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[Utility & Helpers](/categories/utility) 4. / 5. amashukov/abi-encoder-php ActiveLibrary[Utility & Helpers](/categories/utility) amashukov/abi-encoder-php ========================= Solidity ABI calldata encoder in pure PHP — function selectors plus static (address/uint/int/bytesN) and dynamic (string/bytes) types, byte-for-byte equivalent to ethers.js v6. v0.1.0(2mo ago)0357↑31.4%2MITPHPPHP >=8.3CI passing Since May 24Pushed 2mo agoCompare [ Source](https://github.com/AndreyMashukov/abi-encoder-php)[ Packagist](https://packagist.org/packages/amashukov/abi-encoder-php)[ RSS](/packages/amashukov-abi-encoder-php/feed)WikiDiscussions main Synced 3w ago READMEChangelogDependencies (6)Versions (2)Used By (2) amashukov/abi-encoder-php ========================= [](#amashukovabi-encoder-php) Solidity ABI calldata encoder in pure PHP — byte-for-byte parity with ethers.js v6. [![CI](https://camo.githubusercontent.com/4901bcfbaef53703ff2acde8172355af61c37d35c71407bc6258898f233c57c8/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f616374696f6e732f776f726b666c6f772f7374617475732f416e647265794d617368756b6f762f6162692d656e636f6465722d7068702f63692e796d6c3f6272616e63683d6d61696e266c6162656c3d4349)](https://github.com/AndreyMashukov/abi-encoder-php/actions)[![PHPStan L9](https://camo.githubusercontent.com/15184d00ff6bb0a6831360bb709d42c3bb9a3a21795bd6894c613034d1cb026c/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f616374696f6e732f776f726b666c6f772f7374617475732f416e647265794d617368756b6f762f6162692d656e636f6465722d7068702f7374616e2e796d6c3f6272616e63683d6d61696e266c6162656c3d5048505374616e2532304c39)](https://github.com/AndreyMashukov/abi-encoder-php/actions)[![Latest Version](https://camo.githubusercontent.com/3e10ce96f0c6e0b48d7e69b58bba8ba11b71d381068c8ae11448c4e935f79bb7/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f616d617368756b6f762f6162692d656e636f6465722d706870)](https://packagist.org/packages/amashukov/abi-encoder-php)[![Downloads](https://camo.githubusercontent.com/98659ab4204f7576b86aa4d4b3e4c0ef77bcc556e70c3771a3f752d288292b88/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f616d617368756b6f762f6162692d656e636f6465722d706870)](https://packagist.org/packages/amashukov/abi-encoder-php)[![PHP](https://camo.githubusercontent.com/f4819b8601ecbc26ee50c279e3d4e5ddf55c0ee62db9fd1c76ae75bcae139981/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f646570656e64656e63792d762f616d617368756b6f762f6162692d656e636f6465722d7068702f706870)](https://packagist.org/packages/amashukov/abi-encoder-php)[![License](https://camo.githubusercontent.com/efa62e2f3c79e14fed839131c015507189aa6cd17c4fa5fff2f4c8f3760970ec/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f6c2f616d617368756b6f762f6162692d656e636f6465722d706870)](LICENSE)[![Stars](https://camo.githubusercontent.com/b04b89fb17c9b8d2b62ed4a4ab049a4203492bc6e273f9bcf2b06e570abfe06c/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f73746172732f416e647265794d617368756b6f762f6162692d656e636f6465722d7068703f7374796c653d736f6369616c)](https://github.com/AndreyMashukov/abi-encoder-php) Encode **Ethereum / EVM Solidity ABI calldata** in pure PHP: function selectors (`methodId`), static head types (`address`, `uint8` / `uint24` / `uint256`) and top-level dynamic types (`bytes`, `string`). Output is **byte-for-byte equivalent to `ethers.js` v6** `Interface.encodeFunctionData`, so calldata built in PHP matches what your JavaScript tooling and Solidity contracts expect. Features -------- [](#features) - Function selector (`methodId`) from a canonical signature via keccak-256. - Full call encoding (selector + head + dynamic tail) in one call. - Component encoders: `encodeAddress`, `encodeUint`, `encodeBytes`. - Bigint-safe `uint256` via `ext-gmp` — accepts hex or decimal strings, handles max uint256. - Byte-for-byte parity with ethers.js v6 (cross-validated in tests). - PHPStan level 9 clean, `strict_types`. Why amashukov/abi-encoder-php ----------------------------- [](#why-amashukovabi-encoder-php) Most PHP web3 stacks pull in `web3p/web3.php` (and its `web3p/ethereum-abi`) for ABI encoding, which is a much larger surface than a contract call usually needs. This package is intentionally narrow and dependency-light: it covers the head-only static types and top-level dynamic `bytes` / `string` that real EVM contract calls use, with explicit ethers.js