3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo "a1" + "b2";
based on LPfOr
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/SgNH4 on line 3 Warning: A non-numeric value encountered in /in/SgNH4 on line 3 0
Output for 5.3.19 - 7.0.20
0