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Example code of nalabdou/algebra-php

Informations about the package algebra-php

algebra-php

Pure PHP relational algebra engine.

JOIN · PIVOT · WINDOW · GROUP BY · 60+ operations · Zero framework dependency.

PHP

Why algebra-php?

You have two arrays from Doctrine, an API response, or a CSV file. You need to join them, group them, compute running totals, and build a pivot table — all in PHP, all in one readable pipeline.

Without algebra you write nested loops, multiple array_filter calls, manual aggregation, and bespoke pivot code spread across multiple methods. With algebra-php you write this:

Installation

Requires PHP 8.2+.

Quick start

All operations

Entry point

Joins

Set operations

Filter & projection

Grouping & aggregation

Window functions

Pivot

Sorting & slicing

Structural operations

Terminal operations

Expression language

String expressions use ExpressionLanguage. The row is exposed as item:

Built-in functions: length, lower, upper, trim, abs, round, contains.

Closures are always supported and run with zero ExpressionLanguage overhead:

Pipeline branching

Pipelines are immutable — pipe() always returns a new instance. Branch freely:

Query planner

The QueryPlanner automatically rewrites the declared operation order before execution. Filters are pushed before joins, redundant sorts eliminated, consecutive maps collapsed — without changing the result.

Inspect the plan:

Execution log

Every MaterializedCollection carries a per-operation execution log:

Custom aggregates

Custom adapters

Register in a custom CollectionFactory or use the framework bundles:

Parallel execution

Running the demos

Running tests

Architecture

Versioning

MAJOR.MINOR.FIX — Versioning follows this scheme:

License

MIT — Nadim Al Abdou

All versions of algebra-php with dependencies

PHP Build Version
Package Version
Requires php Version >=8.2
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