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<?php $a = (bool)'0'; $b = empty('0'); $c = ((bool) empty('0')); var_dump($a); var_dump($b); var_dump($c);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
bool(false) bool(true) bool(true)
preferences:
177.36 ms | 403 KiB | 173 Q