3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace X; $iterator = new \RegexIterator( new \ArrayIterator( ['A.phpt', 'B.phpt', 'C.phpt'] ) , '/\.phpt$/' , \RegexIterator::MATCH ) ; foreach ($iterator as $foo) { var_dump($foo); preg_replace('/\.phpt$/', '', ''); } echo "Done", PHP_EOL;
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.2.18, 8.3.0 - 8.3.6
string(6) "A.phpt" string(6) "B.phpt" string(6) "C.phpt" Done

preferences:
141.47 ms | 404 KiB | 213 Q