3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); $id = session_id(); $charSum = hexdec($id[0] . $id[1]); echo $charSum % 4;
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, 7.2.0, 7.2.4, 7.2.9, 7.2.12, 7.2.30, 7.3.1, 7.3.21 - 7.3.24, 7.3.26, 7.3.30, 7.4.0, 7.4.4 - 7.4.6, 7.4.8 - 7.4.9, 7.4.21, 8.0.0 - 8.0.2, 8.0.7, 8.0.9, 8.0.17 - 8.0.18, 8.0.20, 8.0.28, 8.1.6 - 8.1.7, 8.1.11, 8.1.13, 8.1.15, 8.1.19, 8.1.23, 8.1.28, 8.2.2, 8.2.9 - 8.2.13, 8.2.18, 8.3.2, 8.3.6
0
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, 7.2.3, 7.2.7, 7.2.29, 7.2.31, 7.3.16 - 7.3.19, 7.3.32, 7.4.7, 7.4.11, 7.4.16, 7.4.22 - 7.4.25, 7.4.27, 7.4.30 - 7.4.32, 8.0.3, 8.0.6, 8.0.8, 8.0.14 - 8.0.15, 8.0.22, 8.0.26 - 8.0.27, 8.1.4, 8.1.8, 8.1.10, 8.1.14, 8.1.17, 8.1.20, 8.1.24 - 8.1.26, 8.2.3 - 8.2.4, 8.2.7 - 8.2.8, 8.2.15, 8.2.17, 8.3.0, 8.3.5
1
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, 7.1.25, 7.2.8, 7.2.11, 7.2.33, 7.3.0, 7.3.20, 7.3.25, 7.4.10, 7.4.12, 7.4.14 - 7.4.15, 7.4.28, 8.0.5, 8.0.10, 8.0.12 - 8.0.13, 8.0.19, 8.0.30, 8.1.0 - 8.1.1, 8.1.12, 8.1.16, 8.1.27, 8.2.0, 8.2.5, 8.2.14, 8.2.16, 8.3.4
2
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 - 7.1.20, 7.2.1 - 7.2.2, 7.2.5 - 7.2.6, 7.2.10, 7.2.13, 7.2.32, 7.3.27 - 7.3.29, 7.3.31, 7.3.33, 7.4.3, 7.4.13, 7.4.20, 7.4.26, 7.4.29, 7.4.33, 8.0.11, 8.0.16, 8.0.21, 8.0.23 - 8.0.25, 8.0.29, 8.1.2 - 8.1.3, 8.1.5, 8.1.9, 8.1.18, 8.1.21 - 8.1.22, 8.2.1, 8.2.6, 8.3.1, 8.3.3
3

preferences:
169 ms | 409 KiB | 240 Q