3v4l.org

run code in 300+ PHP versions simultaneously
<?php $c =0; $a = 5; $b = &$c; echo ++$a . ($b = &$a, $a++);
Output for 5.3.0 - 5.3.26, 5.4.0 - 5.4.16
Parse error: syntax error, unexpected ',' in /in/v17P7 on line 5
Process exited with code 255.
preferences:
175.01 ms | 1395 KiB | 51 Q