Here are some configurations in Apache and PHP needed to make your server PCI compliant.
Only allow secure SSL versions (version 3 and TLS 1)
SSLProtocol -ALL +SSLv3 +TLSv1
Only allow secure Ciphers
Keep PHP from giving out info about itself (php.ini)
expose_php = Off
Also of note, PHP 4 is dying. Need to move to PHP 5 asap.
Did this help you out? It took me a few days to piece together all this information together, I hope this saves you some time (who knows, maybe the future me will be thankful I wrote this down). Let me know your thoughts. email@example.com