Sanitizes various option values based on the nature of the option.
Description
This is basically a switch statement which will pass $value through a number of functions depending on the $option.
Parameters
$option
stringrequired- The name of the option.
$value
mixedrequired- The unsanitized value.
Source
function sanitize_option( $option, $value ) {
global $wpdb;
$original_value = $value;
$error = null;
switch ( $option ) {
case 'admin_email':
case 'new_admin_email':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
$value = sanitize_email( $value );
if ( ! is_email( $value ) ) {
$error = __( 'The email address entered did not appear to be a valid email address. Please enter a valid email address.' );
}
}
break;
case 'thumbnail_size_w':
case 'thumbnail_size_h':
case 'medium_size_w':
case 'medium_size_h':
case 'medium_large_size_w':
case 'medium_large_size_h':
case 'large_size_w':
case 'large_size_h':
case 'mailserver_port':
case 'comment_max_links':
case 'page_on_front':
case 'page_for_posts':
case 'rss_excerpt_length':
case 'default_category':
case 'default_email_category':
case 'default_link_category':
case 'close_comments_days_old':
case 'comments_per_page':
case 'thread_comments_depth':
case 'users_can_register':
case 'start_of_week':
case 'site_icon':
case 'fileupload_maxk':
$value = absint( $value );
break;
case 'posts_per_page':
case 'posts_per_rss':
$value = (int) $value;
if ( empty( $value ) ) {
$value = 1;
}
if ( $value < -1 ) {
$value = abs( $value );
}
break;
case 'default_ping_status':
case 'default_comment_status':
// Options that if not there have 0 value but need to be something like "closed".
if ( '0' === (string) $value || '' === $value ) {
$value = 'closed';
}
break;
case 'blogdescription':
case 'blogname':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( $value !== $original_value ) {
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', wp_encode_emoji( $original_value ) );
}
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
$value = esc_html( $value );
}
break;
case 'blog_charset':
if ( is_string( $value ) ) {
$value = preg_replace( '/[^a-zA-Z0-9_-]/', '', $value ); // Strips slashes.
} else {
$value = '';
}
break;
case 'blog_public':
// This is the value if the settings checkbox is not checked on POST. Don't rely on this.
if ( null === $value ) {
$value = 1;
} else {
$value = (int) $value;
}
break;
case 'date_format':
case 'time_format':
case 'mailserver_url':
case 'mailserver_login':
case 'mailserver_pass':
case 'upload_path':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
$value = strip_tags( $value );
$value = wp_kses_data( $value );
}
break;
case 'ping_sites':
$value = explode( "\n", $value );
$value = array_filter( array_map( 'trim', $value ) );
$value = array_filter( array_map( 'sanitize_url', $value ) );
$value = implode( "\n", $value );
break;
case 'gmt_offset':
if ( is_numeric( $value ) ) {
$value = preg_replace( '/[^0-9:.-]/', '', $value ); // Strips slashes.
} else {
$value = '';
}
break;
case 'siteurl':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
if ( preg_match( '#http(s?)://(.+)#i', $value ) ) {
$value = sanitize_url( $value );
} else {
$error = __( 'The WordPress address you entered did not appear to be a valid URL. Please enter a valid URL.' );
}
}
break;
case 'home':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
if ( preg_match( '#http(s?)://(.+)#i', $value ) ) {
$value = sanitize_url( $value );
} else {
$error = __( 'The Site address you entered did not appear to be a valid URL. Please enter a valid URL.' );
}
}
break;
case 'WPLANG':
$allowed = get_available_languages();
if ( ! is_multisite() && defined( 'WPLANG' ) && '' !== WPLANG && 'en_US' !== WPLANG ) {
$allowed[] = WPLANG;
}
if ( ! in_array( $value, $allowed, true ) && ! empty( $value ) ) {
$value = get_option( $option );
}
break;
case 'illegal_names':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
if ( ! is_array( $value ) ) {
$value = explode( ' ', $value );
}
$value = array_values( array_filter( array_map( 'trim', $value ) ) );
if ( ! $value ) {
$value = '';
}
}
break;
case 'limited_email_domains':
case 'banned_email_domains':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
if ( ! is_array( $value ) ) {
$value = explode( "\n", $value );
}
$domains = array_values( array_filter( array_map( 'trim', $value ) ) );
$value = array();
foreach ( $domains as $domain ) {
if ( ! preg_match( '/(--|\.\.)/', $domain ) && preg_match( '|^([a-zA-Z0-9-\.])+$|', $domain ) ) {
$value[] = $domain;
}
}
if ( ! $value ) {
$value = '';
}
}
break;
case 'timezone_string':
$allowed_zones = timezone_identifiers_list( DateTimeZone::ALL_WITH_BC );
if ( ! in_array( $value, $allowed_zones, true ) && ! empty( $value ) ) {
$error = __( 'The timezone you have entered is not valid. Please select a valid timezone.' );
}
break;
case 'permalink_structure':
case 'category_base':
case 'tag_base':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
$value = sanitize_url( $value );
$value = str_replace( 'http://', '', $value );
}
if ( 'permalink_structure' === $option && null === $error
&& '' !== $value && ! preg_match( '/%[^\/%]+%/', $value )
) {
$error = sprintf(
/* translators: %s: Documentation URL. */
__( 'A structure tag is required when using custom permalinks. <a href="%s">Learn more</a>' ),
__( 'https://wordpress.org/documentation/article/customize-permalinks/#choosing-your-permalink-structure' )
);
}
break;
case 'default_role':
if ( ! get_role( $value ) && get_role( 'subscriber' ) ) {
$value = 'subscriber';
}
break;
case 'moderation_keys':
case 'disallowed_keys':
$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
if ( is_wp_error( $value ) ) {
$error = $value->get_error_message();
} else {
$value = explode( "\n", $value );
$value = array_filter( array_map( 'trim', $value ) );
$value = array_unique( $value );
$value = implode( "\n", $value );
}
break;
}
if ( null !== $error ) {
if ( '' === $error && is_wp_error( $value ) ) {
/* translators: 1: Option name, 2: Error code. */
$error = sprintf( __( 'Could not sanitize the %1$s option. Error code: %2$s' ), $option, $value->get_error_code() );
}
$value = get_option( $option );
if ( function_exists( 'add_settings_error' ) ) {
add_settings_error( $option, "invalid_{$option}", $error );
}
}
/**
* Filters an option value following sanitization.
*
* @since 2.3.0
* @since 4.3.0 Added the `$original_value` parameter.
*
* @param mixed $value The sanitized option value.
* @param string $option The option name.
* @param mixed $original_value The original value passed to the function.
*/
return apply_filters( "sanitize_option_{$option}", $value, $option, $original_value );
}
Hooks
- apply_filters( “sanitize_option_{$option}”,
mixed $value ,string $option ,mixed $original_value ) Filters an option value following sanitization.
Changelog
Version | Description |
---|---|
2.0.5 | Introduced. |
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