How to Handle Telegram Bot API Rate Limits and 429 Errors in PHP

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Telegram's Bot API enforces strict rate limits, including roughly one message per second per chat and 30 messages per second globally per bot, returning HTTP 429 errors with a Retry-After value when limits are exceeded. A DEV Community tutorial outlines a PHP-based approach to correctly parse these 429 responses using cURL and extract the retry_after parameter from the JSON body. The guide introduces a per-chat outbound queue that serializes message sends and respects Telegram's authoritative Retry-After delay rather than using arbitrary backoff values. It also covers grouping message bursts to a single chat to stay within the one-message-per-second ceiling and flags common failure patterns during mass broadcasts. The pattern is designed as a drop-in solution for webhook handlers without relying on any specific PHP framework.

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