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slava-vishnyakov/map-reduce
===========================

MapReduce implementation

1.0.3(8y ago)018MITPHP

Since Apr 17Pushed 8y agoCompare

[ Source](https://github.com/slava-vishnyakov/php-map-reduce)[ Packagist](https://packagist.org/packages/slava-vishnyakov/map-reduce)[ RSS](/packages/slava-vishnyakov-map-reduce/feed)WikiDiscussions master Synced 2mo ago

READMEChangelogDependencies (1)Versions (7)Used By (0)

To install:

```
composer require slava-vishnyakov/map-reduce

```

```
use \SlavaVishnyakov\MapReduce\MapReduceMemory;

$m = new MapReduceMemory(); // or MapReduceProcess
$m->send('a', 1);
$m->send('b', 1);
$m->send('a', 2);

foreach($m->iter() as $key => $groups) {
// yields
$key = 'a', $groups = [1,2]
$key = 'b', $groups = [1]
```

Also can be done via next() calls:

```
$m = new MapReduceMemory(); // or MapReduceProcess
$m->send('a', 1);
$m->send('b', 1);
$m->send('a', 2);
$m->send('a', new stdClass);

$m->next() ==> ['a', [1, 2, new stdClass]]
$m->next() ==> ['b', [1]]
$m->next() ==> null
```

There are two implementations `MapReduceMemory` and `MapReduceProcess`.

The first does all sorting in memory, the second is for memory-hungry workloads, uses `/usr/bin/sort` to process basically unlimited amount of data.

###  Health Score

28

—

LowBetter than 54% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity6

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity67

Established project with proven stability

 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 ~0 days

Total

6

Last Release

2944d ago

Major Versions

0.2 → 1.02018-04-17

### Community

Maintainers

![](https://www.gravatar.com/avatar/9fe3ffd1a2a15375a6cede03c09170a80bb6fdda4fa0afd4b1b57d4a80b4d8c5?d=identicon)[slava-vishnyakov](/maintainers/slava-vishnyakov)

---

Top Contributors

[![slava-vishnyakov](https://avatars.githubusercontent.com/u/817931?v=4)](https://github.com/slava-vishnyakov "slava-vishnyakov (13 commits)")

---

Tags

map-reducemapreducephp

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/slava-vishnyakov-map-reduce/health.svg)

```
[![Health](https://phpackages.com/badges/slava-vishnyakov-map-reduce/health.svg)](https://phpackages.com/packages/slava-vishnyakov-map-reduce)
```

###  Alternatives

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A streams library for PHP based on the Java 8 Streams API.

883.2k](/packages/bertptrs-phpstreams)[cheprasov/php-parallel

The class allows you to run multiple operations parallel in different processes and send results to the main process. Useful if you need to run multiple independent operations simultaneously, instead of sequential execution, or if you run several independent queries, for example, queries to different data bases

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