Generic Webhook Integration

Send form data to any external URL via POST request with configurable content type and authentication.

Action type: webhook Class: Core_Forms\Actions\Webhook Source: extensions/webhooks/src/Action.php

Setup

1. In WordPress, edit your form > Actions tab > Add Action > Trigger Webhook.
2. Enter the target URL.
3. Choose the content type (JSON or form-encoded).
4. Optionally configure authentication headers.

Settings Reference

Setting	Required	Default	Description
Webhook URL	Yes	—	The URL that receives the POST request
Content Type	No	form	json (application/json) or form (application/x-www-form-urlencoded)
Header Name	No	—	Authentication header name (e.g., Authorization, X-API-Key)
Header Value	No	—	Authentication header value (e.g., Bearer your-token)

Content Types

JSON (application/json)

Sends all form fields as a JSON object:

{
  "name": "Jane Smith",
  "email": "jane@example.com",
  "message": "Hello"
}

Form-encoded (application/x-www-form-urlencoded)

Sends all form fields as standard form data:

name=Jane+Smith&email=jane%40example.com&message=Hello

Authentication

The authentication header is optional. Common configurations:

Header Name	Header Value	Use Case
Authorization	Bearer your-api-token	Bearer token auth
Authorization	Basic base64string	HTTP Basic auth
X-API-Key	your-api-key	API key auth
X-Auth-Token	your-token	Custom token auth

Both header name and value must be provided for auth to be included. A Referer header with the site URL is always sent.

Filters

cf_webhook_request_args

Modify the request arguments before sending:

add_filter( 'cf_webhook_request_args', function( $args, $settings, $submission, $form ) {
    // Add a custom header
    $args['headers']['X-Form-ID'] = $form->ID;
    // Modify the body
    $body = json_decode( $args['body'], true );
    $body['source'] = 'website';
    $args['body'] = json_encode( $body );
    return $args;
}, 10, 4 );

cf_webhook_response

Act on the webhook response:

add_action( 'cf_webhook_response', function( $response, $settings, $submission, $form ) {
    if ( is_wp_error( $response ) ) {
        error_log( 'Webhook failed: ' . $response->get_error_message() );
    }
}, 10, 4 );

How It Works

1. Validates that the URL is not empty.
2. Builds request headers including Referer and optional auth header.
3. Encodes the body as JSON or form-encoded based on content type setting.
4. Applies the cf_webhook_request_args filter.
5. POSTs to the URL via wp_remote_post().
6. Fires the cf_webhook_response action with the response.
7. Returns true if no WP_Error occurred.

Example: Send to Custom API

• Webhook URL: https://api.example.com/submissions
• Content Type: json
• Header Name: Authorization
• Header Value: Bearer sk_live_abc123

Troubleshooting

• Request failing silently: Use the cf_webhook_response action to log errors.
• Authentication rejected: Ensure the header value includes the full prefix (e.g., Bearer with trailing space for Bearer tokens).
• Array fields: When using form-encoded content type, array values (checkboxes) are sent as PHP array notation. Use JSON for cleaner handling of arrays.