3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = <<<EOT if (1 == 1) { echo 'test'; } while (blah = blah) { echo 'blah'; } EOT; $text = preg_replace('/(?<=\n)\n(?={)/', '', $text); echo $text;
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
if (1 == 1) { echo 'test'; } while (blah = blah) { echo 'blah'; }

preferences:
52.08 ms | 402 KiB | 62 Q