title: Can execute permission in a php file cause any havoc or problems?
body: <p>I have a database that hosts three different sites. Most files on one have permissions 644, most on the other two have 755, which as I have learnt includes the execute permission. I was wondering if that could cause any problems (not because I want to avoid changing it, just because there are a few problems on one of the site that has execute permissions and I don't know if this could have caused it). I know execute permissions are not strictly speaking necessary for php files but I don't know why, so I don't know if they do anything... Any help would be greatly appreciated!</p>