v6 parity as the correctness bar. If you only need to build calldata for `eth_sendRawTransaction`, this is the focused tool. Installation ------------ [](#installation) ``` composer require amashukov/abi-encoder-php ``` Usage ----- [](#usage) ### Function selector [](#function-selector) ``` use Amashukov\AbiEncoder\AbiEncoder; AbiEncoder::methodId('withdraw(address,uint256)'); // 'f3fef3a3' ``` The selector is the first 4 bytes of the keccak-256 hash of the canonical signature, returned as 8 hex chars (no `0x`). ### Encode a full call [](#encode-a-full-call) ``` $calldata = AbiEncoder::encodeCall('withdraw(address,uint256)', [ ['address', '0x1234567890123456789012345678901234567890'], ['uint256', '500000000000000000'], // decimal string; bigints supported via ext-gmp ]); // 0xf3fef3a3000000…0006f05b59d3b20000 ``` Each argument is a `[type, value]` pair. Supported types: `address`, `uint8`, `uint24`, `uint256`, `bytes`, `string`. Dynamic types (`bytes`, `string`) are placed in the tail with the correct head offset, exactly as the ABI spec + ethers.js produce. ### Encode individual components [](#encode-individual-components) ``` AbiEncoder::encodeAddress('0xABCDEF…'); // left-padded to 32 bytes, lowercased AbiEncoder::encodeUint('0xFF'); // accepts hex or decimal; bigint-safe AbiEncoder::encodeUint('115792089237316195423570985008687907853269984665640564039457584007913129639935'); // max uint256 AbiEncoder::encodeBytes('0xdeadbeef'); // length word + right-padded data AbiEncoder::encodeBytes('v1', isString: true); // UTF-8 string as dynamic bytes ``` ### Scope [](#scope) Intentionally narrow — covers the head-only static types and top-level dynamic `bytes` / `string` that real EVM contract calls use. Nested dynamic types (`bytes[]`, `string[]`, dynamic tuples) are out of scope. Requirements ------------ [](#requirements) - PHP 8.3+ - `ext-gmp` - [amashukov/keccak-php](https://github.com/AndreyMashukov/keccak-php) (for the selector hash) Related packages ---------------- [](#related-packages) PackageTierPurpose[amashukov/keccak-php](https://github.com/AndreyMashukov/keccak-php)leafkeccak-256 hashing (selector hash)[amashukov/eip1559-tx-signer-php](https://github.com/AndreyMashukov/eip1559-tx-signer-php)compositeEIP-1559 raw tx assembly + signing[amashukov/rlp-php](https://github.com/AndreyMashukov/rlp-php)leafRLP encoding[amashukov/secp256k1-php](https://github.com/AndreyMashukov/secp256k1-php)leafECDSA sign / pubkey derivation[amashukov/eth-rpc-client-php](https://github.com/AndreyMashukov/eth-rpc-client-php)RPCEthereum JSON-RPC client[amashukov/eth-php](https://github.com/AndreyMashukov/eth-php)metaEVM umbrella packageQuality ------- [](#quality) - PHPStan level 9. - php-cs-fixer with the `@PER-CS` ruleset. - GitHub Actions CI on every push. - Byte-for-byte parity tests against ethers.js v6 `Interface.encodeFunctionData`. License ------- [](#license) MIT. ### Health Score 40 — FairBetter than 86% of packages Maintenance88 Actively maintained with recent releases Popularity16 Limited adoption so far Community10 Small or concentrated contributor base Maturity38 Early-stage or recently created project Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Unknown Total 1 Last Release 62d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/4b3e86ca79a82515b23e0239b1d3616c747e59b64c40e169d538d5c759c9bbc4?d=identicon)[Andrey Mashukov](/maintainers/Andrey%20Mashukov) --- Top Contributors [![AndreyMashukov](https://avatars.githubusercontent.com/u/24682497?v=4)](https://github.com/AndreyMashukov "AndreyMashukov (3 commits)") --- Tags abiblockchaincalldataethereumethersevmphpsolidityencodingethereumevmsolidityabicalldata ### Code Quality TestsPHPUnit Static AnalysisPHPStan, Rector Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/amashukov-abi-encoder-php/health.svg) ``` [![Health](https://phpackages.com/badges/amashukov-abi-encoder-php/health.svg)](https://phpackages.com/packages/amashukov-abi-encoder-php) ``` ### Alternatives [paragonie/constant_time_encoding Constant-time Implementations of RFC 4648 Encoding (Base-64, Base-32, Base-16) 902363.2M194](/packages/paragonie-constant-time-encoding)[paquettg/string-encode Facilitating the process of altering string encoding in PHP. 699.1M43](/packages/paquettg-string-encode)[onnov/detect-encoding Text encoding definition class instead of mb\_detect\_encoding. 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