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<?php $str = strtotime("February"); var_dump(array( 'type' => gettype($str), 'val' => $str, 'date' => date('F',$str) ));
Output for 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 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { ["type"]=> string(7) "integer" ["val"]=> int(1392937200) ["date"]=> string(8) "February" }
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
array(3) { ["type"]=> string(7) "integer" ["val"]=> int(1392940800) ["date"]=> string(8) "February" }
Output for 5.1.0 - 5.1.6
array(3) { ["type"]=> string(7) "boolean" ["val"]=> bool(false) ["date"]=> string(7) "January" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
array(3) { ["type"]=> string(7) "integer" ["val"]=> int(-1) ["date"]=> string(7) "January" }

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244.43 ms | 402 KiB | 400 Q