_base', 'tag_base') ) )
$value = untrailingslashit( $value );
/**
* Filter the value of an existing option.
*
* The dynamic portion of the hook name, `$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 );
}
/**
* Protect WordPress special option from being modified.
*
* 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 )
wp_die( sprintf( __( '%s is a protected WP option and may not be modified' ), esc_html( $option ) ) );
}
/**
* Print option value after sanitizing for forms.
*
* @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.
*/
function wp_load_alloptions() {
global $wpdb;
if ( ! wp_installing() || ! is_multisite() )
$alloptions = wp_cache_get( 'alloptions', 'options' );
else
$alloptions = false;
if ( !$alloptions ) {
$suppress = $wpdb->suppress_errors();
if ( !$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE autoload = 'yes'" ) )
$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() )
wp_cache_add( 'alloptions', $alloptions, 'options' );
}
return $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 $site_id Optional site ID for which to query the options. Defaults to the current site.
*/
function wp_load_core_site_options( $site_id = null ) {
global $wpdb;
if ( ! is_multisite() || wp_using_ext_object_cache() || wp_installing() )
return;
if ( empty($site_id) )
$site_id = $wpdb->siteid;
$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", $site_id) );
foreach ( $options as $option ) {
$key = $option->meta_key;
$cache_key = "{$site_id}:$key";
$option->meta_value = maybe_unserialize( $option->meta_value );
wp_cache_set( $cache_key, $option->meta_value, 'site-options' );
}
}
/**
* Update the value of an option that was already added.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* If the option does not exist, then the option will be added with the option value,
* with an `$autoload` value of 'yes'.
*
* @since 1.0.0
* @since 4.2.0 The `$autoload` parameter was added.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $option Option name. Expected to not be SQL-escaped.
* @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.
* @return bool False if value was not updated and true if value was updated.
*/
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( $option );
/**
* Filter a specific option before its value is (maybe) serialized and updated.
*
* The dynamic portion of the hook name, `$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 );
/**
* Filter 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.
if ( $value === $old_value )
return false;
/** This filter is documented in wp-includes/option.php */
if ( apply_filters( 'default_option_' . $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 );
/**
* Fires immediately before an option value is updated.
*
* @since 2.9.0
*
* @param string $option Name of the option to update.
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
*/
do_action( 'update_option', $option, $old_value, $value );
$update_args = array(
'option_value' => $serialized_value,
);
if ( null !== $autoload ) {
$update_args['autoload'] = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
}
$result = $wpdb->update( $wpdb->options, $update_args, array( 'option_name' => $option ) );
if ( ! $result )
return false;
$notoptions = wp_cache_get( 'notoptions', 'options' );
if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
unset( $notoptions[$option] );
wp_cache_set( 'notoptions', $notoptions, 'options' );
}
if ( ! wp_installing() ) {
$alloptions = wp_load_alloptions();
if ( isset( $alloptions[$option] ) ) {
$alloptions[ $option ] = $serialized_value;
wp_cache_set( 'alloptions', $alloptions, 'options' );
} else {
wp_cache_set( $option, $serialized_value, 'options' );
}
}
/**
* Fires after the value of a specific option has been successfully updated.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.0.1
* @since 4.4.0 The `$option` parameter was added.
*
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
* @param string $option Option name.
*/
do_action( "update_option_{$option}", $old_value, $value, $option );
/**
* Fires after the value of an option has been successfully updated.
*
* @since 2.9.0
*
* @param string $option Name of the updated option.
* @param mixed $old_value The old option value.
* @param mixed $value The new option value.
*/
do_action( 'updated_option', $option, $old_value, $value );
return true;
}
/**
* Add a new option.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* You can create options without values and then update the values later.
* Existing options will not be updated and checks are performed to ensure that you
* aren't adding a protected WordPress option. Care should be taken to not name
* options the same as the ones which are protected.
*
* @since 1.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $option Name of option to add. Expected to not be SQL-escaped.
* @param mixed $value Optional. Option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.
* @param string $deprecated Optional. Description. Not used anymore.
* @param string|bool $autoload Optional. Whether to load the option when WordPress starts up.
* Default is enabled. Accepts 'no' to disable for legacy reasons.
* @return bool False if option was not added and true if option was added.
*/
function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' ) {
global $wpdb;
if ( !empty( $deprecated ) )
_deprecated_argument( __FUNCTION__, '2.3' );
$option = trim($option);
if ( empty($option) )
return false;
wp_protect_special_option( $option );
if ( is_object($value) )
$value = clone $value;
$value = sanitize_option( $option, $value );
// Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query
$notoptions = wp_cache_get( 'notoptions', 'options' );
if ( !is_array( $notoptions ) || !isset( $notoptions[$option] ) )
/** This filter is documented in wp-includes/option.php */
if ( apply_filters( 'default_option_' . $option, false ) !== get_option( $option ) )
return false;
$serialized_value = maybe_serialize( $value );
$autoload = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes';
/**
* Fires before an option is added.
