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 - 7.1.0
456
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/m1H7J on line 5
Process exited with code 255.