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<?php
/**
* Author Template functions for use in themes.
*
* These functions must be used within the WordPress Loop.
*
* @link https://codex.wordpress.org/Author_Templates
*
* @package WordPress
* @subpackage Template
*/
/**
* Retrieves the author of the current post.
*
* @since 1.5.0
* @since 6.3.0 Returns an empty string if the author's display name is unknown.
*
* @global WP_User $authordata The current author's data.
*
* @param string $deprecated Deprecated.
* @return string The author's display name, empty string if unknown.
*/
function get_the_author( $deprecated = '' ) {
global $authordata;
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.1.0' );
}
/**
* Filters the display name of the current post's author.
*
* @since 2.9.0
*
* @param string $display_name The author's display name.
*/
return apply_filters( 'the_author', is_object( $authordata ) ? $authordata->display_name : '' );
}
/**
* Displays the name of the author of the current post.
*
* The behavior of this function is based off of old functionality predating
* get_the_author(). This function is not deprecated, but is designed to echo
* the value from get_the_author() and as an result of any old theme that might
* still use the old behavior will also pass the value from get_the_author().
*
* The normal, expected behavior of this function is to echo the author and not
* return it. However, backward compatibility has to be maintained.
*
* @since 0.71
*
* @see get_the_author()
* @link https://developer.wordpress.org/reference/functions/the_author/
*
* @param string $deprecated Deprecated.
* @param bool $deprecated_echo Deprecated. Use get_the_author(). Echo the string or return it.
* @return string The author's display name, from get_the_author().
*/
function the_author( $deprecated = '', $deprecated_echo = true ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.1.0' );
}
if ( true !== $deprecated_echo ) {
_deprecated_argument(
__FUNCTION__,
'1.5.0',
sprintf(
/* translators: %s: get_the_author() */
__( 'Use %s instead if you do not want the value echoed.' ),
'<code>get_the_author()</code>'
)
);
}
if ( $deprecated_echo ) {
echo get_the_author();
}
return get_the_author();
}
/**
* Retrieves the author who last edited the current post.
*
* @since 2.8.0
*
* @return string|void The author's display name, empty string if unknown.
*/
function get_the_modified_author() {
$last_id = get_post_meta( get_post()->ID, '_edit_last', true );
if ( $last_id ) {
$last_user = get_userdata( $last_id );
/**
* Filters the display name of the author who last edited the current post.
*
* @since 2.8.0
*
* @param string $display_name The author's display name, empty string if unknown.
*/
return apply_filters( 'the_modified_author', $last_user ? $last_user->display_name : '' );
}
}
/**
* Displays the name of the author who last edited the current post,
* if the author's ID is available.
*
* @since 2.8.0
*
* @see get_the_author()
*/
function the_modified_author() {
echo get_the_modified_author();
}
/**
* Retrieves the requested data of the author of the current post.
*
* Valid values for the `$field` parameter include:
*
* - admin_color
* - aim
* - comment_shortcuts
* - description
* - display_name
* - first_name
* - ID
* - jabber
* - last_name
* - nickname
* - plugins_last_view
* - plugins_per_page
* - rich_editing
* - syntax_highlighting
* - user_activation_key
* - user_description
* - user_email
* - user_firstname
* - user_lastname
* - user_level
* - user_login
* - user_nicename
* - user_pass
* - user_registered
* - user_status
* - user_url
* - yim
*
* @since 2.8.0
*
* @global WP_User $authordata The current author's data.
*
* @param string $field Optional. The user field to retrieve. Default empty.
* @param int|false $user_id Optional. User ID. Defaults to the current post author.
* @return string The author's field from the current author's DB object, otherwise an empty string.
*/
function get_the_author_meta( $field = '', $user_id = false ) {
$original_user_id = $user_id;
if ( ! $user_id ) {
global $authordata;
$user_id = isset( $authordata->ID ) ? $authordata->ID : 0;
} else {
$authordata = get_userdata( $user_id );
}
if ( in_array( $field, array( 'login', 'pass', 'nicename', 'email', 'url', 'registered', 'activation_key', 'status' ), true ) ) {
$field = 'user_' . $field;
}
$value = isset( $authordata->$field ) ? $authordata->$field : '';
/**
* Filters the value of the requested user metadata.
