3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($a) { $page = isset($a['page']) ? $a['page'] : 1; echo $page, "\n"; $page = $a['page'] ?? 1; echo $page, "\n"; } $a = array(); foo($a); $a = array('page' => Null); foo($a); $a = array('page' => 0); foo($a); ?>
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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
1 1 1 1 0 0
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.25
Parse error: syntax error, unexpected '?' in /in/D8O4L on line 8
Process exited with code 255.
preferences:
167.44 ms | 402 KiB | 226 Q