*
* @since 2.9.0
*
* @param string $option Name of the option to add.
* @param mixed $value Value of the option.
*/
do_action( 'add_option', $option, $value );
$result = $wpdb->query( $wpdb->prepare( "INSERT INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)", $option, $serialized_value, $autoload ) );
if ( ! $result )
return false;
if ( ! wp_installing() ) {
if ( 'yes' == $autoload ) {
$alloptions = wp_load_alloptions();
$alloptions[ $option ] = $serialized_value;
wp_cache_set( 'alloptions', $alloptions, 'options' );
} else {
wp_cache_set( $option, $serialized_value, 'options' );
}
}
// This option exists now
$notoptions = wp_cache_get( 'notoptions', 'options' ); // yes, again... we need it to be fresh
if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
unset( $notoptions[$option] );
wp_cache_set( 'notoptions', $notoptions, 'options' );
}
/**
* Fires after a specific option has been added.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.5.0 As "add_option_{$name}"
* @since 3.0.0
*
* @param string $option Name of the option to add.
* @param mixed $value Value of the option.
*/
do_action( "add_option_{$option}", $option, $value );
/**
* Fires after an option has been added.
*
* @since 2.9.0
*
* @param string $option Name of the added option.
* @param mixed $value Value of the option.
*/
do_action( 'added_option', $option, $value );
return true;
}
/**
* Removes option by name. Prevents removal of protected WordPress options.
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $option Name of option to remove. Expected to not be SQL-escaped.
* @return bool True, if option is successfully deleted. False on failure.
*/
function delete_option( $option ) {
global $wpdb;
$option = trim( $option );
if ( empty( $option ) )
return false;
wp_protect_special_option( $option );
// Get the ID, if no ID then return
$row = $wpdb->get_row( $wpdb->prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option ) );
if ( is_null( $row ) )
return false;
/**
* Fires immediately before an option is deleted.
*
* @since 2.9.0
*
* @param string $option Name of the option to delete.
*/
do_action( 'delete_option', $option );
$result = $wpdb->delete( $wpdb->options, array( 'option_name' => $option ) );
if ( ! wp_installing() ) {
if ( 'yes' == $row->autoload ) {
$alloptions = wp_load_alloptions();
if ( is_array( $alloptions ) && isset( $alloptions[$option] ) ) {
unset( $alloptions[$option] );
wp_cache_set( 'alloptions', $alloptions, 'options' );
}
} else {
wp_cache_delete( $option, 'options' );
}
}
if ( $result ) {
/**
* Fires after a specific option has been deleted.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 3.0.0
*
* @param string $option Name of the deleted option.
*/
do_action( "delete_option_$option", $option );
/**
* Fires after an option has been deleted.
*
* @since 2.9.0
*
* @param string $option Name of the deleted option.
*/
do_action( 'deleted_option', $option );
return true;
}
return false;
}
/**
* Delete a transient.
*
* @since 2.8.0
*
* @param string $transient Transient name. Expected to not be SQL-escaped.
* @return bool true if successful, false otherwise
*/
function delete_transient( $transient ) {
/**
* Fires immediately before a specific transient is deleted.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
*
* @param string $transient Transient name.
*/
do_action( 'delete_transient_' . $transient, $transient );
if ( wp_using_ext_object_cache() ) {
$result = wp_cache_delete( $transient, 'transient' );
} else {
$option_timeout = '_transient_timeout_' . $transient;
$option = '_transient_' . $transient;
$result = delete_option( $option );
if ( $result )
delete_option( $option_timeout );
}
if ( $result ) {
/**
* Fires after a transient is deleted.
*
* @since 3.0.0
*
* @param string $transient Deleted transient name.
*/
do_action( 'deleted_transient', $transient );
}
return $result;
}
/**
* Get the value of a transient.
*
* If the transient does not exist, does not have a value, or has expired,
* then the return value will be false.
*
* @since 2.8.0
*
* @param string $transient Transient name. Expected to not be SQL-escaped.
* @return mixed Value of transient.
*/
function get_transient( $transient ) {
/**
* Filter the value of an existing transient.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* Passing a truthy value to the filter will effectively short-circuit retrieval
* of the transient, returning the passed value instead.
*
* @since 2.8.0
* @since 4.4.0 The `$transient` parameter was added
*
* @param mixed $pre_transient The default value to return if the transient does not exist.
