3v4l.org

run code in 300+ PHP versions simultaneously
<?php $pinned = 1; $fullTextEnabled = null; $updateMode = 0; $attributes = [ 'pinned' => $pinned, 'fullTextEnabled' => $fullTextEnabled, 'updateMode' => $updateMode ]; $diff = array_filter($attributes, is_null); var_dump($diff);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "is_null" in /in/k2M0h:11 Stack trace: #0 {main} thrown in /in/k2M0h on line 11
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant is_null - assumed 'is_null' (this will throw an Error in a future version of PHP) in /in/k2M0h on line 11 array(1) { ["fullTextEnabled"]=> NULL }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant is_null - assumed 'is_null' in /in/k2M0h on line 11 array(1) { ["fullTextEnabled"]=> NULL }
preferences:
188.18 ms | 403 KiB | 227 Q