Random HTML string functions

PHP trim HTML

function splitFirstP($html) {
	$parts = explode("</p>", $html, 2);
	$parts[0] = $parts[0]."</p>";
	return $parts;
}

function splitCenterContent($html) {
	$return = array();
	$parts = explode("</p>", $html);
	$middle = floor(count($parts) / 2) - 1;
	$j = 0;
	for ($i = 0; $i < count($parts); $i++) {
		$return[$j] .= $parts[$i]."</p>";
		if ($i == $middle) {
			$j++;
		}
	}
	return $return;
}

function splitAtP($html, $middle) {
	$return = array();
	$parts = explode("</p>", $html);
	$count = count($parts);
	
	if ($middle < $count) {
		$middle = $middle - 1;
		$j = 0;
		for ($i = 0; $i < $count; $i++) {
			$return[$j] .= $parts[$i]."</p>";
			if ($i == $middle) {
				$j++;
			}
		}
		return $return;
	}
	return array($html, "");
}

function trimFirstP($html, $count, $append = "") {
	$html = getFirstP($html, $append);
	$html =  BigTree::trimLength($html, $count);
	$html = str_ireplace("</p>", $append."</p>", $html);
	return $html;
}

function getFirstP($html) {
	$start = strpos($html, '<p>');
	$end = strpos($html, '</p>', $start);
	$html = substr($html, $start, ($end - $start + 4));
	return $html;
}