Answer
Event loops manage asynchronous non-blocking operations for sockets, timers, and file I or O.
Quick Answer
Async PHP frameworks (Swoole, ReactPHP, Amp) use a single-threaded event loop. The loop monitors I/O events and runs callbacks when data is ready. Instead of blocking on a DB query, you register a callback and the loop handles other events meanwhile. This enables handling thousands of concurrent connections with one process. Familiar concept from Node.js but in PHP.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