- Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Warning: preg_replace(): Compilation failed: lookbehind assertion is not fixed length at offset 0 in /in/qoEooV on line 3 NULL
<?php
var_dump(preg_replace('~(?<!^ {0,50}) //~', '-', ' // x // y'));