3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = {1,2,3,4}; $b = {5,6}; $c = {a,b,c}; echo $a;
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '{' in /in/5GvVj on line 2
Process exited with code 255.
preferences:
172.16 ms | 1399 KiB | 62 Q