This is a couple of very simple functions allowing to store an arbitrary string in multiple strings and rebuild it if some of the generated strings are missing (depending on the numbers defined when initially generating).
raidSplit($string, $parts = 3, $min_req = 2)
This will return an array containing $parts entries. Note that the returned data is binary and you will most usually want to apply something such as base64_encode() on it. You can define the number of parts to generate and the minimum number of required parts to rebuild the string.
raidRepair(array $data, $length)
This will reconnect data based on provided array and return the original string.
Note that while it should be possible to check the received data by using parity information as a kind of checksum, the focus of those two methods is to deal with loss of data rather than corruption.