add_action('after_setup_theme','remove_parent_widgets');

function remove_parent_widgets() {
remove_filter('get_the_excerpt', 'appointment_post_slider_excerpt');
}


add_filter('get_the_excerpt', 'appointment_post_slider_excerpt1');

function appointment_post_slider_excerpt1($output) {
    $output = strip_tags(preg_replace(" (\[.*?\])", '', $output));
    $output = strip_shortcodes($output);
    $original_len = strlen($output);
    $output = substr($output, 0, 1000);
    $len = strlen($output);
    if ($original_len > 1000) {
        $output = $output;
        return '<div class="slide-text-bg2">' . '<span>' . $output . '</span>' . '</div>' .
                '<div class="slide-btn-area-sm"><a href="' . esc_url(get_permalink()) . '" class="slide-btn-sm">'
                . esc_html__("Read More", "appointment") . '</a></div>';
    } else {
        return '<div class="slide-text-bg2">' . '<span>' . $output . '</span>' . '</div>';
    }
}