- strtotime: documentation ( source)
<?php
// GOOGL
echo strtotime('Wednesday, August 20, 2014 18:28:08 UTC-240');
//Wrong SOLB-EEB
echo strtotime('Wednesday, August 20, 2014 18:28:08 UTC120');
// Correct SOLB-EEB time string
// Note that if the value is positive there should be a space between UTC and the offset
echo strtotime('Wednesday, August 20, 2014 18:28:08 UTC+120');