Online PHP editor | output for YrDZ0

@ 2025-06-03T17:00:13Z

<?php
$fiber = new Fiber(function() {
    $count = 3;
    echo "Start\n";
    while(true) {
        Fiber::suspend(); // suspend the fiber
        echo "Are there results?\n";
        $count--;
        if ($count === 0) {
            return; // We received the results, we stop
        }
    }
});

$fiber->start(); // Initiates processing
do {
    echo "Do something else\n";
    $fiber->resume(); // Restart the fiber
} while (!$fiber->isTerminated()); // The fiber has terminated
echo "End\n";

Output for 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13: Start Do something else Are there results? Do something else Are there results? Do something else Are there results? End
Output for 8.0.0: Fatal error: Uncaught Error: Class "Fiber" not found in /in/YrDZ0:2 Stack trace: #0 {main} thrown in /in/YrDZ0 on line 2
Process exited with code 255.
Output for 7.0.33, 7.3.33: Fatal error: Uncaught Error: Class 'Fiber' not found in /in/YrDZ0:2 Stack trace: #0 {main} thrown in /in/YrDZ0 on line 2
Process exited with code 255.

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