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Informations about the package base64url
Base64URL | URL-Safe Base64 Encoding
Ultra-lightweight PHP library for URL-safe base64 encoding and decoding. Perfect for JWT tokens, URL parameters, API keys, and any scenario requiring base64 encoding without URL-unsafe characters (+, /, =).
Install
Why Base64URL?
- ✨ URL-Safe - No special characters that need URL encoding
- 🔧 RFC 4648 Compliant - Follows official base64url specification
- ⚡ Blazing Fast - Minimal overhead, optimized string operations
- 🎯 Drop-in Replacement - Simple API, easy migration from base64_encode/decode
- 📦 Lightweight - Just 2 functions, zero dependencies
- 🚀 Production Ready - Battle-tested in JWT and API implementations
Features
- URL-Safe Encoding: Replaces
+with-and/with_, removes padding= - Input Validation: Strict validation prevents invalid characters in decoding
- UTF-8 Support: Handles multibyte characters correctly (Chinese, Korean, Japanese, etc.)
- Binary Safe: Works with any binary data, not just text
- Legacy Compatible: Works with PHP 5.6+ through PHP 8.4
- Zero Dependencies: No external libraries or extensions required
- 100% Test Coverage: Fully tested with comprehensive test suite
Perfect for
- JWT Tokens: Encoding JWT payloads and signatures
- URL Parameters: Safely encode data in query strings
- API Keys: Generate URL-safe API tokens and keys
- OAuth: State parameters and authorization codes
- File Names: Encode data for use in file names
- Cookies: Store encoded data in cookies without escaping
Requirements
- PHP: 5.6 or higher
- Extensions: None (uses only core PHP functions)
- Dependencies: Zero
Basic usage
API Reference
base64url_encode(string $string): string
Encodes a string using URL-safe base64 encoding.
Parameters:
$string- The string to encode (binary-safe)
Returns:
- URL-safe base64 encoded string (no
+,/, or=characters)
Example:
base64url_decode(string $string): string|false
Decodes a URL-safe base64 encoded string.
Parameters:
$string- The base64url encoded string
Returns:
- Decoded string on success,
falseon invalid input
Example:
Testing
The library is thoroughly tested with comprehensive test coverage:
- Test Framework: Pest
- Total Tests: 16 passing
- Code Coverage: 100% (lines and functions)
Test Categories
- Basic Functionality: Encoding and decoding operations
- UTF-8 Support: Multibyte character handling
- Edge Cases: Empty strings, padding scenarios
- Input Validation: Invalid character detection
- Round-trip Tests: Encode → Decode consistency
- Binary Safety: Handling non-text data
Comparison: Standard Base64 vs Base64URL
| Feature | base64_encode/decode | base64url_encode/decode |
|---|---|---|
| URL-Safe | ❌ No (contains +/=) |
✅ Yes (uses -_) |
| Padding | ✅ Yes (=) |
❌ No (removed) |
| RFC 4648 Section 4 | ✅ Yes | ❌ No |
| RFC 4648 Section 5 | ❌ No | ✅ Yes |
| Use in URLs | ⚠️ Requires encoding | ✅ Direct use |
| JWT Compatible | ❌ No | ✅ Yes |
Keywords
base64url, url-safe-encoding, base64-encoding, jwt, php-encoder, rfc-4648, url-encoding, api-tokens, zero-dependencies, php-library
All versions of base64url with dependencies
PHP Build Version
Package Version
Requires
php Version
^5.6 || ^7.0 || ^8.0
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