wp-includes/ms-site.php:524Normalizes data for a site prior to inserting or updating in the database.
$dataarrayarrayfunction wp_normalize_site_data( $data ) { // Sanitize domain if passed. if ( array_key_exists( 'domain', $data ) ) { $data['domain'] = preg_replace( '/[^a-z0-9\-.:]+/i', '', $data['domain'] ); } // Sanitize path if passed. if ( array_key_exists( 'path', $data ) ) { $data['path'] = trailingslashit( '/' . trim( $data['path'], '/' ) ); } // Sanitize network ID if passed. if ( array_key_exists( 'network_id', $data ) ) { $data['network_id'] = (int) $data['network_id']; } // Sanitize status fields if passed. $status_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted' ); foreach ( $status_fields as $status_field ) { if ( array_key_exists( $status_field, $data ) ) { $data[ $status_field ] = (int) $data[ $status_field ]; } } // Strip date fields if empty. $date_fields = array( 'registered', 'last_updated' ); foreach ( $date_fields as $date_field ) { if ( ! array_key_exists( $date_field, $data ) ) { continue; } if ( empty( $data[ $date_field ] ) || '0000-00-00 00:00:00' === $data[ $date_field ] ) { unset( $data[ $date_field ] ); } } return $data;}Introduced in 5.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-site.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.