gistfile1.php

<?php
// Multi Dimensional Array Search
private function searchForId($id, $array)
{
	$value = '';

	foreach ($array as $key => $val)
	{
		if ($val['hotel_PPID'] == $id)
		{
			$value = $key;
			break;
		}
	}

	//extra logi
	if(! empty($value))
	{
		//do something else
	}

	return $value;
}

// Usage
if(! empty($this->searchForId($hotel_id,$this->hotelsInfos->hotels_infos)))
{
	$bestRate[$hotel_id][$this->current_occupancy]['currency'] = (string)$prices->name;
	$bestRate[$hotel_id][$this->current_occupancy]['price']    = (string)$prices->value->double;
}
?>