* Any value other than false will short-circuit the retrieval
* of the transient, and return the returned value.
* @param string $transient Transient name.
*/
$pre = apply_filters( 'pre_transient_' . $transient, false, $transient );
if ( false !== $pre )
return $pre;
if ( wp_using_ext_object_cache() ) {
$value = wp_cache_get( $transient, 'transient' );
} else {
$transient_option = '_transient_' . $transient;
if ( ! wp_installing() ) {
// If option is not in alloptions, it is not autoloaded and thus has a timeout
$alloptions = wp_load_alloptions();
if ( !isset( $alloptions[$transient_option] ) ) {
$transient_timeout = '_transient_timeout_' . $transient;
$timeout = get_option( $transient_timeout );
if ( false !== $timeout && $timeout < time() ) {
delete_option( $transient_option );
delete_option( $transient_timeout );
$value = false;
}
}
}
if ( ! isset( $value ) )
$value = get_option( $transient_option );
}
/**
* Filter an existing transient's value.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 2.8.0
* @since 4.4.0 The `$transient` parameter was added
*
* @param mixed $value Value of transient.
* @param string $transient Transient name.
*/
return apply_filters( 'transient_' . $transient, $value, $transient );
}
/**
* Set/update the value of a transient.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is set.
*
* @since 2.8.0
*
* @param string $transient Transient name. Expected to not be SQL-escaped. Must be
* 172 characters or fewer in length.
* @param mixed $value Transient value. Must be serializable if non-scalar.
* Expected to not be SQL-escaped.
* @param int $expiration Optional. Time until expiration in seconds. Default 0 (no expiration).
* @return bool False if value was not set and true if value was set.
*/
function set_transient( $transient, $value, $expiration = 0 ) {
$expiration = (int) $expiration;
/**
* Filter a specific transient before its value is set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
* @since 4.2.0 The `$expiration` parameter was added.
* @since 4.4.0 The `$transient` parameter was added.
*
* @param mixed $value New value of transient.
* @param int $expiration Time until expiration in seconds.
* @param string $transient Transient name.
*/
$value = apply_filters( 'pre_set_transient_' . $transient, $value, $expiration, $transient );
/**
* Filter the expiration for a transient before its value is set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 4.4.0
*
* @param int $expiration Time until expiration in seconds. Use 0 for no expiration.
* @param mixed $value New value of transient.
* @param string $transient Transient name.
*/
$expiration = apply_filters( 'expiration_of_transient_' . $transient, $expiration, $value, $transient );
if ( wp_using_ext_object_cache() ) {
$result = wp_cache_set( $transient, $value, 'transient', $expiration );
} else {
$transient_timeout = '_transient_timeout_' . $transient;
$transient_option = '_transient_' . $transient;
if ( false === get_option( $transient_option ) ) {
$autoload = 'yes';
if ( $expiration ) {
$autoload = 'no';
add_option( $transient_timeout, time() + $expiration, '', 'no' );
}
$result = add_option( $transient_option, $value, '', $autoload );
} else {
// If expiration is requested, but the transient has no timeout option,
// delete, then re-create transient rather than update.
$update = true;
if ( $expiration ) {
if ( false === get_option( $transient_timeout ) ) {
delete_option( $transient_option );
add_option( $transient_timeout, time() + $expiration, '', 'no' );
$result = add_option( $transient_option, $value, '', 'no' );
$update = false;
} else {
update_option( $transient_timeout, time() + $expiration );
}
}
if ( $update ) {
$result = update_option( $transient_option, $value );
}
}
}
if ( $result ) {
/**
* Fires after the value for a specific transient has been set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
* @since 3.6.0 The `$value` and `$expiration` parameters were added.
* @since 4.4.0 The `$transient` parameter was added.
*
* @param mixed $value Transient value.
* @param int $expiration Time until expiration in seconds.
* @param string $transient The name of the transient.
*/
do_action( 'set_transient_' . $transient, $value, $expiration, $transient );
/**
* Fires after the value for a transient has been set.
*
* @since 3.0.0
* @since 3.6.0 The `$value` and `$expiration` parameters were added.
*
* @param string $transient The name of the transient.
* @param mixed $value Transient value.
* @param int $expiration Time until expiration in seconds.
*/
do_action( 'setted_transient', $transient, $value, $expiration );
}
return $result;
}
/**
* Saves and restores user interface settings stored in a cookie.
*
* Checks if the current user-settings cookie is updated and stores it. When no
* cookie exists (different browser used), adds the last saved cookie restoring
* the settings.
