3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $trx_nb = array(); $trx_nb[1] +=1; echo $trx_nb[1]; $trx_nb[1] +=1; echo $trx_nb[1]; $trx_nb[1] +=1; echo $trx_nb[1]; $trx_nb[1] +=1; echo $trx_nb[1];
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined offset: 1 in /in/I5CLN on line 6 1234
Output for hhvm-3.10.0 - 3.12.0
1234
Output for 4.3.0 - 5.2.17
Notice: Undefined offset: 1 in /in/I5CLN on line 6 1234