Cast the value to decrypt to a string to prevent type-errors #25
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both `strlen` and `ctype_xdigit` are now type-hardened expecting an explicit string. Passing in `null` will throw an error. Thus, casting it to string to ensure it is a string, makes sure that PHP doesn't throw an error about the passed in value not being a string.
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both
strlenandctype_xdigitare now type-hardened expecting an explicit string. Passing innullwill throw an error.Thus, casting it to string to ensure it is a string, makes sure that PHP doesn't throw an error about the passed in value not being a string.
Resolvel #24