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Description

Retrieve info for user lists to prevent multiple queries by get_userdata()

Usage

cache_users( $user_ids );

Parameters

$user_ids

( array ) required – User ID numbers list

Returns

void

Source

File name: wordpress/wp-includes/pluggable.php
Lines:

  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 );
  }
 

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