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<?php $months = array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"); $yes = 0; for ($i = 0; $i < 12; ++$i) { $result = date('F',strtotime(strtolower($months[$i]))); if ($result != $months[$i]) { $correct = "no"; } else { $correct = "yes"; $yes++; } echo $correct . " - " . $result . "\n"; } echo "\n" . $yes . " / 12 correct months."; ?>
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 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
yes - January no - March yes - March no - May yes - May no - July yes - July yes - August no - October yes - October no - December yes - December 7 / 12 correct months.
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
yes - January no - January no - January no - January no - January no - January no - January no - January no - January no - January no - January no - January 1 / 12 correct months.

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292.49 ms | 402 KiB | 373 Q