Walker_Comment
Core walker class used to create an HTML list of comments.
Description Description
See also See also
Source Source
File: wp-includes/class-walker-comment.php
class Walker_Comment extends Walker { /** * What the class handles. * * @since 2.7.0 * @var string * * @see Walker::$tree_type */ public $tree_type = 'comment'; /** * Database fields to use. * * @since 2.7.0 * @var array * * @see Walker::$db_fields * @todo Decouple this */ public $db_fields = array( 'parent' => 'comment_parent', 'id' => 'comment_ID', ); /** * Starts the list before the elements are added. * * @since 2.7.0 * * @see Walker::start_lvl() * @global int $comment_depth * * @param string $output Used to append additional content (passed by reference). * @param int $depth Optional. Depth of the current comment. Default 0. * @param array $args Optional. Uses 'style' argument for type of HTML list. Default empty array. */ public function start_lvl( &$output, $depth = 0, $args = array() ) { $GLOBALS['comment_depth'] = $depth + 1; switch ( $args['style'] ) { case 'div': break; case 'ol': $output .= '<ol class="children">' . "\n"; break; case 'ul': default: $output .= '<ul class="children">' . "\n"; break; } } /** * Ends the list of items after the elements are added. * * @since 2.7.0 * * @see Walker::end_lvl() * @global int $comment_depth * * @param string $output Used to append additional content (passed by reference). * @param int $depth Optional. Depth of the current comment. Default 0. * @param array $args Optional. Will only append content if style argument value is 'ol' or 'ul'. * Default empty array. */ public function end_lvl( &$output, $depth = 0, $args = array() ) { $GLOBALS['comment_depth'] = $depth + 1; switch ( $args['style'] ) { case 'div': break; case 'ol': $output .= "</ol><!-- .children -->\n"; break; case 'ul': default: $output .= "</ul><!-- .children -->\n"; break; } } /** * Traverses elements to create list from elements. * * This function is designed to enhance Walker::display_element() to * display children of higher nesting levels than selected inline on * the highest depth level displayed. This prevents them being orphaned * at the end of the comment list. * * Example: max_depth = 2, with 5 levels of nested content. * 1 * 1.1 * 1.1.1 * 1.1.1.1 * 1.1.1.1.1 * 1.1.2 * 1.1.2.1 * 2 * 2.2 * * @since 2.7.0 * * @see Walker::display_element() * @see wp_list_comments() * * @param WP_Comment $element Comment data object. * @param array $children_elements List of elements to continue traversing. Passed by reference. * @param int $max_depth Max depth to traverse. * @param int $depth Depth of the current element. * @param array $args An array of arguments. * @param string $output Used to append additional content. Passed by reference. */ public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) { if ( ! $element ) { return; } $id_field = $this->db_fields['id']; $id = $element->$id_field; parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output ); /* * If at the max depth, and the current element still has children, loop over those * and display them at this level. This is to prevent them being orphaned to the end * of the list. */ if ( $max_depth <= $depth + 1 && isset( $children_elements[ $id ] ) ) { foreach ( $children_elements[ $id ] as $child ) { $this->display_element( $child, $children_elements, $max_depth, $depth, $args, $output ); } unset( $children_elements[ $id ] ); } } /** * Starts the element output. * * @since 2.7.0 * * @see Walker::start_el() * @see wp_list_comments() * @global int $comment_depth * @global WP_Comment $comment Global comment object. * * @param string $output Used to append additional content. Passed by reference. * @param WP_Comment $comment Comment data object. * @param int $depth Optional. Depth of the current comment in reference to parents. Default 0. * @param array $args Optional. An array of arguments. Default empty array. * @param int $id Optional. ID of the current comment. Default 0 (unused). */ public function start_el( &$output, $comment, $depth = 0, $args = array(), $id = 0 ) { $depth++; $GLOBALS['comment_depth'] = $depth; $GLOBALS['comment'] = $comment; if ( ! empty( $args['callback'] ) ) { ob_start(); call_user_func( $args['callback'], $comment, $args, $depth ); $output .= ob_get_clean(); return; } if ( ( 'pingback' == $comment->comment_type || 'trackback' == $comment->comment_type ) && $args['short_ping'] ) { ob_start(); $this->ping( $comment, $depth, $args ); $output .= ob_get_clean(); } elseif ( 'html5' === $args['format'] ) { ob_start(); $this->html5_comment( $comment, $depth, $args ); $output .= ob_get_clean(); } else { ob_start(); $this->comment( $comment, $depth, $args ); $output .= ob_get_clean(); } } /** * Ends the element output, if needed. * * @since 2.7.0 * * @see Walker::end_el() * @see wp_list_comments() * * @param string $output Used to append additional content. Passed by reference. * @param WP_Comment $comment The current comment object. Default current comment. * @param int $depth Optional. Depth of the current comment. Default 0. * @param array $args Optional. An array of arguments. Default empty array. */ public function end_el( &$output, $comment, $depth = 0, $args = array() ) { if ( ! empty( $args['end-callback'] ) ) { ob_start(); call_user_func( $args['end-callback'], $comment, $args, $depth ); $output .= ob_get_clean(); return; } if ( 'div' == $args['style'] ) { $output .= "</div><!-- #comment-## -->\n"; } else { $output .= "</li><!-- #comment-## -->\n"; } } /** * Outputs a pingback comment. * * @since 3.6.0 * * @see wp_list_comments() * * @param WP_Comment $comment The comment object. * @param int $depth Depth of the current comment. * @param array $args An array of arguments. */ protected function ping( $comment, $depth, $args ) { $tag = ( 'div' == $args['style'] ) ? 