'API_KEY', 'base' => 'BASE_ID', 'slack_webhook' => 'SLACK_WEBHOOK_URL' // Get the URL here: https://api.slack.com/incoming-webhooks )); $images_array = array( array( 'url' => 'IMAGE_URL' ) ); $update_contact_details = array( 'Image' => $images_array // test by changing the field name to something that doesn't exist ); $update_contact = $airtable->updateContent("Customers/{entry-id}",$update_contact_details); print_r($update_contact);