*
* @since 2.7.0
*/
function wp_user_settings() {
if ( ! is_admin() || defined( 'DOING_AJAX' ) ) {
return;
}
if ( ! $user_id = get_current_user_id() ) {
return;
}
if ( is_super_admin() && ! is_user_member_of_blog() ) {
return;
}
$settings = (string) get_user_option( 'user-settings', $user_id );
if ( isset( $_COOKIE['wp-settings-' . $user_id] ) ) {
$cookie = preg_replace( '/[^A-Za-z0-9=&_]/', '', $_COOKIE['wp-settings-' . $user_id] );
// No change or both empty
if ( $cookie == $settings )
return;
$last_saved = (int) get_user_option( 'user-settings-time', $user_id );
$current = isset( $_COOKIE['wp-settings-time-' . $user_id]) ? preg_replace( '/[^0-9]/', '', $_COOKIE['wp-settings-time-' . $user_id] ) : 0;
// The cookie is newer than the saved value. Update the user_option and leave the cookie as-is
if ( $current > $last_saved ) {
update_user_option( $user_id, 'user-settings', $cookie, false );
update_user_option( $user_id, 'user-settings-time', time() - 5, false );
return;
}
}
// The cookie is not set in the current browser or the saved value is newer.
$secure = ( 'https' === parse_url( admin_url(), PHP_URL_SCHEME ) );
setcookie( 'wp-settings-' . $user_id, $settings, time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
setcookie( 'wp-settings-time-' . $user_id, time(), time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
$_COOKIE['wp-settings-' . $user_id] = $settings;
}
/**
* Retrieve user interface setting value based on setting name.
*
* @since 2.7.0
*
* @param string $name The name of the setting.
* @param string $default Optional default value to return when $name is not set.
* @return mixed the last saved user setting or the default value/false if it doesn't exist.
*/
function get_user_setting( $name, $default = false ) {
$all_user_settings = get_all_user_settings();
return isset( $all_user_settings[$name] ) ? $all_user_settings[$name] : $default;
}
/**
* Add or update user interface setting.
*
* Both $name and $value can contain only ASCII letters, numbers and underscores.
* This function has to be used before any output has started as it calls setcookie().
*
* @since 2.8.0
*
* @param string $name The name of the setting.
* @param string $value The value for the setting.
* @return bool|void true if set successfully/false if not.
*/
function set_user_setting( $name, $value ) {
if ( headers_sent() ) {
return false;
}
$all_user_settings = get_all_user_settings();
$all_user_settings[$name] = $value;
return wp_set_all_user_settings( $all_user_settings );
}
/**
* Delete user interface settings.
*
* Deleting settings would reset them to the defaults.
* This function has to be used before any output has started as it calls setcookie().
*
* @since 2.7.0
*
* @param string $names The name or array of names of the setting to be deleted.
* @return bool|void true if deleted successfully/false if not.
*/
function delete_user_setting( $names ) {
if ( headers_sent() ) {
return false;
}
$all_user_settings = get_all_user_settings();
$names = (array) $names;
$deleted = false;
foreach ( $names as $name ) {
if ( isset( $all_user_settings[$name] ) ) {
unset( $all_user_settings[$name] );
$deleted = true;
}
}
if ( $deleted ) {
return wp_set_all_user_settings( $all_user_settings );
}
return false;
}
/**
* Retrieve all user interface settings.
*
* @since 2.7.0
*
* @global array $_updated_user_settings
*
* @return array the last saved user settings or empty array.
*/
function get_all_user_settings() {
global $_updated_user_settings;
if ( ! $user_id = get_current_user_id() ) {
return array();
}
if ( isset( $_updated_user_settings ) && is_array( $_updated_user_settings ) ) {
return $_updated_user_settings;
}
$user_settings = array();
if ( isset( $_COOKIE['wp-settings-' . $user_id] ) ) {
$cookie = preg_replace( '/[^A-Za-z0-9=&_-]/', '', $_COOKIE['wp-settings-' . $user_id] );
if ( strpos( $cookie, '=' ) ) { // '=' cannot be 1st char
parse_str( $cookie, $user_settings );
}
} else {
$option = get_user_option( 'user-settings', $user_id );
if ( $option && is_string( $option ) ) {
parse_str( $option, $user_settings );
}
}
$_updated_user_settings = $user_settings;
return $user_settings;
}
/**
* Private. Set all user interface settings.
