UTM Phone Switcher

Show a campaign-specific phone number on a WordPress site by matching URL parameters. The plugin updates matching phone text and tel: links in the visitor's browser; it does not send campaign data to a third-party service.

Live demo and plugin page · Download the 1.0.4 WordPress.org review package

Features

• Match any URL query parameter, including exact names and wildcard patterns such as utm_*.
• Match a parameter's presence or require an exact value.
• Target phone text with CSS selectors and update matching tel: links.
• Apply ordered rules to multiple contact points.
• Optionally remember matched rule IDs in a first-party cookie so the campaign number continues across pages.
• Connect campaign memory to the WordPress Consent API or a custom JavaScript consent state and change event. When consent is denied or withdrawn, the plugin clears and stops using the campaign cookie. The site owner chooses the consent category; the plugin does not classify cookies or certify legal compliance.
• Test enabled rules on the public site as a logged-in administrator before showing them to visitors.
• No call-tracking account or third-party service is required.

Screenshots

Campaign rules in the WordPress settings

Campaign-specific phone numbers in the live demo

Campaign memory and consent settings

Requirements

• WordPress 6.3 or later
• PHP 7.4 or later
• Checked with WordPress 7.1.3

Installation

1. Download the ZIP from the v1.0.4 release.
2. In WordPress, open Plugins → Add Plugin → Upload Plugin, choose the ZIP, and activate it.
3. Open Settings → UTM Phone Switcher and add a rule with a URL parameter, optional value, CSS selector, and replacement number.
4. Test a matching campaign URL, for example https://example.com/contact/?utm_source=newsletter.

Developer

Roman Klymenko is a senior web developer with 15+ years in commercial development and 400+ delivered or optimized websites and platforms. His work focuses on high-performance WordPress, custom business systems, large catalogs, marketplaces, trading tools, automation, technical SEO, and integrations. He is also a published technical author, with production experience in JavaScript, Python/FastAPI, Node.js automation, Asterisk, parsers, bots, and performance engineering.

Custom website and WordPress plugin development is available at $30/hour. See NeedToMe or the developer profile.

Support continued plugin development via DonationAlerts or Patreon.

License

GPL-2.0-or-later. See LICENSE.