wordpress action snipped for posting facebook page when published any post.

wordpress_publish_action_posting_facebook.php

function post_facebook($post_ID){
	
	$thumbnail = wp_get_attachment_image_src ( get_post_thumbnail_id ( $post_ID ));
	$thumbnail = $thumbnail[0];
	
	$permalink = get_permalink($post_ID);
	
	$title = get_the_title($post_ID);
	
	$ch = curl_init("https://graph.facebook.com/{FACEBOOK_PAGE_ID}/feed");
	$params = array(
		"access_token"=>"{FACEBOOK_PAGES_ACCESS_TOKEN}",
		"message" => "[update] ".$title,
		"link" => $permalink,
		"picture" => $thumbnail,
		"name" => $title,
		"caption" => "{CAPTION}",
	);
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	curl_setopt($ch,CURLOPT_POST,true);
	curl_setopt($ch, CURLOPT_POSTFIELDS, $params );
	
	$data = curl_exec($ch);
	$info = curl_getinfo($ch);
	
	curl_close($ch);
	
	return $post_ID;
}
add_action('publish_post','post_facebook');