ext-collections

1. Introduction

This PHP extension provides a set of useful functional-style operations on PHP arrays, which makes array manipulation simple and scalable.

Method names and functionalities are inspired by Kotlin.Collections.

It may take me a really long time to fully implement this extension. Feel free to contribute.

2. Documentation

See stubs directory for signature of all classes and methods of this extension, with PHPDoc.

3. Example

Here is a simple example.

$employees = [
    ['name' => 'Alice', 'sex' => 'female', 'age' => 35],
    ['name' => 'Bob', 'sex' => 'male', 'age' => 29],
    ['name' => 'David', 'sex' => 'male', 'age' => 40],
    ['name' => 'Benjamin', 'sex' => 'male', 'age' => 32]
];
// Trying to get an array of names of male employees,
// sorted by the descending order of their age.
$names = Collection::init($employees)
    ->filter(function ($it) {
        return $it['sex'] == 'male';
    })
    ->sortedByDescending(function ($it) {
        return $it['age'];
    })
    ->map(function ($it) {
        return $it['name'];
    })
    ->toArray();
// You got $names == ['David', 'Benjamin', 'Bob'].