*
* The filter name is dynamic and depends on the $field parameter of the function.
*
* @since 2.8.0
* @since 4.3.0 The `$original_user_id` parameter was added.
*
* @param string $value The value of the metadata.
* @param int $user_id The user ID for the value.
* @param int|false $original_user_id The original user ID, as passed to the function.
*/
return apply_filters( "get_the_author_{$field}", $value, $user_id, $original_user_id );
}
/**
* Outputs the field from the user's DB object. Defaults to current post's author.
*
* @since 2.8.0
*
* @param string $field Selects the field of the users record. See get_the_author_meta()
* for the list of possible fields.
* @param int|false $user_id Optional. User ID. Defaults to the current post author.
*
* @see get_the_author_meta()
*/
function the_author_meta( $field = '', $user_id = false ) {
$author_meta = get_the_author_meta( $field, $user_id );
/**
* Filters the value of the requested user metadata.
*
* The filter name is dynamic and depends on the $field parameter of the function.
*
* @since 2.8.0
*
* @param string $author_meta The value of the metadata.
* @param int|false $user_id The user ID.
*/
echo apply_filters( "the_author_{$field}", $author_meta, $user_id );
}
/**
* Retrieves either author's link or author's name.
*
* If the author has a home page set, return an HTML link, otherwise just return
* the author's name.
*
* @since 3.0.0
*
* @global WP_User $authordata The current author's data.
*
* @return string An HTML link if the author's URL exists in user meta,
* otherwise the result of get_the_author().
*/
function get_the_author_link() {
if ( get_the_author_meta( 'url' ) ) {
global $authordata;
$author_url = get_the_author_meta( 'url' );
$author_display_name = get_the_author();
$link = sprintf(
'<a href="%1$s" title="%2$s" rel="author external">%3$s</a>',
esc_url( $author_url ),
/* translators: %s: Author's display name. */
esc_attr( sprintf( __( 'Visit %s’s website' ), $author_display_name ) ),
$author_display_name
);
/**
* Filters the author URL link HTML.
*
* @since 6.0.0
*
* @param string $link The default rendered author HTML link.
* @param string $author_url Author's URL.
* @param WP_User $authordata Author user data.
*/
return apply_filters( 'the_author_link', $link, $author_url, $authordata );
} else {
return get_the_author();
}
}
/**
* Displays either author's link or author's name.
*
* If the author has a home page set, echo an HTML link, otherwise just echo the
* author's name.
*
* @link https://developer.wordpress.org/reference/functions/the_author_link/
*
* @since 2.1.0
*/
function the_author_link() {
echo get_the_author_link();
}
/**
* Retrieves the number of posts by the author of the current post.
*
* @since 1.5.0
*
* @return int The number of posts by the author.
*/
function get_the_author_posts() {
$post = get_post();
if ( ! $post ) {
return 0;
}
return count_user_posts( $post->post_author, $post->post_type );
}
/**
* Displays the number of posts by the author of the current post.
*
* @link https://developer.wordpress.org/reference/functions/the_author_posts/
* @since 0.71
*/
function the_author_posts() {
echo get_the_author_posts();
}
/**
* Retrieves an HTML link to the author page of the current post's author.
*
* Returns an HTML-formatted link using get_author_posts_url().
*
* @since 4.4.0
*
* @global WP_User $authordata The current author's data.
*
* @return string An HTML link to the author page, or an empty string if $authordata is not set.
*/
function get_the_author_posts_link() {
global $authordata;
if ( ! is_object( $authordata ) ) {
return '';
}
$link = sprintf(
'<a href="%1$s" title="%2$s" rel="author">%3$s</a>',
esc_url( get_author_posts_url( $authordata->ID, $authordata->user_nicename ) ),
/* translators: %s: Author's display name. */
esc_attr( sprintf( __( 'Posts by %s' ), get_the_author() ) ),
get_the_author()
);
/**
* Filters the link to the author page of the author of the current post.
*
* @since 2.9.0
*
* @param string $link HTML link.
*/
return apply_filters( 'the_author_posts_link', $link );
}
/**
* Displays an HTML link to the author page of the current post's author.
*
* @since 1.2.0
* @since 4.4.0 Converted into a wrapper for get_the_author_posts_link()
*
* @param string $deprecated Unused.
