Online PHP editor | output for qlXCj

@ 2020-11-02T17:19:07Z

<?php

function coroutine1() {
	for ($i = 1; $i <= 5; $i++) {
		echo "coroutine1: {$i}\n";
		yield;
	}
}

function coroutine2() {
	for ($i = 1; $i <= 10; $i++) {
		echo "coroutine2: {$i}\n";

		$loop = yield;
		if ($i == 3) {
			echo "coroutine2 spawning coroutine3\n";
			$loop->enqueue("#3", coroutine3());
		}
	}
}

function coroutine3() {
	for ($i = 1; $i <= 5; $i++) {
		echo "coroutine3: {$i}\n";
		yield;
	}
}

class EventLoop {
	private $tasks = [];

	public function enqueue($key, Generator $task) {
		$this->tasks[$key] = $task;
	}

	public function run() {
		foreach ($this->tasks as $key => $task) {
			$task->send($this);
			if (!$task->valid()) {
				echo "task {$key} complete\n";
				unset($this->tasks[$key]);
			}
		}

		return !empty($this->tasks);
	}
}

$loop = new EventLoop();
$loop->enqueue("#1", coroutine1());
$loop->enqueue("#2", coroutine2());

while ($loop->run());

Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: coroutine1: 1 coroutine1: 2 coroutine2: 1 coroutine2: 2 coroutine1: 3 coroutine2: 3 coroutine1: 4 coroutine2 spawning coroutine3 coroutine2: 4 coroutine1: 5 coroutine2: 5 coroutine3: 1 coroutine3: 2 task #1 complete coroutine2: 6 coroutine3: 3 coroutine2: 7 coroutine3: 4 coroutine2: 8 coroutine3: 5 coroutine2: 9 task #3 complete coroutine2: 10 task #2 complete
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 coroutine1: 1 coroutine1: 2 coroutine2: 1 coroutine2: 2 coroutine1: 3 coroutine2: 3 coroutine1: 4 coroutine2 spawning coroutine3 coroutine2: 4 coroutine1: 5 coroutine2: 5 coroutine3: 1 coroutine3: 2 task #1 complete coroutine2: 6 coroutine3: 3 coroutine2: 7 coroutine3: 4 coroutine2: 8 coroutine3: 5 coroutine2: 9 task #3 complete coroutine2: 10 task #2 complete

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