(PHP 8 >= 8.1.0)

Fiber::isRunningDetermines if the fiber is running


public Fiber::isRunning(): bool


This function has no parameters.

Return Values

Returns true only if the fiber is running. A fiber is considered running after a call to Fiber::start(), Fiber::resume(), or Fiber::throw() that has not yet returned. Return false if the fiber is not running.

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