PHP 代码：【复制】 
function inContent($str,$start,$end,$add = true) {
	$first = strstr($str,$start);
	if ($first == false) {
		return array();
	}
	else  {
		$first = substr($first,strlen($start));
	}
	$second = strstr($first,$end);
	if ($second == false) {
		if ($add) {
			return array($start.$first);
		}
		else {
			return array($first);
		}
	}
	$final = substr($first,0,-strlen($second));
	if ($add) {
		$final = $start.$final.$end;
	}
	$result[] = $final;
	$second = substr($second,strlen($end));
	if (strstr($second,$start)) {
		$result = array_merge($result,inContent(substr($second,strlen($end)),$start,$end,$add));
	}
	return $result;
}