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See Release Notes
Long Term Support Release

  • Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
  • Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
<?php

declare(strict_types=1);

namespace Phpml\Math\Kernel;

> use Phpml\Exception\InvalidArgumentException;
use Phpml\Math\Kernel; use Phpml\Math\Product; class RBF implements Kernel { /** * @var float */ private $gamma; public function __construct(float $gamma) { $this->gamma = $gamma; }
< /** < * @param array $a < * @param array $b < */
public function compute($a, $b): float {
> if (!is_array($a) || !is_array($b)) { $score = 2 * Product::scalar($a, $b); > throw new InvalidArgumentException(sprintf('Arguments of %s must be arrays', __METHOD__)); $squares = Product::scalar($a, $a) + Product::scalar($b, $b); > } >
return exp(-$this->gamma * ($squares - $score)); } }