function spamCheck( $incoming_comment ) {
$pattern = '/[一-龥]/u';
if(!preg_match($pattern, $incoming_comment['comment_content'])) {
wp_die( 'You should type some Chinese word!' );
}
if(substr_count($incoming_comment['comment_content'],'http') > 3) {
wp_die( '請勿在您的評論中包含過多鏈接!' );
}
return( $incoming_comment );
}
add_filter('preprocess_comment', 'spamCheck');