3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(['-(-1)' => 1, '--1' => 1]);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(2) { ["-(-1)"]=> int(1) ["--1"]=> int(1) }
preferences:
104.65 ms | 406 KiB | 5 Q