*/
function the_author_posts_link( $deprecated = '' ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.1.0' );
}
echo get_the_author_posts_link();
}
/**
* Retrieves the URL to the author page for the user with the ID provided.
*
* @since 2.1.0
*
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @param int $author_id Author ID.
* @param string $author_nicename Optional. The author's nicename (slug). Default empty.
* @return string The URL to the author's page.
*/
function get_author_posts_url( $author_id, $author_nicename = '' ) {
global $wp_rewrite;
$author_id = (int) $author_id;
$link = $wp_rewrite->get_author_permastruct();
if ( empty( $link ) ) {
$file = home_url( '/' );
$link = $file . '?author=' . $author_id;
} else {
if ( '' === $author_nicename ) {
$user = get_userdata( $author_id );
if ( ! empty( $user->user_nicename ) ) {
$author_nicename = $user->user_nicename;
}
}
$link = str_replace( '%author%', $author_nicename, $link );
$link = home_url( user_trailingslashit( $link ) );
}
/**
* Filters the URL to the author's page.
*
* @since 2.1.0
*
* @param string $link The URL to the author's page.
* @param int $author_id The author's ID.
* @param string $author_nicename The author's nice name.
*/
$link = apply_filters( 'author_link', $link, $author_id, $author_nicename );
return $link;
}
/**
* Lists all the authors of the site, with several options available.
*
* @link https://developer.wordpress.org/reference/functions/wp_list_authors/
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string|array $args {
* Optional. Array or string of default arguments.
*
* @type string $orderby How to sort the authors. Accepts 'nicename', 'email', 'url', 'registered',
* 'user_nicename', 'user_email', 'user_url', 'user_registered', 'name',
* 'display_name', 'post_count', 'ID', 'meta_value', 'user_login'. Default 'name'.
* @type string $order Sorting direction for $orderby. Accepts 'ASC', 'DESC'. Default 'ASC'.
* @type int $number Maximum authors to return or display. Default empty (all authors).
* @type bool $optioncount Show the count in parenthesis next to the author's name. Default false.
* @type bool $exclude_admin Whether to exclude the 'admin' account, if it exists. Default true.
* @type bool $show_fullname Whether to show the author's full name. Default false.
* @type bool $hide_empty Whether to hide any authors with no posts. Default true.
* @type string $feed If not empty, show a link to the author's feed and use this text as the alt
* parameter of the link. Default empty.
* @type string $feed_image If not empty, show a link to the author's feed and use this image URL as
* clickable anchor. Default empty.
* @type string $feed_type The feed type to link to. Possible values include 'rss2', 'atom'.
* Default is the value of get_default_feed().
* @type bool $echo Whether to output the result or instead return it. Default true.
* @type string $style If 'list', each author is wrapped in an `<li>` element, otherwise the authors
* will be separated by commas.
* @type bool $html Whether to list the items in HTML form or plaintext. Default true.
* @type int[]|string $exclude Array or comma/space-separated list of author IDs to exclude. Default empty.
* @type int[]|string $include Array or comma/space-separated list of author IDs to include. Default empty.
* }
* @return void|string Void if 'echo' argument is true, list of authors if 'echo' is false.
*/
function wp_list_authors( $args = '' ) {
global $wpdb;
$defaults = array(
'orderby' => 'name',
'order' => 'ASC',
'number' => '',
'optioncount' => false,
'exclude_admin' => true,
'show_fullname' => false,
'hide_empty' => true,
'feed' => '',
'feed_image' => '',
'feed_type' => '',
'echo' => true,
'style' => 'list',
'html' => true,
'exclude' => '',
'include' => '',
);
$parsed_args = wp_parse_args( $args, $defaults );
$return = '';
$query_args = wp_array_slice_assoc( $parsed_args, array( 'orderby', 'order', 'number', 'exclude', 'include' ) );
$query_args['fields'] = 'ids';
/**
* Filters the query arguments for the list of all authors of the site.
*
* @since 6.1.0
*
* @param array $query_args The query arguments for get_users().
* @param array $parsed_args The arguments passed to wp_list_authors() combined with the defaults.
*/
$query_args = apply_filters( 'wp_list_authors_args', $query_args, $parsed_args );
$authors = get_users( $query_args );
$post_counts = array();
/**
* Filters whether to short-circuit performing the query for author post counts.
