- print_r: documentation ( source)
<?php
echo "Result for Saturday, January 1, 2000:";
$d = cal_to_jd(CAL_GREGORIAN, 1, 1, 2000);
print_r(cal_from_jd($d, CAL_GREGORIAN));
echo "\n\n";
echo "Result for Sunday, January 2, 2000:";
$d = cal_to_jd(CAL_GREGORIAN, 1, 2, 2000);
print_r(cal_from_jd($d, CAL_GREGORIAN));