init

vendor/workerman/validation/library/Rules/Image.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Rules;
+
+use finfo;
+use SplFileInfo;
+
+use function is_file;
+use function is_string;
+use function mb_strpos;
+
+use const FILEINFO_MIME_TYPE;
+
+/**
+ * Validates if the file is a valid image by checking its MIME type.
+ *
+ * @author Danilo Benevides <danilobenevides01@gmail.com>
+ * @author Guilherme Siani <guilherme@siani.com.br>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class Image extends AbstractRule
+{
+    /**
+     * @var finfo
+     */
+    private $fileInfo;
+
+    /**
+     * Initializes the rule.
+     */
+    public function __construct(?finfo $fileInfo = null)
+    {
+        $this->fileInfo = $fileInfo ?: new finfo(FILEINFO_MIME_TYPE);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if ($input instanceof SplFileInfo) {
+            return $this->validate($input->getPathname());
+        }
+
+        if (!is_string($input)) {
+            return false;
+        }
+
+        if (!is_file($input)) {
+            return false;
+        }
+
+        return mb_strpos((string) $this->fileInfo->file($input), 'image/') === 0;
+    }
+}