3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = "😜House-3-BLUE]"; echo mb_substr($str,0,1).mb_strtolower(mb_substr($str,1,1)).mb_substr($str,2);
Output for 7.1.25 - 7.1.30, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
😜house-3-BLUE]
preferences:
91.69 ms | 1472 KiB | 4 Q