检索用户列表的信息以防止get_userdata()进行多次查询
原型
cache_users( array $user_ids )
参数
$user_ids
(array)
(Required)
用户ID号列表
源文件
路径:wp-includes/pluggable.php
<?php
...
function cache_users( $user_ids ) {
global $wpdb;
$clean = _get_non_cached_ids( $user_ids, 'users' );
if ( empty( $clean ) )
return;
$list = implode( ',', $clean );
$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
$ids = array();
foreach ( $users as $user ) {
update_user_caches( $user );
$ids[] = $user->ID;
}
update_meta_cache( 'user', $ids );
}
...
?>
其他
英文文档:https://developer.wordpress.org/reference/functions/cache_users/