wp-email-templates

Use when adding or refactoring transactional emails in a WordPress plugin — extracting inline HTML strings into reusable templates sharing a branded base shell, implementing the render_template helper (ob_start / include / ob_get_clean), passing variables safely with extract(EXTR_SKIP), sending via wp_mail(), testing with MockPHPMailer / tests_retrieve_phpmailer_instance(), applying table-based HTML layout and inline CSS for email clients, or handling wp_mail send-failure branches. Triggers: "send an email from my plugin", "wp_mail not working", "add an email template", "style my plugin emails", "HTML email in WordPress", "branded email wrapper", "email not arriving", "test my wp_mail", "add a CTA button to the email", "make emails look good in Outlook", "transactional email template", "render_template helper", "ob_start for email", "extract EXTR_SKIP", "MockPHPMailer in tests", "tests_retrieve_phpmailer_instance", "pre_wp_mail filter to test failure", "inline CSS email", "dark mode email support", "table-based email layout", "wp_mail headers", "email not sending in tests". Not for: REST API webhooks, push notifications, or transactional email in themes.