wp_kses_hook example

function wp_kses( $content, $allowed_html, $allowed_protocols = array() ) {
    if ( empty( $allowed_protocols ) ) {
        $allowed_protocols = wp_allowed_protocols();
    }

    $content = wp_kses_no_null( $content, array( 'slash_zero' => 'keep' ) );
    $content = wp_kses_normalize_entities( $content );
    $content = wp_kses_hook( $content, $allowed_html, $allowed_protocols );

    return wp_kses_split( $content, $allowed_html, $allowed_protocols );
}

/** * Filters one HTML attribute and ensures its value is allowed. * * This function can escape data in some situations where `wp_kses()` must strip the whole attribute. * * @since 4.2.3 * * @param string $attr The 'whole' attribute, including name and value. * @param string $element The HTML element name to which the attribute belongs. * @return string Filtered attribute. */