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run code in 300+ PHP versions simultaneously
<?php var_dump(false === ($date = strtotime('02-01-1970'))); var_dump(date('Y-m-d',$date));
Output for 5.1.3 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 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
bool(false) string(10) "1970-01-02"
Output for 5.1.0 - 5.1.2
bool(true) string(10) "1970-01-01"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
bool(false) string(10) "2007-05-24"

preferences:
293.38 ms | 402 KiB | 378 Q