<?php
/**
* Comment API: WP_Comment class
*
* @package WordPress
* @subpackage Comments
* @since 4.4.0
*/
/**
* Core class used to organize comments as instantiated objects with defined members.
*
* @since 4.4.0
*/
final class WP_Comment {
/**
* Comment ID.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
*/
public $comment_ID;
/**
* ID of the post the comment is associated with.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
*/
public $comment_post_ID = 0;
/**
* Comment author name.
*
* @since 4.4.0
* @var string
*/
public $comment_author = '';
/**
* Comment author email address.
*
* @since 4.4.0
* @var string
*/
public $comment_author_email = '';
/**
* Comment author URL.
*
* @since 4.4.0
* @var string
*/
public $comment_author_url = '';
/**
* Comment author IP address (IPv4 format).
*
* @since 4.4.0
* @var string
*/
public $comment_author_IP = '';
/**
* Comment date in YYYY-MM-DD HH:MM:SS format.
*
* @since 4.4.0
* @var string
*/
public $comment_date = '0000-00-00 00:00:00';
/**
* Comment GMT date in YYYY-MM-DD HH::MM:SS format.
*
* @since 4.4.0
* @var string
*/
public $comment_date_gmt = '0000-00-00 00:00:00';
/**
* Comment content.
*
* @since 4.4.0
* @var string
*/
public $comment_content;
/**
* Comment karma count.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
*/
public $comment_karma = 0;
/**
* Comment approval status.
*
* @since 4.4.0
* @var string
*/
public $comment_approved = '1';
/**
* Comment author HTTP user agent.
*
* @since 4.4.0
* @var string
*/
public $comment_agent = '';
/**
* Comment type.
*
* @since 4.4.0
* @since 5.5.0 Default value changed to `comment`.
* @var string
*/
public $comment_type = 'comment';
/**
* Parent comment ID.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
*/
public $comment_parent = 0;
/**
* Comment author ID.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
*/
public $user_id = 0;
/**
* Comment children.
*
* @since 4.4.0
* @var array
*/
protected $children;
/**
* Whether children have been populated for this comment object.
*
* @since 4.4.0
* @var bool
*/
protected $populated_children = false;
/**
* Post fields.
*
* @since 4.4.0
* @var array
*/
protected $post_fields = array( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_excerpt', 'post_status', 'comment_status', 'ping_status', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_content_filtered', 'post_parent', 'guid', 'menu_order', 'post_type', 'post_mime_type', 'comment_count' );
/**
* Retrieves a WP_Comment instance.
*
* @since 4.4.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int $id Comment ID.
* @return WP_Comment|false Comment object, otherwise false.
*/
public static function get_instance( $id ) {
global $wpdb;
$comment_id = (int) $id;
if ( ! $comment_id ) {
return false;
}
$_comment = wp_cache_get( $comment_id, 'comment' );
if ( ! $_comment ) {
$_comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment_id ) );
if ( ! $_comment ) {
return false;
}
wp_cache_add( $_comment->comment_ID, $_comment, 'comment' );
}
return new WP_Comment( $_comment );
}
/**
* Constructor.
*
* Populates properties with object vars.
*
* @since 4.4.0
*
* @param WP_Comment $comment Comment object.
*/
public function __construct( $comment ) {
foreach ( get_object_vars( $comment ) as $key => $value ) {
$this->$key = $value;
}
}
/**
* Convert object to array.
*
* @since 4.4.0
*
* @return array Object as array.
*/
public function to_array() {
return get_object_vars( $this );
}
/**
* Get the children of a comment.
*
* @since 4.4.0
*
* @param array $args {
* Array of arguments used to pass to get_comments() and determine format.
*
* @type string $format Return value format. 'tree' for a hierarchical tree, 'flat' for a flattened array.
* Default 'tree'.
* @type string $status Comment status to limit results by. Accepts 'hold' (`comment_status=0`),
* 'approve' (`comment_status=1`), 'all', or a custom comment status.
