<?php
$pagelist = get_pages("child_of=".$post->post_parent."&parent=".$post->post_parent."&sort_column=menu_order&sort_order=asc");
$pages = array();
foreach ($pagelist as $page) {
   $pages[] += $page->ID; 
}
$current = array_search($post->ID, $pages);
$prevID = $pages[$current-1];
$nextID = $pages[$current+1];

if (!empty($prevID) || !empty($nextID)) { ?>
<div class="navigation-wrapper">
    <div class="navigation">
        <?php if (!empty($prevID)) { ?>
        <div class="cell cell-previous">
            <a href="<?php echo get_permalink($prevID); ?>" title="<?php echo get_the_title($prevID); ?>">
                Précédent<br>
                <strong><?php echo get_the_title($prevID); ?></strong>
            </a>
        </div>
        <?php } ?>
        <?php if (!empty($nextID)) { ?>
        <div class="cell cell-next">
            <a href="<?php echo get_permalink($nextID); ?>" title="<?php echo get_the_title($nextID); ?>">
                Suivant<br>
                <strong><?php echo get_the_title($nextID); ?></strong>
            </a>
        </div>
        <?php } ?>
    </div>
</div>

//functions.php
function customimage_shortcode( $atts, $content = null ) {
    extract( shortcode_atts( array(
        'url'    => '',
        'text'   => '',
    ), $atts ) );
    $imgurl = $url ? $url : $imgurl;
    $content = $text ? $text : $content;
    if ( $url ) {
        foreach ( $link_attr as $key => $val ) {
            if ( $val ) {
                $link_attrs_str .= ' ' . $key . '="' . $val . '"';
            }
        }
        return '<figure class="customimage"><img src="' . $imgurl . '"/><figcaption>' . do_shortcode( $content ) . '</figcaption></figure>';
        
    }
}
add_shortcode( 'customimage', 'customimage_shortcode' );
function register_customimage( $buttons ) {
   array_push( $buttons, "", "customimage" );
   return $buttons;
}
function add_plugin_customimage( $plugin_array ) {
    $plugin_array['customimage'] = get_template_directory_uri() . '/js/customimage.js';
   return $plugin_array;
}
function my_customimage_shortcode() {
   if ( ! current_user_can('edit_posts') && ! current_user_can('edit_pages') ) {
      return;
   }
   if ( get_user_option('rich_editing') == 'true' ) {
      add_filter( 'mce_external_plugins', 'add_plugin_customimage' );
      add_filter( 'mce_buttons', 'register_customimage' );
   }
}
add_action('init', 'my_customimage_shortcode');

// customimage.js
(function() {
   tinymce.create('tinymce.plugins.customimage', {
      init : function(ed, url) {
         ed.addButton('customimage', {
            title : 'Custom Image',
            image : url+'/customimage.svg',
            onclick : function() {
                var title = prompt("Text", "Call to Action");
                var target = prompt("Target", "_blank");
                ed.execCommand('mceInsertContent', false, '[customimage url="'+href+'" text="'+title+'"]');
            }
         });
      },
      createControl : function(n, cm) {
         return null;
      },
      getInfo : function() {
         return {
            longname : "Custom Image",
            author : 'Otowui.com',
            authorurl : 'https://www.otowui.com',
            version : "1.0"
         };
      }
   });
   tinymce.PluginManager.add('customimage', tinymce.plugins.customimage);
})();

// unregister all widgets
function unregister_default_widgets() {
    unregister_widget('WP_Widget_Pages');
    unregister_widget('WP_Widget_Calendar');
    unregister_widget('WP_Widget_Archives');
    unregister_widget('WP_Widget_Links');
    unregister_widget('WP_Widget_Meta');
    unregister_widget('WP_Widget_Search');
    unregister_widget('WP_Widget_Text');
    unregister_widget('WP_Widget_Categories');
    unregister_widget('WP_Widget_Recent_Posts');
    unregister_widget('WP_Widget_Recent_Comments');
    unregister_widget('WP_Widget_RSS');
    unregister_widget('WP_Widget_Tag_Cloud');
    unregister_widget('WP_Nav_Menu_Widget');
    unregister_widget('Twenty_Eleven_Ephemera_Widget');
    unregister_widget('WP_Widget_Media_Audio');
    unregister_widget('WP_Widget_Media_Image');
    unregister_widget('WP_Widget_Media_Video');
    //unregister_widget('WP_Widget_Custom_HTML');
}
add_action('widgets_init', 'unregister_default_widgets', 11);

