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<?php $dtA = new DateTime("01-12-2015 12:35am"); $dtB = new DateTime('now'); $diff = $dtA->diff($dtB); if ( ( ($diff->days * 24 ) * 60 ) + ( $diff->i ) > 1440) echo "24 hours has passed."; else echo "has not reached the 24 hour mark";
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 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
24 hours has passed.

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