*
* @since 2.8.0
*
* @global array $_updated_user_settings
*
* @param array $user_settings
* @return bool|void
*/
function wp_set_all_user_settings( $user_settings ) {
global $_updated_user_settings;
if ( ! $user_id = get_current_user_id() ) {
return false;
}
if ( is_super_admin() && ! is_user_member_of_blog() ) {
return;
}
$settings = '';
foreach ( $user_settings as $name => $value ) {
$_name = preg_replace( '/[^A-Za-z0-9_-]+/', '', $name );
$_value = preg_replace( '/[^A-Za-z0-9_-]+/', '', $value );
if ( ! empty( $_name ) ) {
$settings .= $_name . '=' . $_value . '&';
}
}
$settings = rtrim( $settings, '&' );
parse_str( $settings, $_updated_user_settings );
update_user_option( $user_id, 'user-settings', $settings, false );
update_user_option( $user_id, 'user-settings-time', time(), false );
return true;
}
/**
* Delete the user settings of the current user.
*
* @since 2.7.0
*/
function delete_all_user_settings() {
if ( ! $user_id = get_current_user_id() ) {
return;
}
update_user_option( $user_id, 'user-settings', '', false );
setcookie( 'wp-settings-' . $user_id, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
}
/**
* Retrieve an option value for the current network based on name of option.
*
* @since 2.8.0
* @since 4.4.0 The `$use_cache` parameter was deprecated.
* @since 4.4.0 Modified into wrapper for get_network_option()
*
* @see get_network_option()
*
* @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
* @param mixed $default Optional value to return if option doesn't exist. Default false.
* @param bool $deprecated Whether to use cache. Multisite only. Always set to true.
* @return mixed Value set for the option.
*/
function get_site_option( $option, $default = false, $deprecated = true ) {
return get_network_option( null, $option, $default );
}
/**
* Add a new option for the current network.
*
* Existing options will not be updated. Note that prior to 3.3 this wasn't the case.
*
* @since 2.8.0
* @since 4.4.0 Modified into wrapper for add_network_option()
*
* @see add_network_option()
*
* @param string $option Name of option to add. Expected to not be SQL-escaped.
* @param mixed $value Option value, can be anything. Expected to not be SQL-escaped.
* @return bool False if the option was not added. True if the option was added.
*/
function add_site_option( $option, $value ) {
return add_network_option( null, $option, $value );
}
/**
* Removes a option by name for the current network.
*
* @since 2.8.0
* @since 4.4.0 Modified into wrapper for delete_network_option()
*
* @see delete_network_option()
*
* @param string $option Name of option to remove. Expected to not be SQL-escaped.
* @return bool True, if succeed. False, if failure.
*/
function delete_site_option( $option ) {
return delete_network_option( null, $option );
}
/**
* Update the value of an option that was already added for the current network.
*
* @since 2.8.0
* @since 4.4.0 Modified into wrapper for update_network_option()
*
* @see update_network_option()
*
* @param string $option Name of option. Expected to not be SQL-escaped.
* @param mixed $value Option value. Expected to not be SQL-escaped.
* @return bool False if value was not updated. True if value was updated.
*/
function update_site_option( $option, $value ) {
return update_network_option( null, $option, $value );
}
/**
* Retrieve a network's option value based on the option name.
*
* @since 4.4.0
*
* @see get_option()
*
* @global wpdb $wpdb
* @global object $current_site
*
* @param int $network_id ID of the network. Can be null to default to the current network ID.
* @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
* @param mixed $default Optional. Value to return if the option doesn't exist. Default false.
* @return mixed Value set for the option.
*/
function get_network_option( $network_id, $option, $default = false ) {
global $wpdb, $current_site;
if ( $network_id && ! is_numeric( $network_id ) ) {
return false;
}
$network_id = (int) $network_id;
// Fallback to the current network if a network ID is not specified.
if ( ! $network_id && is_multisite() ) {
$network_id = $current_site->id;
}
/**
* Filter an existing network option before it is retrieved.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* Passing a truthy value to the filter will effectively short-circuit retrieval,
* returning the passed value instead.
*
* @since 2.9.0 As 'pre_site_option_' . $key
* @since 3.0.0
* @since 4.4.0 The `$option` parameter was added
*
* @param mixed $pre_option The default value to return if the option does not exist.
* @param string $option Option name.
*/
$pre = apply_filters( 'pre_site_option_' . $option, false, $option );
if ( false !== $pre ) {
return $pre;
}
// prevent non-existent options from triggering multiple queries
$notoptions_key = "$network_id:notoptions";
$notoptions = wp_cache_get( $notoptions_key, 'site-options' );
if ( isset( $notoptions[ $option ] ) ) {
/**
* Filter a specific default network option.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 3.4.0
* @since 4.4.0 The `$option` parameter was added.
*
* @param mixed $default The value to return if the site option does not exist
* in the database.
* @param string $option Option name.
