PHPackages                             paragonie/iaso - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Parsing & Serialization](/categories/parsing)
4. /
5. paragonie/iaso

AbandonedArchivedLibrary[Parsing & Serialization](/categories/parsing)

paragonie/iaso
==============

Powerful JSON Toolkit, includes a JSON parser immune to Hash-DoS attacks

v0.1.0(9y ago)51166MITPHPPHP ^7

Since Mar 27Pushed 9y ago6 watchersCompare

[ Source](https://github.com/paragonie/iaso)[ Packagist](https://packagist.org/packages/paragonie/iaso)[ RSS](/packages/paragonie-iaso/feed)WikiDiscussions master Synced 1mo ago

READMEChangelog (1)Dependencies (4)Versions (2)Used By (0)

Iaso
====

[](#iaso)

[![Build Status](https://camo.githubusercontent.com/4513bf6b6fd29bc5108996348865b254e6875266f7453227227a54a88e7caae7/68747470733a2f2f7472617669732d63692e6f72672f70617261676f6e69652f6961736f2e7376673f6272616e63683d6d6173746572)](https://travis-ci.org/paragonie/iaso)[![Latest Stable Version](https://camo.githubusercontent.com/04b899d72dae0d3d7408ede6cddf8eea86535fb26be351a9d7b5d88fa1972a32/68747470733a2f2f706f7365722e707567782e6f72672f70617261676f6e69652f6961736f2f762f737461626c65)](https://packagist.org/packages/paragonie/iaso)[![Latest Unstable Version](https://camo.githubusercontent.com/309aad8078dcedbdc9e0dc9126a698b48f0455fa0637a1c3d89502fbf4453786/68747470733a2f2f706f7365722e707567782e6f72672f70617261676f6e69652f6961736f2f762f756e737461626c65)](https://packagist.org/packages/paragonie/iaso)[![License](https://camo.githubusercontent.com/2f3ba8030a15c460d07574b086e8b130d7354414e54f718b7d62eccda31b84ce/68747470733a2f2f706f7365722e707567782e6f72672f70617261676f6e69652f6961736f2f6c6963656e7365)](https://packagist.org/packages/paragonie/iaso)

Iaso is a powerful JSON toolkit for PHP 7+, intended for any organization that builds or consumes JSON-based APIs.

Iaso was developed by [Paragon Initiative Enterprises](http://paragonie.com) to allow projects to build APIs without being vulnerable to [hash-collision denial of service attacks from PHP's JSON functions](http://lukasmartinelli.ch/web/2014/11/17/php-dos-attack-revisited.html).

Features
--------

[](#features)

- HDoS resistant data structure (`ResultSet`)
- Basic JSON parser (returns `ResultSet` objects)
    - `Assoc` is a JSON object
    - `Ordered` is a JSON array

### Roadmap

[](#roadmap)

- Contract-enforced JSON parser
    - Allows strict types, data limits
    - Throws an exception if any violations are found

Usage Examples
--------------

[](#usage-examples)

### Simple JSON Parsing

[](#simple-json-parsing)

```
use ParagonIE\Iaso\JSON;
use ParagonIE\Iaso\ResultSet;

$data = JSON::parse($string);
var_dump($data instanceof ResultSet); /* bool(true) */
```

###  Health Score

28

—

LowBetter than 54% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity19

Limited adoption so far

Community12

Small or concentrated contributor base

Maturity53

Maturing project, gaining track record

 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

3331d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/05d241256cda885139a5697d3bb536b5cec3b430c1adb9c524bf92a37a55758d?d=identicon)[paragonie-scott](/maintainers/paragonie-scott)

---

Top Contributors

[![paragonie-security](https://avatars.githubusercontent.com/u/15914520?v=4)](https://github.com/paragonie-security "paragonie-security (9 commits)")

---

Tags

json

###  Code Quality

TestsPHPUnit

Static AnalysisPsalm

Type Coverage Yes

### Embed Badge

![Health badge](/badges/paragonie-iaso/health.svg)

```
[![Health](https://phpackages.com/badges/paragonie-iaso/health.svg)](https://phpackages.com/packages/paragonie-iaso)
```

###  Alternatives

[justinrainbow/json-schema

A library to validate a json schema.

3.6k316.9M609](/packages/justinrainbow-json-schema)[mtdowling/jmespath.php

Declaratively specify how to extract elements from a JSON document

2.0k472.8M135](/packages/mtdowling-jmespathphp)[jms/serializer

Library for (de-)serializing data of any complexity; supports XML, and JSON.

2.3k135.8M848](/packages/jms-serializer)[jms/serializer-bundle

Allows you to easily serialize, and deserialize data of any complexity

1.8k89.3M624](/packages/jms-serializer-bundle)[colinodell/json5

UTF-8 compatible JSON5 parser for PHP

30422.2M45](/packages/colinodell-json5)[clue/ndjson-react

Streaming newline-delimited JSON (NDJSON) parser and encoder for ReactPHP.

15267.7M16](/packages/clue-ndjson-react)

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)