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The best approach I found was to incorporate CSSTidy into my plugin. I took a page from JetPack which has a Custom CSS feature. JetPack's CSSTidy implementation is contained in the Jetpack_Safe_CSS class as function, filter_attr. I couldn't entirely figure out why JetPack was nesting the user entered CSS inside a 'div' element prior to parsing, but after ...


The wp_strip_all_tags() function will remove all HTML, including the content of script and style tags. The PHP strip_tags() function largely does the same thing, except it won't eliminate the content of script and style tags. WP's wp_strip_all_tags() function uses this after eliminating the scripts and styles manually. The wp_filter_nohtml_kses() function ...

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