<?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.
*
* The `@property-read` fields below are not stored on the comment. They are proxied to the
* comment's post by {@see WP_Comment::__get()}, and are null when the comment is not attached
* to a post or when that post no longer exists.
*
* @since 4.4.0
*
* @property-read numeric-string|''|null $post_author
* @property-read string|null $post_date
* @property-read string|null $post_date_gmt
* @property-read string|null $post_content
* @property-read string|null $post_title
* @property-read string|null $post_excerpt
* @property-read non-empty-string|null $post_status
* @property-read non-empty-string|null $comment_status
* @property-read non-empty-string|null $ping_status
* @property-read string|null $post_name
* @property-read string|null $to_ping
* @property-read string|null $pinged
* @property-read string|null $post_modified
* @property-read string|null $post_modified_gmt
* @property-read string|null $post_content_filtered
* @property-read non-negative-int|null $post_parent
* @property-read string|null $guid
* @property-read int|null $menu_order
* @property-read non-empty-string|null $post_type
* @property-read string|null $post_mime_type
* @property-read numeric-string|null $comment_count
*
* @phpstan-type Data_Array array{
* comment_ID: numeric-string,
* comment_post_ID: numeric-string,
* comment_author: string,
* comment_author_email: string,
* comment_author_url: string,
* comment_author_IP: string,
* comment_date: non-empty-string,
* comment_date_gmt: non-empty-string,
* comment_content: string,
* comment_karma: numeric-string,
* comment_approved: non-empty-string,
* comment_agent: string,
* comment_type: string,
* comment_parent: numeric-string,
* user_id: numeric-string,
* ...
* }
*/
#[AllowDynamicProperties]
final class WP_Comment {
/**
* Comment ID.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
* @phpstan-var numeric-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
* @phpstan-var numeric-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
* @phpstan-var non-empty-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
* @phpstan-var non-empty-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
* @phpstan-var numeric-string
*/
public $comment_karma = '0';
/**
* Comment approval status.
*
* The values used in core are '0' (unapproved), '1' (approved), 'spam', 'trash',
* and 'post-trashed' (set for every comment on a post that is moved to the trash).
*
* @since 4.4.0
* @var string
* @phpstan-var non-empty-string
*/
public $comment_approved = '1';
/**
* Comment author HTTP user agent.
*
* @since 4.4.0
* @var string
*/
public $comment_agent = '';
/**
* Comment type.
*
* The values used in core are 'comment', 'pingback', 'trackback', and 'note'. Custom
* comment types are possible.
*
* Comments created before 5.5.0 may store an empty string rather than 'comment', so this
* cannot be relied upon to be non-empty. {@see get_comment_type()} normalizes that case
* when reading.
*
* @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
* @phpstan-var numeric-string
*/
public $comment_parent = '0';
/**
* Comment author ID.
*
* A numeric string, for compatibility reasons.
*
* @since 4.4.0
* @var string
* @phpstan-var numeric-string
*/
public $user_id = '0';
/**
* Comment children.
*
* Mapping of comment ID to WP_Comment object, as populated by the default
* `hierarchical => 'threaded'` argument of get_children(). Note that if a
* caller passes a `hierarchical` value of 'flat' or `false` to
* get_children(), a sequentially-keyed array of WP_Comment objects (also
* including all descendants, in the 'flat' case) is stored here instead.
*
* Null until populated by {@see WP_Comment::get_children()}.
*
* @since 4.4.0
* @var array<int, WP_Comment>|null
*/
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 string[]
* @phpstan-var list<non-empty-string>
*/
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.
* @phpstan-param int|numeric-string $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 ( ! is_object( $_comment ) ) {
/** @var object{ comment_ID: string, comment_post_ID: string, comment_author: string, comment_author_email: string, comment_author_url: string, comment_author_IP: string, comment_date: string, comment_date_gmt: string, comment_content: string, comment_karma: string, comment_approved: string, comment_agent: string, comment_type: string, comment_parent: string, user_id: string }|null $_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 object $comment Comment object.
*/
public function __construct( $comment ) {
foreach ( get_object_vars( $comment ) as $key => $value ) {
$this->$key = $value;
}
}
/**
* Converts object to array.
*
* @since 4.4.0
*
* @return array<string, mixed> Object as array.
* @phpstan-return Data_Array
*/
public function to_array(): array {
/** @var Data_Array $comment */
$comment = get_object_vars( $this );
return $comment;
}
/**
* Gets the children of a comment.
*
* @since 4.4.0
* @since 7.1.0 A `count` or `fields` query now returns its result directly rather than
* erroneously storing it in the comment's children cache.
*
* @param array $args {
* Array of arguments used to pass to {@see get_comments()} and determine format.