// REORDER MENU
add_filter('custom_menu_order', function() { return true; });
add_filter('menu_order', 'my_new_admin_menu_order');
function my_new_admin_menu_order( $menu_order ) {
  $new_positions = array('index.php' => 1, 'edit.php' => 2, 'upload.php' => 7, 'edit.php?post_type=page' => 3, 'edit-comments.php' => 8);
  function move_element(&$array, $a, $b) {
    $out = array_splice($array, $a, 1);
    array_splice($array, $b, 0, $out);
  }
  foreach( $new_positions as $value => $new_index ) {
    if( $current_index = array_search( $value, $menu_order ) ) {
      move_element($menu_order, $current_index, $new_index);
    }
  }
  return $menu_order;
}

$terms = get_the_terms( $post->ID , 'yourtaxonomyhere' ); 
foreach ( $terms as $term ) {
    $term_link = get_term_link( $term, 'yourtaxonomyhere' );
    if( is_wp_error( $term_link ) )
    continue;
echo '<a href="' . $term_link . '">' . $term->name . '</a>';
}

// Remove custom post types from search result
add_action('pre_get_posts', 'remove_cpts_from_search_results');
function remove_cpts_from_search_results($query) {
    if (is_admin() || !$query->is_main_query() || !$query->is_search()) {
        return $query;
    }
    $post_types_to_exclude = array('custom-post-type-1', 'custom-post-type-2');
    if ($query->get('post_type')) {
        $query_post_types = $query->get('post_type');
        if (is_string($query_post_types)) {
            $query_post_types = explode(',', $query_post_types);
        }
    } else {
        $query_post_types = get_post_types(array('exclude_from_search' => false));
    }
    if (sizeof(array_intersect($query_post_types, $post_types_to_exclude))) {
        $query->set('post_type', array_diff($query_post_types, $post_types_to_exclude));
    }
    return $query;
}

add_filter( 'pre_get_posts', 'cpt_archive_query' );
function cpt_archive_query( $query ) {
    if( $query->is_main_query() && $query->is_post_type_archive('cpt_name') ) {
        $query->set( 'posts_per_page', 24 );
        $query->set( 'orderby', 'name' );
        $query->set( 'order', 'asc' );
    }
}

add_filter('the_posts', 'show_future_posts');
function show_future_posts($posts){
    global $wp_query, $wpdb;
    if(is_single() && $wp_query->post_count == 0){
        $posts = $wpdb->get_results($wp_query->request);
    }
    return $posts;
}

function yoolk_copyright() {
    global $wpdb;
    $copyright_dates = $wpdb->get_results("SELECT YEAR(min(post_date_gmt)) AS firstdate, YEAR(max(post_date_gmt)) AS lastdate FROM $wpdb->posts WHERE post_status = 'publish'");
    $output = '';
    if($copyright_dates) {
        $copyright = "© " . $copyright_dates[0]->firstdate;
        if($copyright_dates[0]->firstdate != $copyright_dates[0]->lastdate) {
            $copyright .= '-' . $copyright_dates[0]->lastdate;
        }
        $output = $copyright.' - Website made by Yoolk';
    }
    return $output;
}

<?php /* Show thumbnails in WordPress Posts Pagination */ ?>
<?php if( $prev_post = get_previous_post() ): ?>
    <div class="nav-box previous">
        <?php $prevthumbnail = get_the_post_thumbnail($prev_post->ID, 'thumbnail' );?>
        <?php previous_post_link('%link',"$prevthumbnail  <p>%title</p>", TRUE); ?>
    </div>
<?php endif; ?>
<?php if( $next_post = get_next_post() ): ?>
    <div class="nav-box next">
        <?php $nextthumbnail = get_the_post_thumbnail($next_post->ID, 'thumbnail' );  ?>
        <?php next_post_link('%link',"$nextthumbnail  <p>%title</p>", TRUE); ?>
    </div>
<?php endif; ?>