3v4l.org

run code in 300+ PHP versions simultaneously
<?php $bool = false; $int = 0; echo 'is ', var_export($bool, true), ' == ', var_export($int, true), '? ', var_export($bool == $int), "\n"; $str = (string)$bool; echo 'is ', var_export($str, true), ' empty? ', var_export(empty($str)), "\n"; $int = (int)$str; echo 'is ', var_export($int, true), ' empty? ', var_export(empty($int)), "\n";
Output for 4.3.0 - 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 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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
is false == 0? true is '' empty? true is 0 empty? true
preferences:
318.85 ms | 406 KiB | 425 Q