Actually, you are quite right when it comes to header/footer. Here is some basic information on how each of the major HTML5 tags can/should be used (I suggest reading the full source linked at the bottom):
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CodeMagic Tinymce plugin
About CodeMagic is an advanced source code editor plugin for Tinymce. It integrates CodeMirrorlibrary for syntax coloring and Jsbeautifier library for code formating and indentation.
Highlight PHP and JavaScript Code with PHP
PHP has a cool function that automatically highlights PHP code called highlight_string();Theoretically this could be used to roll your own code highlighting on a site, rather than rely on JavaScript or some kind of external service to do it. In this article I’ll show you the basics of how it works, then extended it with …
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