<?php
    $date = "04-15-2013";
    $date = strtotime($date);
    $date = strtotime("+1 day", $date);
    echo date('m-d-Y', $date);
?>

This is driving me crazy and seems so simple. I'm pretty new to PHP, but I can't figure this out. The echo returns 01-01-1970.

The $date will be coming from a POST in the format m-d-Y, I need to add one day and have it as a new variable to be used later.

Do I have to convert $date to Y-m-d, add 1 day, then convert back to m-d-Y? Would I be better off learning how to use DateTime?

php date
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