<?php 
function yg_oto_etiket_ekle($post_id, $post) {
$tags = explode(" ", preg_replace('/\s+/', ' ', $post->post_title));
wp_set_post_tags($post_id, $tags, true);
}
add_action('save_post', 'yg_oto_etiket_ekle', 10, 2);
?>