3v4l.org

run code in 300+ PHP versions simultaneously
<?php class d{} $a = array("", 0, array(), "1", "0", "-1", -1, new d); foreach ($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 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 value = '-1' result = true value = -1 result = true value = \d::__set_state(array( )) result = true
Output for 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 - 8.1.27
value = '' result = false value = 0 result = false value = array ( ) result = false value = '1' result = true value = '0' result = false value = '-1' result = true value = -1 result = true value = d::__set_state(array( )) result = true
Output for 5.0.0 - 5.0.5
value = '' result = false value = 0 result = false value = array ( ) result = false value = '1' result = true value = '0' result = false value = '-1' result = true value = -1 result = true value = class d { } result = true
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
value = '' result = false value = 0 result = false value = array ( ) result = false value = '1' result = true value = '0' result = false value = '-1' result = true value = -1 result = true value = class d { } result = false
preferences:
292.58 ms | 402 KiB | 424 Q