=/ It looks like other people running with CentOS 6 have had 'white screen' errors with completely unrelated scrips. (Do you have just CentOS 6 or do you have 6.4/6.5? Is 6 the exact version?) You turned on the error reporting so now you're getting error messages instead of white, so at least we know something's working.
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StackOverFlow: Getting blank PHP page over Apache
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StackOverFlow: PHP not working in virtual hosts
^ Both of these are with CentOS and virtual/cloud servers.