It is a concept of Encoding and Decoding the data. Basically, we have two types of Encryption in PHP. Those are
By using this, we can encode the data but we cannot decode encoded data.
1. md5() function: (Message-Digest 5)
By using this function, we can encode the data as 32 characters length, alphanumeric string.
md5() function returns the calculated md5 hash on success, or false on failure.