From 1ec3d8be5341182f7cd78b5f3fa75b6b20c0c162 Mon Sep 17 00:00:00 2001
From: ignace nyamagana butera <nyamsprod@gmail.com>
Date: Sat, 25 Jan 2025 15:02:31 +0100
Subject: [PATCH] Improve codebase and simplify named constructor

---
 interfaces/IPv4/Converter.php | 10 +++++--
 phpstan.neon                  |  1 +
 uri/Uri.php                   | 52 +++++++++++++++++++++--------------
 3 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/interfaces/IPv4/Converter.php b/interfaces/IPv4/Converter.php
index 71c0bb9f..63e9ab43 100644
--- a/interfaces/IPv4/Converter.php
+++ b/interfaces/IPv4/Converter.php
@@ -21,6 +21,8 @@
 use function count;
 use function explode;
 use function extension_loaded;
+use function hexdec;
+use function long2ip;
 use function ltrim;
 use function preg_match;
 use function str_ends_with;
@@ -125,9 +127,13 @@ public function isIpv4(Stringable|string|null $host): bool
         }
 
         $hexParts = explode(':', substr($ipAddress, 5, 9));
+        if (count($hexParts) < 2) {
+            return false;
+        }
+
+        $ipAddress = long2ip((int) hexdec($hexParts[0]) * 65536 + (int) hexdec($hexParts[1]));
 
-        return count($hexParts) > 1
-            && false !== long2ip((int) hexdec($hexParts[0]) * 65536 + (int) hexdec($hexParts[1]));
+        return '' !== $ipAddress && false !== $ipAddress;
     }
 
     public function toIPv6Using6to4(Stringable|string|null $host): ?string
diff --git a/phpstan.neon b/phpstan.neon
index 5e790c3a..837423f5 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -22,5 +22,6 @@ parameters:
 		  path: components/Modifier.php
 		- '#Attribute class Deprecated does not exist.#'
 		- '#deprecated class League\\Uri\\BaseUri#'
+		- '#\Dom\\HTMLDocument#'
 	reportUnmatchedIgnoredErrors: true
 	treatPhpDocTypesAsCertain: false
diff --git a/uri/Uri.php b/uri/Uri.php
index 24a7a008..eaa272a1 100644
--- a/uri/Uri.php
+++ b/uri/Uri.php
@@ -740,27 +740,7 @@ public static function fromMarkdownAnchor(Stringable|string $markdown, Stringabl
      */
     public static function fromHtmlAnchor(Stringable|string $html, Stringable|string|null $baseUri = null): self
     {
-        FeatureDetection::supportsDom();
-        $html = (string) $html;
-        set_error_handler(fn (int $errno, string $errstr, string $errfile, int $errline) => true);
-        try {
-            $result = true;
-            $exception = null;
-            if (class_exists(HTMLDocument::class)) {
-                $dom = HTMLDocument::createFromString($html);
-            } else {
-                $dom = new DOMDocument();
-                $result = $dom->loadHTML($html);
-            }
-        } catch (Throwable $exception) {
-            $result = false;
-            $dom = null;
-        }
-        restore_error_handler();
-        if (false === $result || null === $dom) {
-            throw $exception ?? new DOMException('The content could not be parsed as a valid HTML content.');
-        }
-
+        $dom = self::loadDom($html);
         $element = $dom->getElementsByTagName('a')->item(0);
         if (null === $element) {
             throw new DOMException('No anchor element was found in the content.');
@@ -778,6 +758,36 @@ public static function fromHtmlAnchor(Stringable|string $html, Stringable|string
         };
     }
 
+    /**
+     * @throws DOMException
+     * @throws Throwable
+     */
+    private static function loadDom(Stringable|string $html): DOMDocument|HTMLDocument
+    {
+        FeatureDetection::supportsDom();
+
+        $html = (string) $html;
+        if (class_exists(HTMLDocument::class)) {
+            try {
+                set_error_handler(fn (int $errno, string $errstr, string $errfile, int $errline) => true);
+
+                return HTMLDocument::createFromString($html);
+            } finally {
+                restore_error_handler();
+            }
+        }
+
+        set_error_handler(fn (int $errno, string $errstr, string $errfile, int $errline) => true);
+        $dom = new DOMDocument();
+        $result = $dom->loadHTML($html);
+        restore_error_handler();
+        if (false === $result) {
+            throw new DOMException('The content could not be parsed as a valid HTML content.');
+        }
+
+        return $dom;
+    }
+
     /**
      * Returns the environment scheme.
      */