3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump( 'a' + 'b' );
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/RvYX4 on line 3 Warning: A non-numeric value encountered in /in/RvYX4 on line 3 int(0)
Output for 4.3.0 - 7.0.20
int(0)