A port of the GLM library to the PHP language.
<?php
require 'vendor/autoload.php';
use glm\vec3;
use glm\mat4;
$matrix = new mat4; // 4x4 identity matrix
echo $matrix, PHP_EOL;
// Output: mat4x4((1.000000, 0.000000, 0.000000, 0.000000), (0.000000, 1.000000, 0.000000, 0.000000), (0.000000, 0.000000, 1.000000, 0.000000), (0.000000, 0.000000, 0.000000, 1.000000))
echo $matrix->scale(5), PHP_EOL;
// Output: mat4x4((5.000000, 0.000000, 0.000000, 0.000000), (0.000000, 5.000000, 0.000000, 0.000000), (0.000000, 0.000000, 5.000000, 0.000000), (0.000000, 0.000000, 0.000000, 1.000000))