该站点的原始开发人员使用了reset\\u password\\u消息过滤器，要么操作错误，要么核心代码已更改。以下功能现在起作用：

function reset_password_message( $message, $key ) {

    if ( strpos($_POST[\'user_login\'], \'@\') ) {
        $user_data = get_user_by(\'email\', trim($_POST[\'user_login\']));
    } else {
        $login = trim($_POST[\'user_login\']);
        $user_data = get_user_by(\'login\', $login);
    }

    $user_login = $user_data->user_login;

    $msg = __(\'The password for the following account has been requested to be reset:\'). "\\r\\n\\r\\n";
    $msg .= network_site_url() . "\\r\\n\\r\\n";
    $msg .= sprintf(__(\'Username: %s\'), $user_login) . "\\r\\n\\r\\n";
    $msg .= __(\'If this message was sent in error, please ignore this email.\') . "\\r\\n\\r\\n";
    $msg .= __(\'To reset your password, visit the following address:\');
    $msg .= \'<\' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), \'login\') . ">\\r\\n";

    return $msg;

}

add_filter(\'retrieve_password_message\', reset_password_message, null, 2);