3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = range('a', 'z'); foreach ($arr as $char) { printf("%s,%s", $char, '\n'); }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
a,\nb,\nc,\nd,\ne,\nf,\ng,\nh,\ni,\nj,\nk,\nl,\nm,\nn,\no,\np,\nq,\nr,\ns,\nt,\nu,\nv,\nw,\nx,\ny,\nz,\n
preferences:
188.95 ms | 406 KiB | 310 Q