3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "2x1 image"; echo substring($a,0, 3);
Output for 7.0.0 - 7.3.0rc4
Fatal error: Uncaught Error: Call to undefined function substring() in /in/W6GIu:5 Stack trace: #0 {main} thrown in /in/W6GIu on line 5
Process exited with code 255.
Output for 5.3.20 - 5.6.28
Fatal error: Call to undefined function substring() in /in/W6GIu on line 5
Process exited with code 255.