- print_r: documentation ( source)
<?php
print_r(DateTime::createFromFormat('j/n/Y', '7/17/2014'));
print_r(DateTime::createFromFormat('d/m/Y', '07/17/2014'));
print_r(DateTime::createFromFormat('j-n-Y', '7-17-2014'));
print_r(DateTime::createFromFormat('d-m-Y', '07-17-2014'));