Send new Wordpress posts to Slack

wp-slack.php

<?php

# based on https://gist.github.com/alexstone/9319715

function slack_post($post_id) {
	if( ( $_POST['post_status'] == 'publish' ) && ( $_POST['original_post_status'] != 'publish' ) ) {
		$room = "general"; // What Slack channel to send to
		$post = get_post($post_id);
		$author = get_userdata($post->post_author);
		$message = "New post '" . get_the_title($post_id) . "' by {$author->user_firstname} - " . get_permalink($post->ID);

		$data = "payload=" . json_encode(array(
			"channel"		=>  "#{$room}",
			"text"			=>  $message,
			"icon_emoji"		=>  ":globe_with_meridians:",
			"username"		=> "Wordpress"
		));
		$ch = curl_init("https://TEAM.slack.com/services/hooks/incoming-webhook?token=TOKEN"); // Put your Incoming WebHooks URL here
		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		ob_start(); // no output pls
		$result = curl_exec($ch);
		curl_close($ch);
		ob_end_clean();
	}
}

add_action( 'publish_post', 'slack_post' );