3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = "FOObarBAZ"; //////////////////// $t = strtolower($s); //////////////////// echo $t;
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
foobarbaz
preferences:
49.29 ms | 838 KiB | 4 Q