3v4l.org

run code in 300+ PHP versions simultaneously
<?php $queue = new SplPriorityQueue(); $queue->insert('1',0); $queue->insert('2',0); $queue->insert('3',0); $queue->insert('4',0); $queue->insert('5',0); while($queue->valid()){ var_dump( $queue->current() ); $queue->next(); }
Output for 5.5.0 - 5.5.38, 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 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
string(1) "1" string(1) "5" string(1) "4" string(1) "3" string(1) "2"
preferences:
268.1 ms | 404 KiB | 331 Q