process_property_value( $property, $value[ $property ] ); if ( 'font-family' === $property ) { $value['font-backup'] = ( isset( $value['font-backup'] ) ) ? $value['font-backup'] : ''; $property_value = $this->process_property_value( $property, array( $value['font-family'], $value['font-backup'], ) ); } $property_value = ( is_array( $property_value ) && isset( $property_value[0] ) ) ? $property_value[0] : $property_value; $this->styles[ $output['media_query'] ][ $output['element'] ][ $property ] = $output['prefix'] . $property_value . $output['suffix']; } } }