A Single Code Line Silently Blocked Free Trials for Guest Users on WooCommerce Site

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A fitness membership website built on WooCommerce Subscriptions was failing to display its 7-day free trial offer to logged-out visitors, who were instead charged the full price immediately at checkout. Logged-in users consistently saw and received the trial, making authentication status the central clue in the investigation. Initial suspicions pointed to caching layers — including page, reverse-proxy, and object caches — but thorough testing confirmed the issue was occurring in live, freshly generated PHP responses. Systematic elimination ruled out product misconfigurations, dynamic pricing plugins, a subscription enhancer plugin, and custom theme or snippet code as potential causes. The investigation ultimately traced the problem to a deliberate line of application logic that quietly suppressed trial visibility and eligibility for guest users, breaking the site's conversion funnel.

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ProgrammingDEV Community ·

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