<?php date_default_timezone_set('UTC'); $date = new \DateTime('2014-01-30'); $date->add(new \DateInterval('P1M')); echo $date->format('Y-m-d') . PHP_EOL; // echoes 2014-03-02 $date = new \DateTime('2014-01-31'); $date->add(new \DateInterval('P1M')); echo $date->format('Y-m-d') . PHP_EOL; // echoes 2014-03-03
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