vsmash

Automated notifications from your WordPress site to your Slack / Mattermost application channels and webhooks.
There is no limit to the ways you may integrate this plugin.
It supports all other Vanilla Bean plugins and is available for under-the-hood use as well as shortcode access.
<h4>Key Features</h4>
<ul>
<li>Real-time WordPress notifications – Post status changes, comments, user registrations</li>
<li>WooCommerce integration – Sales notifications with order details</li>
<li>Plugin management alerts – Install, update, and deletion notifications</li>
<li>Multiple webhook support – Send to Slack, Mattermost, Discord, or custom endpoints</li>
<li>Formatted data messages – Rich attachments with structured name-value pairs (NEW in 5.5.2)</li>
<li>Smart queueing – Non-blocking message delivery with optional immediate sending</li>
<li>Email fallback – Send notifications via email when webhooks aren’t available</li>
<li>Shortcode support – Easy integration in posts and pages</li>
<li>Programmatic API – Full developer access with PHP functions</li>
</ul>
<h4>Shortcode Examples</h4>
<pre><code>[slackhooker text="Here is a message from my WordPress site"]
</code></pre>
or
<pre><code>[slackhooker text="Here is a message" channel="general" username="My WordPress"]
</code></pre>
or
<pre><code>[slackhooker text="Here is a message" channel="https://myorg.slack.com/services/xxoxlsodsfsfsdfds#channelname" username="My WordPress"]
</code></pre>
Messages are queued last in the PHP process to ensure your other page processing is not interrupted, but you can override:
<pre><code>[slackhooker text="Here is a message from my WordPress." sendnow="true"]
</code></pre>
Multiple or custom webhooks supported:
<pre><code>[slackhooker text="Here is a message to multiple webhooks" alsoto="https://hooks.slack.com/services/T03TDTbUF/BBG9SQV6X/abcdefghij,https://hooks.slack.com/services/T03TDTbUF/BBG9SQV6X/abcxxxxxxx"]
</code></pre>
<h4>Programmatic Examples</h4>
Simple text messages:
<pre><code>if(function_exists('\VanillaBeans\SlackHooker\vbean_slackhooker')){
 \VanillaBeans\SlackHooker\vbean_slackhooker('Here is my notification');
}

if(function_exists('\VanillaBeans\SlackHooker\vbean_slackhooker')){
 \VanillaBeans\SlackHooker\vbean_slackhooker('Here is my notification','mychannel','Username',':specific_icon:');
}

if(function_exists('\VanillaBeans\SlackHooker\vbean_slacknotify')){
 \VanillaBeans\SlackHooker\vbean_slacknotify(array('text'=>'Here is my notification','icon'=>':open_mouth:'));
}
</code></pre>
Formatted data messages (NEW in 5.5.2):
<pre><code>if(function_exists('\VanillaBeans\SlackHooker\vbean_send_data')){
 $data = array(
 'User ID' => '12345',
 'Email' => 'user@example.com',
 'Status' => 'Active',
 'Last Login' => '2025-10-03 14:30:00'
 );
 \VanillaBeans\SlackHooker\vbean_send_data('User Registration', $data);
}
</code></pre>
Custom formatted messages with options:
<pre><code>if(function_exists('\VanillaBeans\SlackHooker\vbean_send_data')){
 $data = array(
 'Order ID' => '#WC-12345',
 'Amount' => '$299.99',
 'Customer' => 'John Doe',
 'Payment Method' => 'Credit Card'
 );

 $options = array(
 'color' => '#00ff00',
 'pretext' => 'New WooCommerce Sale!',
 'text' => 'Payment processed successfully'
 );

 \VanillaBeans\SlackHooker\vbean_send_data('E-commerce Sale', $data, $options);
}
</code></pre>
Building custom attachment messages:
<pre><code>if(function_exists('\VanillaBeans\SlackHooker\vbean_build_data_message')){
 $message = \VanillaBeans\SlackHooker\vbean_build_data_message('System Alert', array(
 'Server' => 'web-01.example.com',
 'CPU Usage' => '85%',
 'Memory' => '3.2GB / 4GB',
 'Disk Space' => '75% full'
 ), array('color' => '#ff9900'));

 // Send using existing notification system
 Vanilla_Bean_Slack_Hooker::notification_send($message);
}
</code></pre>
<h4>Parameters</h4>
There are defaults for all except the message. You can specify:
<ul>
<li>text – required. This is your message</li>
<li>endpoints – override defaults with a comma separated list of endpoints with optional channel and alert eg: endpoints=’https://endpoint.com#channel#here’</li>
<li>channel – defaults to ‘general’ or your admin default specified channel – deprecated</li>
<li>username – the identity you would like displayed as the sender in the channel</li>
<li>icon – any of the available emoji icons in the slack system</li>
<li>sendnow – true or false. Defaults to false. True means that the message would be executed at the time it is called rather than at the end of page load.</li>
</ul>
New Data Message Parameters (5.5.2):
<ul>
<li>title – required for data messages. Main title of the message</li>
<li>data – associative array of name => value pairs to display</li>
<li>options – array of formatting options (color, pretext, text, author_name, etc.)</li>
</ul>
<h4>Use Cases</h4>
<ul>
<li>E-commerce monitoring – WooCommerce order notifications</li>
<li>User activity tracking – Registration and login alerts</li>
<li>System monitoring – Server status and health checks</li>
<li>Content management – Post publication and comment notifications</li>
<li>Security alerts – Failed login attempts and suspicious activity</li>
<li>Plugin management – Installation, update, and deletion notifications</li>
</ul>
<h4>Contact</h4>
We can be found at:
<ul>
<li>Website: <a href="http://www.velvary.com.au/contact-us" rel="nofollow ugc">Velvary Contact</a></li>
<li>Twitter: @VelvaryVanilla</li>
<li>Email: info@velvary.com.au or support@velvary.com.au</li>
</ul>

Vanilla Bean Slack Hooker

Well, I'm the dev so I'm giving it 5 stars, but I will keep trying to improve it.



Simple

Notify one or more Slack, Mattermost or other endpoints with configured webhooks for WordPress events. Notifications for plugin installs and updates,  …

rheinardkorf

Invitations for Slack lets you use convenient shortcodes to show “Join us on Slack.” buttons or Slack badges. Just add 
your Slack token and use the shortcodes wherever you want your visitors to be able to invite themselves from.
<h3>Features:</h3>
<ul>
<li>Easy to use:
<ul>
<li>Visit <a href="https://api.slack.com/web" rel="nofollow ugc">https://api.slack.com/web</a> to generate your Slack token.</li>
<li>Add the token to the plugin settings.</li>
<li>Use the [invitations_for_slack] or [invitations_for_slack_badge] shortcodes.</li>
</ul>
</li>
<li>Invitations are performed using the WP REST API which in turn communicates with the Slack API. No page reloads.</li>
</ul>
<h3>Requirements:</h3>
<ul>
<li>A Slack team and the team’s access token.</li>
<li>A self-hosted WordPress website (Not a WordPress.com website.)</li>
</ul>

Invitations for Slack

Plugin doesn't work unfortunately.

Have raised several issues in the support forum and still no response after months.

Doesn't work

Build a Slack community by allowing your visitors (or registered users) to invite themselves to your Slack team.

Vanilla Bean Slack Hooker vs Invitations for Slack