1.2.0
The PSR-6 definition on what makes a valid cache key, it is said that keys must support keys consisting of the characters A-Z, a-z, 0-9, _, and . in any order in UTF-8 encoding and a length of up to 64 characters. Implementing libraries MAY support additional characters and encodings or longer lengths, but must support at least that minimum.
- Dashes (
-) are now allowed in cache keys. - The arbitrary maximum key length of 64 characters has been removed.