For this page,i'm using the subsilver template which is common with PHP pages and widely used in PHP forums.As shown in the following meta tags i'm using this template with HTML page <html> <head> <meta name="description""> <meta name="keywords""> <link rel="stylesheet" href="images/subSilve.css" type="text/css">which is Associated with subsilve.css file My questions are Does this technique affect SEO for this page? Should i save HTML pages as PHP pages? or do i have to disable this technique?