Code for checking and blocking LDAP users to reset password.

/**
 * Checks whether a user is LDAP user and restricts to reset password.
 *
 * @param  bool   $allow    Whether the password can be reset.
 * @param  int    $user_id  The ID of the user.
 * @return bool|WP_Error
 */
function ldap_restrict_password_reset( $allow, $user_id ) {

    $user = get_user_by( \'id\', $user_id );
    if ( ! empty( $user ) ) {
        $user_login   = stripslashes( $user->data->user_login );
        $user_email   = stripslashes( $user->data->user_email );

        // check if the user a LDAP user
        if( $user_email === \'[email protected]\' ) {
            return new WP_Error(\'no_password_reset\', __(\'Password reset is not allowed for this LDAP user on this site.\'));
        }
    }

    return $allow;
}
/* Filters whether the user\'s password can be reset. */
add_filter( \'allow_password_reset\', \'ldap_restrict_password_reset\', 10, 2 );

=========================================================

这些是一些可以用来停止发送电子邮件并显示错误消息的挂钩。

/**
 * Fires before a new password is retrieved.
 *
 * @since 1.5.1
 *
 * @param string $user_login The user login name.
 */
do_action( \'retrieve_password\', $user_login );

/**
 * Filter whether to allow a password to be reset.
 *
 * @since 2.7.0
 *
 * @param bool true           Whether to allow the password to be reset. Default true.
 * @param int  $user_data->ID The ID of the user attempting to reset a password.
 */
$allow = apply_filters( \'allow_password_reset\', true, $user_data->ID );

if ( ! $allow )
    return new WP_Error(\'no_password_reset\', __(\'Password reset is not allowed for this user\'));
else if ( is_wp_error($allow) )
    return $allow;