draft neuralnet

Ai/NeuralNetwork/Neuron.php

@@ -0,0 +1,92 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   phpOMS\Ai\NeuralNetwork
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace phpOMS\Ai\NeuralNetwork;
+
+/**
+ * Neuron
+ *
+ * @package phpOMS\Ai\NeuralNetwork
+ * @license OMS License 1.0
+ * @link    https://orange-management.org
+ * @since   1.0.0
+ */
+class Neuron {
+    /**
+     * Neuron inputs
+     *
+     * @var array
+     * @since 1.0.0
+     */
+    private array $inputs = [];
+
+    /**
+     * Input weights
+     *
+     * @var array
+     * @since 1.0.0
+     */
+    private array $weights = [];
+
+    /**
+     * Bias
+     *
+     * @var float
+     * @since 1.0.0
+     */
+    public float $bias = 0;
+
+    /**
+     * Constructor.
+     *
+     * @param array $inputs  Neuron inputs/connections
+     * @param array $weights Input weights
+     * @param float $bias    Input bias
+     *
+     * @since 1.0.0
+     */
+    public function __construct(array $inputs = [], array $weights = [], float $bias = 0.0)
+    {
+        $this->inputs  = $inputs;
+        $this->weights = $weights;
+        $this->bias    = $bias;
+    }
+
+    public function addInput($input, float $weight)
+    {
+        $this->inputs[]  = $input;
+        $this->weights[] = $weight;
+    }
+
+    /**
+     * Create node output
+     *
+     * @return float
+     *
+     * @since 1.0.0
+     */
+    public function output() : float
+    {
+        $length = \count($this->intputs);
+        $output = 0.0;
+
+        for ($i = 0; $i < $length; ++$i) {
+            $output += $this->inputs[$i]->output() * $this->weights[$i];
+        }
+
+        return $output + $this->bias;
+
+        // return $this->activationFunction($output + $this->bias);
+    }
+}