function get_array_data($arr = array() , $keyName = '', $type = 'string', $defaultVal = null) {
		if (empty($arr)) {
			return $defaultVal;
		} 
		else {
			if (is_array($keyName)) {
				//Get by main name or alternative name.
				$value = array_key_exists($keyName[0], $arr) ? $arr[$keyName[0]] : (array_key_exists($keyName[1], $arr) ? $arr[$keyName[1]] : $defaultVal);
			} 
			else {
				$value = array_key_exists($keyName, $arr) ? $arr[$keyName] : $defaultVal;
			}
			if (!is_null($value)) {
				
				//Check boolean, string, numeric, array
				if (in_array($type, array(
					'bool',
					'boolean'
				))) {
					$trueVals = array(
						'1',
						1,
						'yes',
						'y',
						'on',
						'true',
						true
					);
					if (in_array($value, $trueVals)) {
						$value = 1;
					}
					$value = 0;
				} 
				elseif ($type == 'string') {
					$value = (string)$value;
				} 
				elseif ($type == 'int') {
					$value = (int)$value;
				} 
				elseif ($type == 'float') {
					$value = (float)$value;
				} 
				elseif ($type == 'double') {
					$value = (double)$value;
				} 
				elseif ($type == 'array') {
					if (!is_array($value)) {
						$value = false;
					}
				}
			}
			return $value;
		}
	}