*/
return apply_filters( 'default_site_option_' . $option, $default, $option );
}
if ( ! is_multisite() ) {
/** This filter is documented in wp-includes/option.php */
$default = apply_filters( 'default_site_option_' . $option, $default, $option );
$value = get_option( $option, $default );
} else {
$cache_key = "$network_id:$option";
$value = wp_cache_get( $cache_key, 'site-options' );
if ( ! isset( $value ) || false === $value ) {
$row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE meta_key = %s AND site_id = %d", $option, $network_id ) );
// Has to be get_row instead of get_var because of funkiness with 0, false, null values
if ( is_object( $row ) ) {
$value = $row->meta_value;
$value = maybe_unserialize( $value );
wp_cache_set( $cache_key, $value, 'site-options' );
} else {
if ( ! is_array( $notoptions ) ) {
$notoptions = array();
}
$notoptions[ $option ] = true;
wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
/** This filter is documented in wp-includes/option.php */
$value = apply_filters( 'default_site_option_' . $option, $default, $option );
}
}
}
/**
* Filter the value of an existing network option.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As 'site_option_' . $key
* @since 3.0.0
* @since 4.4.0 The `$option` parameter was added
*
* @param mixed $value Value of network option.
* @param string $option Option name.
*/
return apply_filters( 'site_option_' . $option, $value, $option );
}
/**
* Add a new network option.
*
* Existing options will not be updated.
*
* @since 4.4.0
*
* @see add_option()
*
* @global wpdb $wpdb
* @global object $current_site
*
* @param int $network_id ID of the network. Can be null to default to the current network ID.
* @param string $option Name of option to add. Expected to not be SQL-escaped.
* @param mixed $value Option value, can be anything. Expected to not be SQL-escaped.
* @return bool False if option was not added and true if option was added.
*/
function add_network_option( $network_id, $option, $value ) {
global $wpdb, $current_site;
if ( $network_id && ! is_numeric( $network_id ) ) {
return false;
}
$network_id = (int) $network_id;
// Fallback to the current network if a network ID is not specified.
if ( ! $network_id && is_multisite() ) {
$network_id = $current_site->id;
}
wp_protect_special_option( $option );
/**
* Filter the value of a specific network option before it is added.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As 'pre_add_site_option_' . $key
* @since 3.0.0
* @since 4.4.0 The `$option` parameter was added
*
* @param mixed $value Value of network option.
* @param string $option Option name.
*/
$value = apply_filters( 'pre_add_site_option_' . $option, $value, $option );
$notoptions_key = "$network_id:notoptions";
if ( ! is_multisite() ) {
$result = add_option( $option, $value );
} else {
$cache_key = "$network_id:$option";
// Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query
$notoptions = wp_cache_get( $notoptions_key, 'site-options' );
if ( ! is_array( $notoptions ) || ! isset( $notoptions[ $option ] ) ) {
if ( false !== get_network_option( $network_id, $option, false ) ) {
return false;
}
}
$value = sanitize_option( $option, $value );
$serialized_value = maybe_serialize( $value );
$result = $wpdb->insert( $wpdb->sitemeta, array( 'site_id' => $network_id, 'meta_key' => $option, 'meta_value' => $serialized_value ) );
if ( ! $result ) {
return false;
}
wp_cache_set( $cache_key, $value, 'site-options' );
// This option exists now
$notoptions = wp_cache_get( $notoptions_key, 'site-options' ); // yes, again... we need it to be fresh
if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
unset( $notoptions[ $option ] );
wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
}
}
if ( $result ) {
/**
* Fires after a specific network option has been successfully added.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As "add_site_option_{$key}"
* @since 3.0.0
*
* @param string $option Name of the network option.
* @param mixed $value Value of the network option.
*/
do_action( 'add_site_option_' . $option, $option, $value );
/**
* Fires after a network option has been successfully added.
*
* @since 3.0.0
*
* @param string $option Name of the network option.
* @param mixed $value Value of the network option.
*/
do_action( 'add_site_option', $option, $value );
return true;
}
return false;
}
/**
* Removes a network option by name.
*
* @since 4.4.0
*
* @see delete_option()
*
* @global wpdb $wpdb
* @global object $current_site
*
* @param int $network_id ID of the network. Can be null to default to the current network ID.
* @param string $option Name of option to remove. Expected to not be SQL-escaped.
* @return bool True, if succeed. False, if failure.
*/
function delete_network_option( $network_id, $option ) {
global $wpdb, $current_site;
if ( $network_id && ! is_numeric( $network_id ) ) {
return false;
}
$network_id = (int) $network_id;
// Fallback to the current network if a network ID is not specified.
if ( ! $network_id && is_multisite() ) {
$network_id = $current_site->id;
}
/**
* Fires immediately before a specific network option is deleted.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 3.0.0
* @since 4.4.0 The `$option` parameter was added
*
* @param string $option Option name.
