3v4l.org

run code in 300+ PHP versions simultaneously
<?php $stack = new SplStack(); $stack->push("one"); $stack->push("two"); $serialized = $stack->serialize(); echo $stack->count(), "\n"; $stack->unserialize($serialized); echo $stack->count(), "\n"; $stack->unserialize($serialized); echo $stack->count(), "\n";
Output for 7.3.17 - 7.3.33, 7.4.5 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
2 2 2
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.16, 7.4.0 - 7.4.4
2 4 6
preferences:
142.86 ms | 408 KiB | 5 Q