3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=array('0.txt','1.txt','2.txt','3.txt'); $n=(int)current(explode('.',end($a))); echo $n+=1; $a[]=$n.txt; $n=(int)current(explode('.',end($a))); echo $n+=1; $a[]=$n.txt; $n=(int)current(explode('.',end($a))); echo $n+=1; $a[]=$n.txt; ?>
Output for 4.3.0 - 5.0.4, 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
4 Notice: Use of undefined constant txt - assumed 'txt' in /in/VkX95 on line 7 5 Notice: Use of undefined constant txt - assumed 'txt' in /in/VkX95 on line 10 6 Notice: Use of undefined constant txt - assumed 'txt' in /in/VkX95 on line 13
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/VkX95 on line 5
Process exited with code 255.