samsonasik/array-lookup

A fast lookup library that help you verify and search array and Traversable data

2.5.0 2026-02-19 15:37 UTC

Requires

• php: ^8.2
• webmozart/assert: ^1.11 || ^2.1

Requires (Dev)

• laminas/laminas-coding-standard: ^3.0
• phpstan/phpstan: ^2.0
• phpstan/phpstan-webmozart-assert: ^2.0
• phpunit/phpunit: ^11.0
• rector/rector: dev-main

MIT

• Abdul Malik Ikhsan

• spl
• search
• filter
• array
• collector
• fast
• finder
• lookup
• traversable
• iterable

README

Introduction

ArrayLookup is a fast lookup library that help you verify and search array and Traversable data.

Features

• Verify at least times: once(), twice(), times()
• Verify at most times: once(), twice(), times()
• Verify exact times: once(), twice(), times()
• Verify in interval range: isInclusiveOf(), isExclusiveOf()
• Verify all or none match: match(), none()
• Search data: first(), last(), rows(), partition()
• Collect data with filter and transform

Installation

Require this library uses composer.

composer require samsonasik/array-lookup

Usage

A. AtLeast

1. AtLeast::once()

It verify that data has filtered found item at least once.

use ArrayLookup\AtLeast;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 1;

var_dump(AtLeast::once($data, $filter)) // true

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 4;

var_dump(AtLeast::once($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [1, 2, 3];
$filter = static fn($datum, $key): bool => $datum === 1 && $key >= 0;

var_dump(AtLeast::once($data, $filter)) // true

$data = [1, 2, 3];
$filter = static fn($datum, $key): bool => $datum === 4 && $key >= 0;

var_dump(AtLeast::once($data, $filter)) // false

2. AtLeast::twice()

It verify that data has filtered found items at least twice.

use ArrayLookup\AtLeast;

$data = [1, "1", 3];
$filter = static fn($datum): bool => $datum == 1;

var_dump(AtLeast::twice($data, $filter)) // true

$data = [1, "1", 3];
$filter = static fn($datum): bool => $datum === 1;

var_dump(AtLeast::twice($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [1, "1", 3];
$filter = static fn($datum, $key): bool => $datum == 1 && $key >= 0;

var_dump(AtLeast::twice($data, $filter)) // true

$data = [1, "1", 3];
$filter = static fn($datum, $key): bool => $datum === 1 && $key >= 0;

var_dump(AtLeast::twice($data, $filter)) // false

3. AtLeast::times()

It verify that data has filtered found items at least times passed in 3rd arg.

use ArrayLookup\AtLeast;

$data = [false, null, 0];
$filter = static fn($datum): bool => ! $datum;
$times = 3;

var_dump(AtLeast::times($data, $filter, $times)) // true

$data = [1, null, 0];
$filter = static fn($datum): bool => ! $datum;
$times = 3;

var_dump(AtLeast::times($data, $filter, $times)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [false, null, 0];
$filter = static fn($datum, $key): bool => ! $datum && $key >= 0;
$times = 3;

var_dump(AtLeast::times($data, $filter, $times)) // true

$data = [1, null, 0];
$filter = static fn($datum, $key): bool => ! $datum && $key >= 0;
$times = 3;

var_dump(AtLeast::times($data, $filter, $times)) // false

B. AtMost

1. AtMost::once()

It verify that data has filtered found item at most once.

use ArrayLookup\AtMost;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 1;

var_dump(AtMost::once($data, $filter)) // true

$data = [1, "1", 3];
$filter = static fn($datum): bool => $datum == 1;

var_dump(AtMost::once($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = ['abc', 'def', 'some test'];
$filter = static fn(string $datum, int $key): bool => $datum === 'def' && $key === 1;

var_dump(AtMost::once($data, $filter)) // true

$data = ['abc', 'def', 'some test'];
$filter = static fn(string $datum, int $key): bool => $key > 0;

var_dump(AtMost::once($data, $filter)) // false

2. AtMost::twice()

It verify that data has filtered found items at most twice.

use ArrayLookup\AtMost;

$data = [1, "1", 2];
$filter = static fn($datum): bool => $datum == 1;

var_dump(AtMost::twice($data, $filter)) // true

$data = [1, "1", 2, 1];
$filter = static fn($datum): bool => $datum == 1;

var_dump(AtMost::twice($data, $filter)) // false

3. AtMost::times()

It verify that data has filtered found items at most times passed in 3rd arg.

use ArrayLookup\AtMost;

