<?php date_default_timezone_set('Europe/Berlin'); // birthdate format is YYYY-MM-DD $birth = new DateTime('1966-01-21'); $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 45 $birth = new DateTime('1966-01-23'); $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 45 wrongly $birth = new DateTime('1966-01-24'); // three days difference! $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 44 - correct ?>
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