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<?php $NaN = sqrt(-1); var_dump($NaN === $NaN); var_dump(array($NaN) === array($NaN)); $a = array($NaN); $b = $a; var_dump($a === $b); reset($b); var_dump($a === $b);
Output for 5.3.15 - 5.3.29, 5.4.5 - 5.4.45, 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 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(false) bool(false) bool(true) bool(false)
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 - 5.3.14, 5.4.0 - 5.4.4
bool(false) bool(false) bool(false) bool(false)
preferences:
154.23 ms | 408 KiB | 5 Q