* Any other argument accepted by {@see WP_Comment_Query::__construct()} may also be passed, and is
* forwarded to `get_comments()`. Note that `parent` is always overridden with this comment's ID.
* A `$count` or `$fields` query returns the direct children only, and does not populate the
* comment's cached children, since that cache holds `WP_Comment` objects.
*
* @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.
* @type string $fields Which fields to return. Accepts 'ids' for comment IDs, or an
* empty string for full `WP_Comment` objects. Default empty.
* @type bool $count Whether to return a comment count rather than comments.
* Default false.
* @type string $type Limit results to comments of a given type, such as 'comment',
* 'pingback', 'trackback', or 'note'. Accepts 'all' for every
* type. Default empty.
* @type int $number Maximum number of comments to retrieve. Default empty (no limit).
* @type int $post_id Limit results to comments on a given post. Default 0.
* @type string $order How to order retrieved comments. Accepts 'ASC' or 'DESC'.
* Default 'DESC'.
* }
* @return WP_Comment[]|int[]|int Array of `WP_Comment` objects, an array of comment IDs when
* `$fields` is 'ids', or the number of children when `$count`
* is true.
*
* @phpstan-param array{
* format?: 'tree'|'flat',
* status?: 'hold'|'approve'|'all'|string,
* hierarchical?: 'threaded'|'flat'|false,
* orderby?: string|string[]|false,
* fields?: 'ids'|'',
* count?: bool,
* type?: string,
* number?: int,
* post_id?: int,
* order?: 'ASC'|'DESC',
* ...
* } $args
* @phpstan-return (
* $args is array{ count: true, ... } ? non-negative-int : (
* $args is array{ fields: 'ids', ... } ? non-negative-int[] : (
* $args is array{ format: 'flat', ... } ? list<WP_Comment> : array<int, WP_Comment>
* )
* )
* )
*/
public function get_children( $args = array() ) {
$defaults = array(
'format' => 'tree',
'status' => 'all',
'hierarchical' => 'threaded',
'orderby' => '',
);
/** @var array{ format: 'tree'|'flat', status: string, hierarchical: 'threaded'|'flat'|false, orderby: string|string[]|false, fields?: 'ids'|'', count?: bool, type?: string, number?: int, post_id?: int, order?: 'ASC'|'DESC', ... } $_args */
$_args = wp_parse_args( $args, $defaults );
$_args['parent'] = $this->comment_ID;
/*
* A 'count' or 'ids' query returns an integer or a list of comment IDs rather than
* WP_Comment objects. Neither may be written to the children cache, which holds
* WP_Comment objects and is read back by add_child(), get_child(), and the 'flat'
* format below. Return the result directly and leave the cache untouched. The two
* branches must stay separate: each is narrowed independently, and `count` is only
* safe to overwrite in the 'ids' branch.
*/
if ( ! empty( $_args['count'] ) ) {
return get_comments( $_args );
} elseif ( isset( $_args['fields'] ) && 'ids' === $_args['fields'] ) {
$_args['count'] = false; // For static analysis of the conditional return type.
return get_comments( $_args );
}
// Only WP_Comment objects are returned past this point. Stated positively for static analysis.
$_args['count'] = false;
$_args['fields'] = '';
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;
}
/**
* Adds 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 ): void {
$this->children[ (int) $child->comment_ID ] = $child;
}
/**
* Gets 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 ) {
return $this->children[ $child_id ] ?? false;
}
/**
* Sets 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 ): void {
$this->populated_children = (bool) $set;
}
/**
* Determines whether a non-public property is set.
*
* If `$name` matches a post field, the comment post will be loaded and the post's value checked.
*
* @since 4.4.0
* @since 7.1.0 Returns false instead of causing a fatal error when the comment's post cannot be found.
*
* @param string $name Property to check if set.
* @return bool Whether the property is set.
*/
public function __isset( $name ) {
if ( in_array( $name, $this->post_fields, true ) && 0 !== (int) $this->comment_post_ID ) {
$post = get_post( (int) $this->comment_post_ID );
return $post && property_exists( $post, $name );
}
return false;
}
/**
* Magic getter.
*
* If `$name` matches a post field, the comment post will be loaded and the post's value returned.
*
* @since 4.4.0
* @since 7.1.0 Returns null instead of the global post's field when the comment is not attached to
* a post, and no longer raises a warning when the comment's post cannot be found.
*
* @param string $name Property name.
* @return mixed
*/
public function __get( $name ) {
if ( in_array( $name, $this->post_fields, true ) && 0 !== (int) $this->comment_post_ID ) {
$post = get_post( (int) $this->comment_post_ID );
if ( ! $post ) {
return null;
}
return $post->$name;
}
return null;
}
}