3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo base_convert( "ff", 16, 10 );
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
255
preferences:
120.26 ms | 402 KiB | 121 Q