3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php session_start(); $id = session_id(); $charSum = hexdec($id[0] . $id[1]); echo $charSum % 4;
based on b3hDo
Output for 5.5.2 - 5.5.3, 5.5.6, 5.5.15 - 5.5.16, 5.5.20, 5.5.27, 5.5.29, 5.5.35, 5.5.37, 5.6.2, 5.6.12 - 5.6.13, 5.6.16, 5.6.19 - 5.6.20, 5.6.24, 7.0.4, 7.0.6, 7.0.8 - 7.0.10, 7.1.6 - 7.1.7, 7.2.0
1
Output for 5.5.0 - 5.5.1, 5.5.10, 5.5.14, 5.5.18, 5.5.25, 5.5.28, 5.5.30, 5.5.34, 5.6.1, 5.6.17, 5.6.23, 5.6.25, 7.0.0, 7.0.20, 7.1.5, 7.1.10
3
Output for 5.5.4 - 5.5.5, 5.5.7 - 5.5.8, 5.5.11, 5.5.19, 5.5.21 - 5.5.22, 5.5.24, 5.5.38, 5.6.6 - 5.6.8, 5.6.10 - 5.6.11, 5.6.18, 5.6.22, 5.6.28, 7.0.1, 7.0.7, 7.1.0
2
Output for 5.5.9, 5.5.12 - 5.5.13, 5.5.23, 5.5.26, 5.5.31 - 5.5.33, 5.5.36, 5.6.0, 5.6.3 - 5.6.5, 5.6.9, 5.6.14 - 5.6.15, 5.6.21, 7.0.2 - 7.0.3, 7.0.5
0