/**
* Retrieve user info by email.
*
* @since 2.5
*
* @param string $email User's email address
* @return bool|object False on failure, User DB row object
*/
function get_user_by_email($email)
{
global $wpdb;
$user_id = wp_cache_get($email, 'useremail');
$user = false;
if (false !== $user_id) {
$user = wp_cache_get($user_id, 'users');
}
if (false !== $user) {
promote_if_site_admin($user);
return $user;
}
if (!($user = $wpdb->get_row($wpdb->prepare("SELECT * FROM {$wpdb->users} WHERE user_email = %s", $email)))) {
return false;
}
_fill_user($user);
return $user;
}
function _fill_user(&$user)
{
global $wpdb;
$show = $wpdb->hide_errors();
$metavalues = $wpdb->get_results($wpdb->prepare("SELECT meta_key, meta_value FROM {$wpdb->usermeta} WHERE user_id = %d", $user->ID));
$wpdb->show_errors($show);
if ($metavalues) {
foreach ($metavalues as $meta) {
$value = maybe_unserialize($meta->meta_value);
$user->{$meta->meta_key} = $value;
}
}
$level = $wpdb->prefix . 'user_level';
if (isset($user->{$level})) {
$user->user_level = $user->{$level};
}
// For backwards compat.
if (isset($user->first_name)) {
$user->user_firstname = $user->first_name;
}
if (isset($user->last_name)) {
$user->user_lastname = $user->last_name;
}
if (isset($user->description)) {
$user->user_description = $user->description;
}
promote_if_site_admin($user);
wp_cache_add($user->ID, $user, 'users');
wp_cache_add($user->user_login, $user->ID, 'userlogins');
wp_cache_add($user->user_email, $user->ID, 'useremail');
}