3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(STDIN); var_export(STDIN);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
resource(1) of type (stream) NULL
preferences:
68.26 ms | 406 KiB | 5 Q