文字コード判定と必須列のチェックまで

app/Exceptions/CsvImportException.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Exceptions;
+
+use Throwable;
+
+class CsvImportException extends \RuntimeException
+{
+    /** @var string[] */
+    private $errors;
+
+    /**
+     * CsvImportException constructor.
+     * @param string[] $errors
+     */
+    public function __construct(array $errors)
+    {
+        parent::__construct(array_first($errors));
+        $this->errors = $errors;
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getErrors(): array
+    {
+        return $this->errors;
+    }
+}