Posted By

feeela on 04/02/11

Tagged

Versions (?)

Last Edited at 04/02/11 01:22am

Statistics

Viewed 840 times

Favorited by 0 user(s)

Related snippets

add CDATA to script- and style-tags via regex using PHPs output buffering

/ Published in: PHP

This snippet can be used to sanitize HTML when delivering it as XHTML. For example Firefox 2 needs XML-data to not mess up with HTML5-tags.
Everything (at least there must be one character) between script/style-tags is enclosed by a CDATA-block.
The whole functionality is provided as a callback function to `ob_start()`, which should be used before any output. The use of `ob_flush()`, `ob_clean()` or something is optional as the buffer will be sent on script end anyway.

Highlighted TextExpand

// do this if MIME type is 'application/xhtml+xml'
ob_start(function ($buffer) {
	$replacer = array(
		'/(<script[^<>]*>)([^<>]+)(<\/script>)/' => '$1<![CDATA[ $2 ]]>$3',
		'/(<style[^<>]*>)([^<>]+)(<\/style>)/' => '$1<![CDATA[ $2 ]]>$3',
/* more replaces may follow, like:
 * replace ampersand-characters, which are not part of an entity or within a CDATA-block
		'/&(?!(?:[a-zA-Z][a-zA-Z0-9]*|#\d+);)(?!(?>(?:(?!<!\[CDATA\[|\]\]>).)*)\]\]>)/s' => '&#38;',
 * replace html-entities with xml entities
		'/&nbsp;/' => '&#160;',
 */
	);
	return preg_replace(array_keys($replacer), array_values($replacer), $buffer);
});

/* a script-block like

* will translate to

Report this snippet Tweet

Comments

Subscribe to comments

Comment:

You need to login to post a comment.