3v4l.org

run code in 300+ PHP versions simultaneously
<?php $generator = (function ($s) { yield from $s; })(['foo', 'bar']); echo $generator->current(); $generator->next(); $generator->next(); echo $generator->current(); $generator->rewind(); echo $generator->current();
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
foo Fatal error: Uncaught Exception: Cannot rewind a generator that was already run in /in/iZlvU:8 Stack trace: #0 /in/iZlvU(8): Generator->rewind() #1 {main} thrown in /in/iZlvU on line 8
Process exited with code 255.
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84.18 ms | 407 KiB | 5 Q