* Default 'all'.
* @type string $hierarchical Whether to include comment descendants in the results.
* 'threaded' returns a tree, with each comment's children
* stored in a `children` property on the `WP_Comment` object.
* 'flat' returns a flat array of found comments plus their children.
* Pass `false` to leave out descendants.
* The parameter is ignored (forced to `false`) when `$fields` is 'ids' or 'counts'.
* Accepts 'threaded', 'flat', or false. Default: 'threaded'.
* @type string|array $orderby Comment status or array of statuses. To use 'meta_value'
* or 'meta_value_num', `$meta_key` must also be defined.
* To sort by a specific `$meta_query` clause, use that
* clause's array key. Accepts 'comment_agent',
* 'comment_approved', 'comment_author',
* 'comment_author_email', 'comment_author_IP',
* 'comment_author_url', 'comment_content', 'comment_date',
* 'comment_date_gmt', 'comment_ID', 'comment_karma',
* 'comment_parent', 'comment_post_ID', 'comment_type',
* 'user_id', 'comment__in', 'meta_value', 'meta_value_num',
* the value of $meta_key, and the array keys of
* `$meta_query`. Also accepts false, an empty array, or
* 'none' to disable `ORDER BY` clause.
* }
* @return WP_Comment[] Array of `WP_Comment` objects.
*/
public function get_children( $args = array() ) {
$defaults = array(
'format' => 'tree',
'status' => 'all',
'hierarchical' => 'threaded',
'orderby' => '',
);
$_args = wp_parse_args( $args, $defaults );
$_args['parent'] = $this->comment_ID;
if ( is_null( $this->children ) ) {
if ( $this->populated_children ) {
$this->children = array();
} else {
$this->children = get_comments( $_args );
}
}
if ( 'flat' === $_args['format'] ) {
$children = array();
foreach ( $this->children as $child ) {
$child_args = $_args;
$child_args['format'] = 'flat';
// get_children() resets this value automatically.
unset( $child_args['parent'] );
$children = array_merge( $children, array( $child ), $child->get_children( $child_args ) );
}
} else {
$children = $this->children;
}
return $children;
}
/**
* Add a child to the comment.
*
* Used by `WP_Comment_Query` when bulk-filling descendants.
*
* @since 4.4.0
*
* @param WP_Comment $child Child comment.
*/
public function add_child( WP_Comment $child ) {
$this->children[ $child->comment_ID ] = $child;
}
/**
* Get a child comment by ID.
*
* @since 4.4.0
*
* @param int $child_id ID of the child.
* @return WP_Comment|false Returns the comment object if found, otherwise false.
*/
public function get_child( $child_id ) {
if ( isset( $this->children[ $child_id ] ) ) {
return $this->children[ $child_id ];
}
return false;
}
/**
* Set the 'populated_children' flag.
*
* This flag is important for ensuring that calling `get_children()` on a childless comment will not trigger
* unneeded database queries.
*
* @since 4.4.0
*
* @param bool $set Whether the comment's children have already been populated.
*/
public function populated_children( $set ) {
$this->populated_children = (bool) $set;
}
/**
* Check whether a non-public property is set.
*
* If `$name` matches a post field, the comment post will be loaded and the post's value checked.
*
* @since 4.4.0
*
* @param string $name Property name.
* @return bool
*/
public function __isset( $name ) {
if ( in_array( $name, $this->post_fields, true ) && 0 !== (int) $this->comment_post_ID ) {
$post = get_post( $this->comment_post_ID );
return property_exists( $post, $name );
}
}
/**
* Magic getter.
*
* If `$name` matches a post field, the comment post will be loaded and the post's value returned.
*
* @since 4.4.0
*
* @param string $name
* @return mixed
*/
public function __get( $name ) {
if ( in_array( $name, $this->post_fields, true ) ) {
$post = get_post( $this->comment_post_ID );
return $post->$name;
}
}
}