This package is abandoned and no longer maintained. No replacement package was suggested.

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

v0.1.0 2017-03-27 05:21 UTC

This package is auto-updated.

Last update: 2022-02-01 13:06:20 UTC


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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 to allow projects to build APIs without being vulnerable to hash-collision denial of service attacks from PHP's JSON functions.


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


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

Usage Examples

Simple JSON Parsing

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

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