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zef-dev/zef-expression-language
===============================

A JUEL like extension for Symfony Expression Language

1.4.1(5mo ago)41.5k2[1 issues](https://github.com/zef-dev/zef-expression-language/issues)1MITPHPPHP ^7.2.5CI failing

Since Sep 19Pushed 5mo ago4 watchersCompare

[ Source](https://github.com/zef-dev/zef-expression-language)[ Packagist](https://packagist.org/packages/zef-dev/zef-expression-language)[ Docs](https://github.com/zef-dev/zef-expression-language)[ RSS](/packages/zef-dev-zef-expression-language/feed)WikiDiscussions master Synced 1w ago

READMEChangelog (9)Dependencies (4)Versions (14)Used By (1)

ZEF Expression Language
=======================

[](#zef-expression-language)

A simple extension to the [Symfony Expression Language](https://github.com/symfony/expression-language) which enables more [JUEL](http://juel.sourceforge.net) like behaviour.

- it will not break on non existing values - it will evaluate to `null`
- it enables you to use JUEL style accessing to array values and object methods (dot notation)

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

[](#installation)

```
# With composer
$ composer require zef-dev/zef-expression-language
```

Usage
-----

[](#usage)

Just replace Symfony `ExpressionLanguage` with the Zef one.

```
use Zef\Zel\Symfony\ExpressionLanguage;

$expressionLanguage =   new ExpressionLanguage();
$evaluated          =   $expressionLanguage->evaluate( 'true', []);

// will not throw an exception any more
$evaluated          =   $expressionLanguage->evaluate( 'myvar', []);
$evaluated          =   $expressionLanguage->evaluate( 'myvar[\'myfield\']', ['myvar'=>[]]);
```

JUEL like usage
---------------

[](#juel-like-usage)

To gain JUEL like evaluation addon, wrap your values array in `ArrayResolver`.

```
use Zef\Zel\Symfony\ExpressionLanguage;
use Zef\Zel\ArrayResolver;

$expressionLanguage =   new ExpressionLanguage();
$resolver           =   new ArrayResolver([]);
$evaluated          =   $expressionLanguage->evaluate( 'true', $resolver->getValues());

// now you can access array fields in dot notation
$resolver           =   new ArrayResolver(['myvar'=>['myfield'=>true]]);
$evaluated          =   $expressionLanguage->evaluate( 'myvar.myfield', $resolver->getValues());

// now you can access getters in a shorter way
$obj    =   new Myclass();
$obj->getName();
$obj->isValid();
$obj->hasErrror();

$resolver           =   new ArrayResolver(['myvar'=>$obj]);
$evaluated          =   $expressionLanguage->evaluate( 'myvar.name', $resolver->getValues());
$evaluated          =   $expressionLanguage->evaluate( 'myvar.valid', $resolver->getValues());
$evaluated          =   $expressionLanguage->evaluate( 'myvar.error', $resolver->getValues());

```

Note about implementation
-------------------------

[](#note-about-implementation)

We wanted to extend Symfony classes and override just what was necessary, but as the original classes were not written in a manner to allow it easily, we ended up copy/pasting some classes completely just to be able implement few minor modifications.

---

This package is created based on the [PHP Boilerplate](https://github.com/kreait/php-boilerplate)

###  Health Score

42

—

FairBetter than 90% of packages

Maintenance65

Regular maintenance activity

Popularity21

Limited adoption so far

Community16

Small or concentrated contributor base

Maturity57

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 84.3% 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 ~211 days

Recently: every ~233 days

Total

10

Last Release

169d ago

PHP version history (2 changes)1.0.0PHP ^7.2

1.1.0PHP ^7.2.5

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/71453096?v=4)[ZEF Development](/maintainers/zef-dev)[@zef-dev](https://github.com/zef-dev)

---

Top Contributors

[![tolecar](https://avatars.githubusercontent.com/u/2013455?v=4)](https://github.com/tolecar "tolecar (59 commits)")[![Tefached95](https://avatars.githubusercontent.com/u/17346375?v=4)](https://github.com/Tefached95 "Tefached95 (7 commits)")[![mmarcec007](https://avatars.githubusercontent.com/u/10289178?v=4)](https://github.com/mmarcec007 "mmarcec007 (4 commits)")

---

Tags

symfonyexpression-language

###  Code Quality

TestsPHPUnit

Code StylePHP CS Fixer

### Embed Badge

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```
[![Health](https://phpackages.com/badges/zef-dev-zef-expression-language/health.svg)](https://phpackages.com/packages/zef-dev-zef-expression-language)
```

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