*/
do_action( 'pre_delete_site_option_' . $option, $option );
if ( ! is_multisite() ) {
$result = delete_option( $option );
} else {
$row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $network_id ) );
if ( is_null( $row ) || ! $row->meta_id ) {
return false;
}
$cache_key = "$network_id:$option";
wp_cache_delete( $cache_key, 'site-options' );
$result = $wpdb->delete( $wpdb->sitemeta, array( 'meta_key' => $option, 'site_id' => $network_id ) );
}
if ( $result ) {
/**
* Fires after a specific network option has been deleted.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As "delete_site_option_{$key}"
* @since 3.0.0
*
* @param string $option Name of the network option.
*/
do_action( 'delete_site_option_' . $option, $option );
/**
* Fires after a network option has been deleted.
*
* @since 3.0.0
*
* @param string $option Name of the network option.
*/
do_action( 'delete_site_option', $option );
return true;
}
return false;
}
/**
* Update the value of a network option that was already added.
*
* @since 4.4.0
*
* @see update_option()
*
* @global wpdb $wpdb
* @global object $current_site
*
* @param int $network_id ID of the network. Can be null to default to the current network ID.
* @param string $option Name of option. Expected to not be SQL-escaped.
* @param mixed $value Option value. Expected to not be SQL-escaped.
* @return bool False if value was not updated and true if value was updated.
*/
function update_network_option( $network_id, $option, $value ) {
global $wpdb, $current_site;
if ( $network_id && ! is_numeric( $network_id ) ) {
return false;
}
$network_id = (int) $network_id;
// Fallback to the current network if a network ID is not specified.
if ( ! $network_id && is_multisite() ) {
$network_id = $current_site->id;
}
wp_protect_special_option( $option );
$old_value = get_network_option( $network_id, $option, false );
/**
* Filter a specific network option before its value is updated.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As 'pre_update_site_option_' . $key
* @since 3.0.0
* @since 4.4.0 The `$option` parameter was added
*
* @param mixed $value New value of the network option.
* @param mixed $old_value Old value of the network option.
* @param string $option Option name.
*/
$value = apply_filters( 'pre_update_site_option_' . $option, $value, $old_value, $option );
if ( $value === $old_value ) {
return false;
}
if ( false === $old_value ) {
return add_network_option( $network_id, $option, $value );
}
$notoptions_key = "$network_id:notoptions";
$notoptions = wp_cache_get( $notoptions_key, 'site-options' );
if ( is_array( $notoptions ) && isset( $notoptions[ $option ] ) ) {
unset( $notoptions[ $option ] );
wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
}
if ( ! is_multisite() ) {
$result = update_option( $option, $value );
} else {
$value = sanitize_option( $option, $value );
$serialized_value = maybe_serialize( $value );
$result = $wpdb->update( $wpdb->sitemeta, array( 'meta_value' => $serialized_value ), array( 'site_id' => $network_id, 'meta_key' => $option ) );
if ( $result ) {
$cache_key = "$network_id:$option";
wp_cache_set( $cache_key, $value, 'site-options' );
}
}
if ( $result ) {
/**
* Fires after the value of a specific network option has been successfully updated.
*
* The dynamic portion of the hook name, `$option`, refers to the option name.
*
* @since 2.9.0 As "update_site_option_{$key}"
* @since 3.0.0
*
* @param string $option Name of the network option.
* @param mixed $value Current value of the network option.
* @param mixed $old_value Old value of the network option.
*/
do_action( 'update_site_option_' . $option, $option, $value, $old_value );
/**
* Fires after the value of a network option has been successfully updated.
*
* @since 3.0.0
*
* @param string $option Name of the network option.
* @param mixed $value Current value of the network option.
* @param mixed $old_value Old value of the network option.
*/
do_action( 'update_site_option', $option, $value, $old_value );
return true;
}
return false;
}
/**
* Delete a site transient.
*
* @since 2.9.0
*
* @param string $transient Transient name. Expected to not be SQL-escaped.
* @return bool True if successful, false otherwise
*/
function delete_site_transient( $transient ) {
/**
* Fires immediately before a specific site transient is deleted.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
*
* @param string $transient Transient name.
*/
do_action( 'delete_site_transient_' . $transient, $transient );
if ( wp_using_ext_object_cache() ) {
$result = wp_cache_delete( $transient, 'site-transient' );
} else {
$option_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
$result = delete_site_option( $option );
if ( $result )
delete_site_option( $option_timeout );
}
if ( $result ) {
/**
* Fires after a transient is deleted.
