add_allowed_options( array   $new_options , string|array   $options  =  ”  ): array

Source

 function add_allowed_options( $new_options, $options = '' ) { if ( '' === $options ) { global $allowed_options; } else { $allowed_options = $options; } foreach ( $new_options as $page => $keys ) { foreach ( $keys as $key ) { if ( !  isset( $allowed_options[ $page ] ) || !  is_array( $allowed_options[ $page ] ) ) { $allowed_options[ $page ]   = array(); $allowed_options[ $page ][] = $key; } else { $pos = array_search( $key, $allowed_options[ $page ], true ); if ( false === $pos ) { $allowed_options[ $page ][] = $key; } } } } return $allowed_options; }

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