Merge pull request #7 from jobcloud/fix/PRO-698/strtolower-with-null-php81-deprecation

fix(PRO-698): fix null on strtolower PHP 8.1 deprecation

Author: haeber

lib/PHPPdf/Core/ColorPalette.php

@@ -1,41 +1,56 @@
-<?php
-
-/*
- * Copyright 2011 Piotr Śliwa <peter.pl7@gmail.com>
- *
- * License information is in LICENSE file
- */
-
-
-namespace PHPPdf\Core;
-
-/**
- * Color palette
- *
- * @author Piotr Śliwa <peter.pl7@gmail.com>
- */
-class ColorPalette
-{
-    private $colors;
-    
-    public function __construct(array $colors = array())
-    {
-        $this->colors = $colors;
-    }
-    
-    public function get($name)
-    {
-        $name = strtolower($name);
-        return isset($this->colors[$name]) ? $this->colors[$name] : $name;
-    }
-    
-    public function merge(array $colors)
-    {
-        $this->colors = $colors + $this->colors;
-    }
-    
-    public function getAll()
-    {
-        return $this->colors;
-    }
-}
+<?php
+
+/*
+ * Copyright 2011 Piotr Śliwa <peter.pl7@gmail.com>
+ *
+ * License information is in LICENSE file
+ */
+
+namespace PHPPdf\Core;
+
+/**
+ * Color palette
+ *
+ * @author Piotr Śliwa <peter.pl7@gmail.com>
+ */
+class ColorPalette
+{
+    /** @var array<string, string> */
+    private $colors;
+
+    /**
+     * @param array<string, string> $colors
+     */
+    public function __construct(array $colors = [])
+    {
+        $this->colors = $colors;
+    }
+
+    /**
+     * @param string|null $name
+     * @return string
+     */
+    public function get($name)
+    {
+        $name = strtolower((string) $name);
+
+        return isset($this->colors[$name]) ? $this->colors[$name] : $name;
+    }
+
+    /**
+     * @param array<string, string> $colors
+     * @return void
+     */
+    public function merge(array $colors)
+    {
+        $this->colors = $colors + $this->colors;
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function getAll()
+    {
+        return $this->colors;
+    }
+}