3v4l.org

run code in 300+ PHP versions simultaneously
<?php $r = sscanf(' ', '%c%n', $c, $n) and var_dump(compact('r', 'c', 'n'));
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.4 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 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 - 8.3.26, 8.4.1 - 8.4.13
array(3) { ["r"]=> int(2) ["c"]=> string(0) "" ["n"]=> int(0) }
Output for 7.0.0 - 7.0.3
array(3) { ["r"]=> int(2) ["c"]=> &string(0) "" ["n"]=> &int(0) }
Output for 4.3.0 - 4.3.1
array(3) { ["r"]=> int(2) ["c"]=> string(0) "" ["n"]=> string(0) "" }

preferences:
416.12 ms | 408 KiB | 5 Q