timestamp to date convert in php

Use PHP's date() function.

Example:

echo date('m/d/Y', 1299446702);

I just added H:i:s to Rocket's answer to get the time along with the date.

echo date('m/d/Y H:i:s', 1299446702);

Output: 03/06/2011 16:25:02

timestamp to date convert in php