评论处理在文件：wp Comments post中完成。php。你可以用钩子pre_comment_on_post 验证在注释表单字段中输入的值。

function custom_validate_comment_url() {
    if( !empty( $_POST[\'url\'] ) && !preg_match( \'\\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]\', $_POST[\'url\'] ) // do you url validation here (I am not a regex expert)
        wp_die( __(\'Error: please enter a valid url or leave the homepage field empty\') );
}

add_action(\'pre_comment_on_post\', \'custom_validate_comment_url\');

function custom_change_comment_url( $commentdata ) {
    if( $commentdata[\'comment_author_url\'] == \'Your homepage\' )
        $commentdata[\'comment_author_url\'] = \'\';
    return $commentdata;
}

add_filter(\'preprocess_comment\', \'custom_change_comment_url\');