'div' : 'li'; ?> <<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( '', $comment ); ?>> <div class="comment-body"> <?php _e( 'Pingback:' ); ?> <?php comment_author_link( $comment ); ?> <?php edit_comment_link( __( 'Edit' ), '<span class="edit-link">', '</span>' ); ?> </div> <?php } /** * Outputs a single comment. * * @since 3.6.0 * * @see wp_list_comments() * * @param WP_Comment $comment Comment to display. * @param int $depth Depth of the current comment. * @param array $args An array of arguments. */ protected function comment( $comment, $depth, $args ) { if ( 'div' == $args['style'] ) { $tag = 'div'; $add_below = 'comment'; } else { $tag = 'li'; $add_below = 'div-comment'; } $commenter = wp_get_current_commenter(); if ( $commenter['comment_author_email'] ) { $moderation_note = __( 'Your comment is awaiting moderation.' ); } else { $moderation_note = __( 'Your comment is awaiting moderation. This is a preview, your comment will be visible after it has been approved.' ); } ?> <<?php echo $tag; ?> <?php comment_class( $this->has_children ? 'parent' : '', $comment ); ?> id="comment-<?php comment_ID(); ?>"> <?php if ( 'div' != $args['style'] ) : ?> <div id="div-comment-<?php comment_ID(); ?>" class="comment-body"> <?php endif; ?> <div class="comment-author vcard"> <?php if ( 0 != $args['avatar_size'] ) { echo get_avatar( $comment, $args['avatar_size'] );} ?> <?php printf( /* translators: %s: Comment author link. */ __( '%s <span class="says">says:</span>' ), sprintf( '<cite class="fn">%s</cite>', get_comment_author_link( $comment ) ) ); ?> </div> <?php if ( '0' == $comment->comment_approved ) : ?> <em class="comment-awaiting-moderation"><?php echo $moderation_note; ?></em> <br /> <?php endif; ?> <div class="comment-meta commentmetadata"><a href="<?php echo esc_url( get_comment_link( $comment, $args ) ); ?>"> <?php /* translators: 1: Comment date, 2: Comment time. */ printf( __( '%1$s at %2$s' ), get_comment_date( '', $comment ), get_comment_time() ); ?> </a> <?php edit_comment_link( __( '(Edit)' ), ' ', '' ); ?> </div> <?php comment_text( $comment, array_merge( $args, array( 'add_below' => $add_below, 'depth' => $depth, 'max_depth' => $args['max_depth'], ) ) ); ?> <?php comment_reply_link( array_merge( $args, array( 'add_below' => $add_below, 'depth' => $depth, 'max_depth' => $args['max_depth'], 'before' => '<div class="reply">', 'after' => '</div>', ) ) ); ?> <?php if ( 'div' != $args['style'] ) : ?> </div> <?php endif; ?> <?php } /** * Outputs a comment in the HTML5 format. * * @since 3.6.0 * * @see wp_list_comments() * * @param WP_Comment $comment Comment to display. * @param int $depth Depth of the current comment. * @param array $args An array of arguments. */ protected function html5_comment( $comment, $depth, $args ) { $tag = ( 'div' === $args['style'] ) ? 'div' : 'li'; $commenter = wp_get_current_commenter(); if ( $commenter['comment_author_email'] ) { $moderation_note = __( 'Your comment is awaiting moderation.' ); } else { $moderation_note = __( 'Your comment is awaiting moderation. This is a preview, your comment will be visible after it has been approved.' ); } ?> <<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( $this->has_children ? 'parent' : '', $comment ); ?>> <article id="div-comment-<?php comment_ID(); ?>" class="comment-body"> <footer class="comment-meta"> <div class="comment-author vcard"> <?php if ( 0 != $args['avatar_size'] ) { echo get_avatar( $comment, $args['avatar_size'] ); } ?> <?php printf( /* translators: %s: Comment author link. */ __( '%s <span class="says">says:</span>' ), sprintf( '<b class="fn">%s</b>', get_comment_author_link( $comment ) ) ); ?> </div><!-- .comment-author --> <div class="comment-metadata"> <a href="<?php echo esc_url( get_comment_link( $comment, $args ) ); ?>"> <time datetime="<?php comment_time( 'c' ); ?>"> <?php /* translators: 1: Comment date, 2: Comment time. */ printf( __( '%1$s at %2$s' ), get_comment_date( '', $comment ), get_comment_time() ); ?> </time> </a> <?php edit_comment_link( __( 'Edit' ), '<span class="edit-link">', '</span>' ); ?> </div><!-- .comment-metadata --> <?php if ( '0' == $comment->comment_approved ) : ?> <em class="comment-awaiting-moderation"><?php echo $moderation_note; ?></em> <?php endif; ?> </footer><!-- .comment-meta --> <div class="comment-content"> <?php comment_text(); ?> </div><!-- .comment-content --> <?php comment_reply_link( array_merge( $args, array( 'add_below' => 'div-comment', 'depth' => $depth, 'max_depth' => $args['max_depth'], 'before' => '<div class="reply">', 'after' => '</div>', ) ) ); ?> </article><!-- .comment-body --> <?php } }
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Changelog Changelog
Version | Description |
---|---|
2.7.0 | Introduced. |
Methods Methods
- comment — Outputs a single comment.
- display_element — Traverses elements to create list from elements.
- end_el — Ends the element output, if needed.
- end_lvl — Ends the list of items after the elements are added.
- html5_comment — Outputs a comment in the HTML5 format.
- ping — Outputs a pingback comment.
- start_el — Starts the element output.
- start_lvl — Starts the list before the elements are added.
User Contributed Notes User Contributed Notes
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Use a custom walker to display comments list
And implement the class
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Feedback
Expanding on Justin’s answer above, the following needs to be defined in your theme’s functions php for the walker code to kick in:
— By Christian Saborio —