str_replace around pre/code tags

gistfile1.txt

function str_replace_around_pre_code( $_search, $_replace, $content ) {
	$new_content = '';
	// deal with matches inside pre and code tags. we don't want to have links in sourcecode so only process around this.
	if ( preg_match_all( "/(.*)(<(pre|code).*>.+<\/(pre|code)>)(.*)/msiU", $content, $content_split, PREG_PATTERN_ORDER ) ) {
		foreach ( $content_split[0] as $cnt_key => $raw ) {
			foreach( $_search as $key => $search ) {
				$content_split[1][$cnt_key] = str_replace( $search, $_replace[$key], $content_split[1][$cnt_key] );
				$content_split[5][$cnt_key] = str_replace( $search, $_replace[$key], $content_split[5][$cnt_key] );
			}
			$new_content .= $content_split[1][$cnt_key] . $content_split[2][$cnt_key] . $content_split[5][$cnt_key];
		}
	}
	if ( !empty( $new_content ) )
		return $new_content;
	return $content;
}