3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("", 0, array(), "1", "0"); foreach ($a as $b) { $c = (bool)$b; echo "value = " . var_export($b, true) . "\n"; echo " result = " . var_export($c, true) . "\n"; echo "\n\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 - 5.6.28, 7.0.0 - 7.0.20, 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
value = '' result = false value = 0 result = false value = array ( ) result = false value = '1' result = true value = '0' result = false
preferences:
287.62 ms | 406 KiB | 385 Q