3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x =array( array(), "", 0, false, null ); foreach ($x as $val) { if (!$val) { print "The condition is unexpectedly true, though it's not a boolean and was magically converted\n"; } }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
The condition is unexpectedly true, though it's not a boolean and was magically converted The condition is unexpectedly true, though it's not a boolean and was magically converted The condition is unexpectedly true, though it's not a boolean and was magically converted The condition is unexpectedly true, though it's not a boolean and was magically converted The condition is unexpectedly true, though it's not a boolean and was magically converted

preferences:
275.73 ms | 405 KiB | 330 Q