I have the same question but was told by support that easy apache 4 will not be able to use php 5.2 or php 5.3. We need to be able to use php version 5.2 and up. Has that changed now? I asked support this question about 1 week ago.
EA4 does not support PHP 5.2 or 5.3. 5.2 especially is chock full of security vulnerabilities and should not be run under any circumstances. Doing so is just asking for a compromise - not to mention I can almost guarantee any software that old is going to have vulnerabilities.