Json.php

	/**
	 * Decodes a JSON string.
	 * @param  string
	 * @param  boolean
	 * @param  integer
	 * @return mixed
	 */
	public static function decode($json, $assoc = FALSE, $depth = 512)
	{
		$json = (string) $json;
		$value = json_decode($json, $assoc, $depth);
		if ($value === NULL && $json !== '' && strcasecmp($json, 'null')) { // '' do not clean json_last_error
			$error = PHP_VERSION_ID >= 50300 ? json_last_error() : 0;
			throw new JsonException(isset(self::$messages[$error]) ? self::$messages[$error] : 'Unknown error', $error);
		}
		return $value;
	}