*
* @since 3.0.0
*
* @param string $transient Deleted transient name.
*/
do_action( 'deleted_site_transient', $transient );
}
return $result;
}
/**
* Get the value of a site transient.
*
* If the transient does not exist, does not have a value, or has expired,
* then the return value will be false.
*
* @since 2.9.0
*
* @see get_transient()
*
* @param string $transient Transient name. Expected to not be SQL-escaped.
* @return mixed Value of transient.
*/
function get_site_transient( $transient ) {
/**
* Filter the value of an existing site transient.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* Passing a truthy value to the filter will effectively short-circuit retrieval,
* returning the passed value instead.
*
* @since 2.9.0
* @since 4.4.0 The `$transient` parameter was added.
*
* @param mixed $pre_site_transient The default value to return if the site transient does not exist.
* Any value other than false will short-circuit the retrieval
* of the transient, and return the returned value.
* @param string $transient Transient name.
*/
$pre = apply_filters( 'pre_site_transient_' . $transient, false, $transient );
if ( false !== $pre )
return $pre;
if ( wp_using_ext_object_cache() ) {
$value = wp_cache_get( $transient, 'site-transient' );
} else {
// Core transients that do not have a timeout. Listed here so querying timeouts can be avoided.
$no_timeout = array('update_core', 'update_plugins', 'update_themes');
$transient_option = '_site_transient_' . $transient;
if ( ! in_array( $transient, $no_timeout ) ) {
$transient_timeout = '_site_transient_timeout_' . $transient;
$timeout = get_site_option( $transient_timeout );
if ( false !== $timeout && $timeout < time() ) {
delete_site_option( $transient_option );
delete_site_option( $transient_timeout );
$value = false;
}
}
if ( ! isset( $value ) )
$value = get_site_option( $transient_option );
}
/**
* Filter the value of an existing site transient.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 2.9.0
* @since 4.4.0 The `$transient` parameter was added.
*
* @param mixed $value Value of site transient.
* @param string $transient Transient name.
*/
return apply_filters( 'site_transient_' . $transient, $value, $transient );
}
/**
* Set/update the value of a site transient.
*
* You do not need to serialize values, if the value needs to be serialize, then
* it will be serialized before it is set.
*
* @since 2.9.0
*
* @see set_transient()
*
* @param string $transient Transient name. Expected to not be SQL-escaped. Must be
* 40 characters or fewer in length.
* @param mixed $value Transient value. Expected to not be SQL-escaped.
* @param int $expiration Optional. Time until expiration in seconds. Default 0 (no expiration).
* @return bool False if value was not set and true if value was set.
*/
function set_site_transient( $transient, $value, $expiration = 0 ) {
/**
* Filter the value of a specific site transient before it is set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
* @since 4.4.0 The `$transient` parameter was added.
*
* @param mixed $value New value of site transient.
* @param string $transient Transient name.
*/
$value = apply_filters( 'pre_set_site_transient_' . $transient, $value, $transient );
$expiration = (int) $expiration;
/**
* Filter the expiration for a site transient before its value is set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 4.4.0
*
* @param int $expiration Time until expiration in seconds. Use 0 for no expiration.
* @param mixed $value New value of site transient.
* @param string $transient Transient name.
*/
$expiration = apply_filters( 'expiration_of_site_transient_' . $transient, $expiration, $value, $transient );
if ( wp_using_ext_object_cache() ) {
$result = wp_cache_set( $transient, $value, 'site-transient', $expiration );
} else {
$transient_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
if ( false === get_site_option( $option ) ) {
if ( $expiration )
add_site_option( $transient_timeout, time() + $expiration );
$result = add_site_option( $option, $value );
} else {
if ( $expiration )
update_site_option( $transient_timeout, time() + $expiration );
$result = update_site_option( $option, $value );
}
}
if ( $result ) {
/**
* Fires after the value for a specific site transient has been set.
*
* The dynamic portion of the hook name, `$transient`, refers to the transient name.
*
* @since 3.0.0
* @since 4.4.0 The `$transient` parameter was added
*
* @param mixed $value Site transient value.
* @param int $expiration Time until expiration in seconds.
* @param string $transient Transient name.
*/
do_action( 'set_site_transient_' . $transient, $value, $expiration, $transient );
/**
* Fires after the value for a site transient has been set.
*
* @since 3.0.0
*
* @param string $transient The name of the site transient.
* @param mixed $value Site transient value.
* @param int $expiration Time until expiration in seconds.
*/
do_action( 'setted_site_transient', $transient, $value, $expiration );
}
return $result;
}