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For PHP applications Redis has been a must for storing sessions, especially when distributing load between multiple servers. It is also used to collect data for

For PHP applications Redis has been a must for storing sessions, especially when distributing load between multiple servers. It is also used to collect data for Prometheus exporters, for example, for languages that don't share memory between requests.

NightlyDev 7y ago
It's definitely not a must when using multiple PHP servers, but it sure is common and useful.