I wanted to run some PHP right on my Mac, uncommented httpd.conf, activated web sharing, installed MySQL etc. I can\'t seem to find my PHP files, most importantly, PHP.ini.<
As pointed out, the php --ini command will tell you where PHP is expecting to find the php.ini file.
php --ini
For a standard installation, it's likely to be looking for /etc/php.ini
/etc/php.ini
If you've used macports then PHP may be looking for /opt/local/etc/php5/php.ini
/opt/local/etc/php5/php.ini