/**
* Combine duplicate <p> tags
* input: <p class="aaa" a="1"><!-- ... --><p class="bbb" b="2">
* output: <p class="aaa bbb" a="1" b="2"><!-- ... -->
*/
public static function combinePTags(&$string)
{
if (empty($string)) {
return;
}
$p_start_tag = '<p(?: [^>]*)?>';
$optional_tags = '\\s*(?:<\\!-- [^>]*-->| |&\\#160;)*\\s*';
if (!preg_match_all('#(' . $p_start_tag . ')(' . $optional_tags . ')(' . $p_start_tag . ')#si', $string, $tags, PREG_SET_ORDER) > 0) {
return;
}
foreach ($tags as $tag) {
$string = str_replace($tag['0'], $tag['2'] . NNText::combineTags($tag['1'], $tag['3']), $string);
}
}