- strftime: documentation ( source)
- setlocale: documentation ( source)
<?php
echo setlocale(LC_TIME, 0);
echo "\n";
echo strftime("%I:%M %p", "1517834703");
echo "\n";
echo setlocale(LC_TIME, 'en_GB.UTF-8');
echo "\n";
echo strftime("%I:%M %p", "1517834703");