Recursive match for array keys based of checking through a array of variables in a mustache template with it's includes

example.php

<?php
class ArrUtils
{
	/**
	 * @param $searchKey
	 * @param $dataArray
	 * @return boolean
	 */
	protected function isKeyInArray($searchKey, $dataArray)
	{
		// Ignore endif statements
		if ($searchKey[0] === '/') {
			return true;
		}
	
		// Include if/else blocks
		if ($searchKey[0] === '#' || $searchKey[0] === '^') {
			$searchKey = substr($searchKey, 2, strlen($searchKey) - 2);
		}
	
		if (array_key_exists($searchKey, $dataArray)) {
			return true;
		}
	
		foreach ($dataArray as $element) {
			if (is_array($element)) {
				if ($this->isKeyInArray($searchKey, $element)) {
					return true;
				}
			}
		}
	
		return false;
	}
}