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Informations about the package data-encoding
Data Encoding
PHP complete implementation of RFC 4648. Provides methods for data encoding and decoding in multiple bases - including custom encoding.
Uses bitwise operations to provide faster processing than string functions would do.
Note that both base16 and base64 encoding styles are already natively supported by PHP through base64_encode/base64_decode and bin2hex/hex2bin functions.
1 Installation
2 Usage
The following encoding styles - defined in RFC 4648 - are natively provided by this library:
- base16:
- Encoding with case-insensitive 16 character alphabet;
- Available through
Base16class;
- base32:
- Encoding with case-insensitive 32 character alphabet;
- Available through
Base32class;
- base32hex:
- Base32 with base16 extended alphabet;
- Available through
Base32Hexclass;
- base64:
- Encoding with case-sensitive 64 character alphabet;
- Available through
Base64class;
- base64url:
- Base64 with URL/filename safe character alphabet.
- Available through
Base64Urlclass;
You can easily extend the Encoder class to create custom encoding styles. See 2.3 Creating custom encodings.
2.1 Encoding
Encoding is available through the encode() static method in all encoder classes listed above.
2.2 Decoding
Decoding is available through the decode() static method in all encoder classes listed above.
2.3 Creating custom encodings
For custom encoding, you must extend the Encoder class and set the following properties (all static):
int $base:- Required;
- Is the number of characters the alphabet should have;
- Must be a power of 2;
array $alphabet:- Required;
- Is a list with all the alphabet's characters;
- Must have unique characters only;
- Is accessed with indexes generated by the bits of input data;
bool $isCaseSensitive:- Required;
- Defines whether the alphabet is case-sensitive;
- Example: if not case-sensitive, decoding
MZXW6===andmzxw6===would generate identical results;
string $alphabetEncoding:- Optional - defaults to "ASCII";
- Is the encoding system used by the alphabet characters;
- Non-ASCII alphabets MUST have their encoding explicitly defined;
- Is used to build and split the encoded string;
string $paddingCharacter:- Optional - defaults to "=";
- Is used to pad encoded strings;
- Must not exist in the alphabet.
Example with ASCII alphabet:
Example with Unicode alphabet:
3 Testing
Tests were made with PHPUnit. Use the following command to run all of them.