$data = [false, null, 0];
$filter = static fn($datum): bool => ! $datum;
$times = 3;

var_dump(AtMost::times($data, $filter, $times)) // true

$data = [false, null, 0, 0];
$filter = static fn($datum): bool => ! $datum;
$times = 3;

var_dump(AtMost::times($data, $filter, $times)) // false

C. Only

1. Only::once()

It verify that data has filtered found item exactly found only once.

use ArrayLookup\Only;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 1;

var_dump(Only::once($data, $filter)) // true


$data = [1, "1", 3]
$filter = static fn($datum): bool => $datum == 1;

var_dump(Only::once($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [1, 2, 3];
$filter = static fn($datum, $key): bool => $datum === 1 && $key >= 0;

var_dump(Only::once($data, $filter)) // true


$data = [1, "1", 3]
$filter = static fn($datum, $key): bool => $datum == 1  && $key >= 0;

var_dump(Only::once($data, $filter)) // false

2. Only::twice()

It verify that data has filtered found items exactly found only twice.

use ArrayLookup\Only;

$data = [1, "1", 3];
$filter = static fn($datum): bool => $datum == 1;

var_dump(Only::twice($data, $filter)) // true

$data = [true, 1, new stdClass()];
$filter = static fn($datum): bool => (bool) $datum;

var_dump(Only::twice($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [1, "1", 3];
$filter = static fn($datum, $key): bool => $datum == 1 && $key >= 0;

var_dump(Only::twice($data, $filter)) // true

$data = [true, 1, new stdClass()];
$filter = static fn($datum, $key): bool => (bool) $datum && $key >= 0;

var_dump(Only::twice($data, $filter)) // false

3. Only::times()

It verify that data has filtered found items exactly found only same with times passed in 3rd arg.

use ArrayLookup\Only;

$data = [false, null, 1];
$filter = static fn($datum): bool => ! $datum;
$times = 2;

var_dump(Only::times($data, $filter, $times)) // true


$data = [false, null, 0];
$filter = static fn($datum): bool => ! $datum;
$times = 2;

var_dump(Only::times($data, $filter, $times)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = [false, null, 1];
$filter = static fn($datum, $key): bool => ! $datum && $key >= 0;
$times = 2;

var_dump(Only::times($data, $filter, $times)) // true


$data = [false, null, 0];
$filter = static fn($datum, $key): bool => ! $datum && $key >= 0;
$times = 2;

var_dump(Only::times($data, $filter, $times)) // false

D. Interval

1. Interval::isInclusiveOf()

It verify that data has filtered found items within min and max (inclusive).

use ArrayLookup\Interval;

$orders = [
    ['status' => 'paid'],
    ['status' => 'paid'],
    ['status' => 'pending'],
    ['status' => 'paid'],
];

$filter = static fn(array $order): bool => $order['status'] === 'paid';

// inclusive means min and max boundaries are allowed
var_dump(Interval::isInclusiveOf($orders, $filter, 3, 5)) // true
var_dump(Interval::isInclusiveOf($orders, $filter, 2, 5)) // true

2. Interval::isExclusiveOf()

It verify that data has filtered found items between min and max (exclusive).

use ArrayLookup\Interval;

$orders = [
    ['status' => 'paid'],
    ['status' => 'paid'],
    ['status' => 'pending'],
    ['status' => 'paid'],
];

$filter = static fn(array $order): bool => $order['status'] === 'paid';

// exclusive means strictly between min and max
var_dump(Interval::isExclusiveOf($orders, $filter, 3, 5)) // false
var_dump(Interval::isExclusiveOf($orders, $filter, 2, 5)) // true

E. All

1. All::match()

It verify that all items match the filter and data is non-empty.

use ArrayLookup\All;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum > 0;

var_dump(All::match($data, $filter)) // true

$data = [1, 0, 3];
$filter = static fn($datum): bool => $datum > 0;

var_dump(All::match($data, $filter)) // false

$data = [];
$filter = static fn($datum): bool => $datum !== null;

var_dump(All::match($data, $filter)) // false

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = ['abc', 'def'];
$filter = static fn($datum, $key): bool => $datum !== '' && $key >= 0;

var_dump(All::match($data, $filter)) // true

2. All::none()

It verify that no items match the filter (empty data returns true).

use ArrayLookup\All;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 4;

var_dump(All::none($data, $filter)) // true

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 2;

var_dump(All::none($data, $filter)) // false

$data = [];
$filter = static fn($datum): bool => $datum !== null;

var_dump(All::none($data, $filter)) // true

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$data = ['abc', 'def'];
$filter = static fn($datum, $key): bool => $key === 0 && $datum === 'abc';

var_dump(All::none($data, $filter)) // false

F. Finder

1. Finder::first()

It search first data filtered found.

use ArrayLookup\Finder;

