13. Webhook Filters | Form Forge - Build Forms with AI in Seconds

Filters for modifying webhook payloads before delivery to external services.

`formforge_webhook_payload`

Modify the webhook JSON payload before it is sent. Receives the payload, form object, submission data, and submission ID.

Add metadata and remove sensitive fields:

add_filter( 'formforge_webhook_payload', function( $payload, $form, $data, $submission_id ) {
    $payload['source'] = 'wordpress';
    $payload['environment'] = wp_get_environment_type();

    // Remove sensitive fields
    unset( $payload['fields']['field_ssn'] );
    unset( $payload['fields']['field_password'] );

    return $payload;
}, 10, 4 );

Flatten the nested field structure:

add_filter( 'formforge_webhook_payload', function( $payload, $form, $data, $submission_id ) {
    $flat = [];
    foreach ( $payload['fields'] as $id => $field ) {
        $flat[ $field['label'] ] = $field['value'];
    }
    $payload['flat_fields'] = $flat;
    return $payload;
}, 10, 4 );

Add HMAC authentication for secure webhook delivery:

add_filter( 'formforge_webhook_payload', function( $payload, $form, $data, $submission_id ) {
    $secret = get_option( 'my_webhook_secret', 'default-secret' );
    $payload['auth_token'] = hash_hmac( 'sha256', wp_json_encode( $payload ), $secret );
    $payload['timestamp']  = time();
    return $payload;
}, 10, 4 );

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