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cline/ecma-regex
================

100% ECMA-262 compliant regular expression engine for PHP, designed for JSON Schema validation and full JavaScript regex compatibility

2.0.2(3mo ago)10MITPHPPHP ^8.5.0CI passing

Since Mar 4Pushed 3mo agoCompare

[ Source](https://github.com/faustbrian/ecma-regex)[ Packagist](https://packagist.org/packages/cline/ecma-regex)[ RSS](/packages/cline-ecma-regex/feed)WikiDiscussions 2.x Synced today

READMEChangelog (1)Dependencies (6)Versions (6)Used By (0)

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---

ecma-regex
==========

[](#ecma-regex)

A 100% ECMA-262 compliant regular expression engine for PHP, designed for JSON Schema validation and full JavaScript regex compatibility.

Why This Package?
-----------------

[](#why-this-package)

PHP uses PCRE (Perl Compatible Regular Expressions), while JSON Schema and JavaScript use ECMA-262 regex syntax. These engines have subtle differences that can cause validation inconsistencies. This package provides a pure PHP implementation of ECMA-262 regex, ensuring perfect compatibility with JSON Schema patterns.

Requirements
------------

[](#requirements)

> **Requires [PHP 8.5+](https://php.net/releases/)**

Installation
------------

[](#installation)

```
composer require cline/ecma-regex
```

Usage
-----

[](#usage)

See the [Getting Started](https://docs.cline.sh/ecma-regex/getting-started/) guide for usage examples and the [API Reference](https://docs.cline.sh/ecma-regex/api-reference/) for complete API documentation.

Documentation
-------------

[](#documentation)

Comprehensive documentation available at [docs.cline.sh](https://docs.cline.sh/ecma-regex/):

- **[Getting Started](https://docs.cline.sh/ecma-regex/getting-started/)** - Installation and basic usage
- **[Pattern Syntax](https://docs.cline.sh/ecma-regex/pattern-syntax/)** - Complete pattern reference
- **[API Reference](https://docs.cline.sh/ecma-regex/api-reference/)** - Full API documentation
- **[JSON Schema Integration](https://docs.cline.sh/ecma-regex/json-schema/)** - JSON Schema validation patterns
- **[Performance](https://docs.cline.sh/ecma-regex/performance/)** - Caching and optimization
- **[Architecture](https://docs.cline.sh/ecma-regex/architecture/)** - Internal design and structure
- **[Troubleshooting](https://docs.cline.sh/ecma-regex/troubleshooting/)** - Common issues and solutions

**External References:**

- [ECMA-262 Specification](https://tc39.es/ecma262/#sec-regexp-regular-expression-objects)
- [JSON Schema Regular Expressions](https://json-schema.org/understanding-json-schema/reference/regular_expressions)

Change log
----------

[](#change-log)

Please see [CHANGELOG](CHANGELOG.md) for more information on what has changed recently.

Contributing
------------

[](#contributing)

Please see [CONTRIBUTING](CONTRIBUTING.md) and [CODE\_OF\_CONDUCT](CODE_OF_CONDUCT.md) for details.

Security
--------

[](#security)

If you discover any security related issues, please use the [GitHub security reporting form](https://github.com/faustbrian/ecma-regex/security) rather than the issue queue.

Credits
-------

[](#credits)

- [Brian Faust](https://github.com/faustbrian)
- [All Contributors](../../contributors)

License
-------

[](#license)

The MIT License. Please see [License File](LICENSE.md) for more information.

###  Health Score

38

—

LowBetter than 83% of packages

Maintenance80

Actively maintained with recent releases

Popularity2

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity55

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

Every ~21 days

Total

5

Last Release

108d ago

Major Versions

1.0.0 → 2.0.02026-03-04

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/22145591?v=4)[Brian Faust](/maintainers/faustbrian)[@faustbrian](https://github.com/faustbrian)

---

Top Contributors

[![faustbrian](https://avatars.githubusercontent.com/u/22145591?v=4)](https://github.com/faustbrian "faustbrian (6 commits)")

---

Tags

phpjson-schemajavascriptregexregular expressionsecma-262

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