3v4l.org

run code in 300+ PHP versions simultaneously
<?php $counts = array(); $item = 2; $counts[$item] ?? $counts[$item] = 1 ?? $counts[$item]++; var_dump($counts); $counts[$item] ?? $counts[$item] = 1 ?? $counts[$item]++; var_dump($counts);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(1) { [2]=> int(1) } array(1) { [2]=> int(1) }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/PlAHH on line 5
Process exited with code 255.
preferences:
111.23 ms | 407 KiB | 5 Q