*
* @since 6.1.0
*
* @param int[]|false $post_counts Array of post counts, keyed by author ID.
* @param array $parsed_args The arguments passed to wp_list_authors() combined with the defaults.
*/
$post_counts = apply_filters( 'pre_wp_list_authors_post_counts_query', false, $parsed_args );
if ( ! is_array( $post_counts ) ) {
$post_counts = array();
$post_counts_query = $wpdb->get_results(
"SELECT DISTINCT post_author, COUNT(ID) AS count
FROM $wpdb->posts
WHERE " . get_private_posts_cap_sql( 'post' ) . '
GROUP BY post_author'
);
foreach ( (array) $post_counts_query as $row ) {
$post_counts[ $row->post_author ] = $row->count;
}
}
foreach ( $authors as $author_id ) {
$posts = isset( $post_counts[ $author_id ] ) ? $post_counts[ $author_id ] : 0;
if ( ! $posts && $parsed_args['hide_empty'] ) {
continue;
}
$author = get_userdata( $author_id );
if ( $parsed_args['exclude_admin'] && 'admin' === $author->display_name ) {
continue;
}
if ( $parsed_args['show_fullname'] && $author->first_name && $author->last_name ) {
$name = sprintf(
/* translators: 1: User's first name, 2: Last name. */
_x( '%1$s %2$s', 'Display name based on first name and last name' ),
$author->first_name,
$author->last_name
);
} else {
$name = $author->display_name;
}
if ( ! $parsed_args['html'] ) {
$return .= $name . ', ';
continue; // No need to go further to process HTML.
}
if ( 'list' === $parsed_args['style'] ) {
$return .= '<li>';
}
$link = sprintf(
'<a href="%1$s" title="%2$s">%3$s</a>',
esc_url( get_author_posts_url( $author->ID, $author->user_nicename ) ),
/* translators: %s: Author's display name. */
esc_attr( sprintf( __( 'Posts by %s' ), $author->display_name ) ),
$name
);
if ( ! empty( $parsed_args['feed_image'] ) || ! empty( $parsed_args['feed'] ) ) {
$link .= ' ';
if ( empty( $parsed_args['feed_image'] ) ) {
$link .= '(';
}
$link .= '<a href="' . get_author_feed_link( $author->ID, $parsed_args['feed_type'] ) . '"';
$alt = '';
if ( ! empty( $parsed_args['feed'] ) ) {
$alt = ' alt="' . esc_attr( $parsed_args['feed'] ) . '"';
$name = $parsed_args['feed'];
}
$link .= '>';
if ( ! empty( $parsed_args['feed_image'] ) ) {
$link .= '<img src="' . esc_url( $parsed_args['feed_image'] ) . '" style="border: none;"' . $alt . ' />';
} else {
$link .= $name;
}
$link .= '</a>';
if ( empty( $parsed_args['feed_image'] ) ) {
$link .= ')';
}
}
if ( $parsed_args['optioncount'] ) {
$link .= ' (' . $posts . ')';
}
$return .= $link;
$return .= ( 'list' === $parsed_args['style'] ) ? '</li>' : ', ';
}
$return = rtrim( $return, ', ' );
if ( $parsed_args['echo'] ) {
echo $return;
} else {
return $return;
}
}
/**
* Determines whether this site has more than one author.
*
* Checks to see if more than one author has published posts.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 3.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @return bool Whether or not we have more than one author
*/
function is_multi_author() {
global $wpdb;
$is_multi_author = get_transient( 'is_multi_author' );
if ( false === $is_multi_author ) {
$rows = (array) $wpdb->get_col( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 2" );
$is_multi_author = 1 < count( $rows ) ? 1 : 0;
set_transient( 'is_multi_author', $is_multi_author );
}
/**
* Filters whether the site has more than one author with published posts.
*
* @since 3.2.0
*
* @param bool $is_multi_author Whether $is_multi_author should evaluate as true.
*/
return apply_filters( 'is_multi_author', (bool) $is_multi_author );
}
/**
* Helper function to clear the cache for number of authors.
*
* @since 3.2.0
* @access private
*/
function __clear_multi_author_cache() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore
delete_transient( 'is_multi_author' );
}