$data = [1, 2, 3];
$filter = static fn($datum): bool => $datum === 1;

var_dump(Finder::first($data, $filter)) // 1

$filter = static fn($datum): bool => $datum == 1000;
var_dump(Finder::first($data, $filter)) // null

// RETURN the Array key, pass true to 3rd arg

$filter = static fn($datum): bool => $datum === 1;

var_dump(Finder::first($data, $filter, true)) // 0

$filter = static fn($datum): bool => $datum == 1000;
var_dump(Finder::first($data, $filter, true)) // null

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

$filter = static fn($datum, $key): bool => $datum === 1 && $key >= 0;

var_dump(Finder::first($data, $filter)) // 1

$filter = static fn($datum, $key): bool => $datum == 1000 && $key >= 0;
var_dump(Finder::first($data, $filter)) // null

2. Finder::last()

It search last data filtered found.

use ArrayLookup\Finder;

$data = [6, 7, 8, 9];
var_dump(Finder::last(
    $data,
    static fn ($datum): bool => $datum > 5
)); // 9

var_dump(Finder::last(
    $data,
    static fn ($datum): bool => $datum < 5
)); // null

// RETURN the Array key, pass true to 3rd arg

// ... with PRESERVE original key
var_dump(Finder::last(
    $data,
    static fn ($datum): bool => $datum > 5,
    true
)); // 3

// ... with RESORT key, first key is last record
var_dump(Finder::last(
    $data,
    static fn ($datum): bool => $datum > 5,
    true,
    false
)); // 0

var_dump(Finder::last(
    $data,
    static fn ($datum): bool => $datum < 5,
    true
)); // null

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter

var_dump(Finder::last(
    $data,
    static fn ($datum, $key): bool => $datum > 5 && $key >= 0
)); // 9

var_dump(Finder::last(
    $data,
    static fn ($datum, $key): bool => $datum < 5 && $key >= 0
)); // null

3. Finder::rows()

It get rows data filtered found.

use ArrayLookup\Finder;

$data = [6, 7, 8, 9];
var_dump(Finder::rows(
    $data,
    static fn($datum): bool => $datum > 6
)); // [7, 8, 9]

var_dump(Finder::rows(
    $data,
    static fn ($datum): bool => $datum < 5
)); // []

// ... with PRESERVE original key
var_dump(Finder::rows(
    $data,
    static fn ($datum): bool => $datum > 6,
    true
)); // [1 => 7, 2 => 8, 3 => 9]

var_dump(Finder::rows(
    $data,
    static fn ($datum): bool => $datum < 5,
    true
)); // []

// WITH key array included, pass $key variable as 2nd arg on  filter to be used in filter
var_dump(Finder::rows(
    $data,
    static fn($datum, $key): bool => $datum > 6 && $key > 1
)); // [8, 9]


// WITH gather only limited found data
$data = [1, 2];
$filter = static fn($datum): bool => $datum >= 0;
$limit = 1;

var_dump(
    Finder::rows($data, $filter, limit: $limit)
); // [1]

4. Finder::partition()

It splits data into two arrays: matching and non-matching items based on a filter.

use ArrayLookup\Finder;

// Basic partition - split numbers into greater than 5 and not
$data = [1, 6, 3, 8, 4, 9];
$filter = static fn($datum): bool => $datum > 5;

[$matching, $notMatching] = Finder::partition($data, $filter);

var_dump($matching);    // [6, 8, 9]
var_dump($notMatching); // [1, 3, 4]

// Partition with preserved keys
[$matching, $notMatching] = Finder::partition($data, $filter, preserveKey: true);

var_dump($matching);    // [1 => 6, 3 => 8, 5 => 9]
var_dump($notMatching); // [0 => 1, 2 => 3, 4 => 4]

// Using the array key inside the filter
$data = [10, 20, 30, 40];
$keyFilter = static fn($datum, $key): bool => $key % 2 === 0;

[$even, $odd] = Finder::partition($data, $keyFilter, preserveKey: true);

var_dump($even); // [0 => 10, 2 => 30]
var_dump($odd);  // [1 => 20, 3 => 40]

G. Collector

It collect filtered data, with new transformed each data found:

Before

$newArray = [];

foreach ($data as $datum) {
    if (is_string($datum)) {
        $newArray[] = trim($datum);
    }
}

After

use ArrayLookup\Collector;

$when = fn ($datum): bool => is_string($datum);
$limit = 2;
$transform = fn ($datum): string => trim($datum);

$newArray = Collector::setUp($data)
       ->when($when) // optional, can just transform without filtering
       ->withLimit(2) // optional to only collect some data provided by limit config
       ->withTransform($transform)
       ->getResults();