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msd2/myoos/vendor/php-ai/php-ml/src/Dataset/CsvDataset.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Phpml\Dataset;
+
+use Phpml\Exception\FileException;
+
+class CsvDataset extends ArrayDataset
+{
+    /**
+     * @var array
+     */
+    protected $columnNames = [];
+
+    /**
+     * @throws FileException
+     */
+    public function __construct(string $filepath, int $features, bool $headingRow = true, string $delimiter = ',', int $maxLineLength = 0)
+    {
+        if (!file_exists($filepath)) {
+            throw new FileException(sprintf('File "%s" missing.', basename($filepath)));
+        }
+
+        $handle = fopen($filepath, 'rb');
+        if ($handle === false) {
+            throw new FileException(sprintf('File "%s" can\'t be open.', basename($filepath)));
+        }
+
+        if ($headingRow) {
+            $data = fgetcsv($handle, $maxLineLength, $delimiter);
+            $this->columnNames = array_slice((array) $data, 0, $features);
+        } else {
+            $this->columnNames = range(0, $features - 1);
+        }
+
+        $samples = $targets = [];
+        while (($data = fgetcsv($handle, $maxLineLength, $delimiter)) !== false) {
+            $samples[] = array_slice((array) $data, 0, $features);
+            $targets[] = $data[$features];
+        }
+
+        fclose($handle);
+
+        parent::__construct($samples, $targets);
+    }
+
+    public function getColumnNames(): array
+    {
+        return $this->columnNames;
+    }
+}