Fixed paquettg#190 - Added gzip detection and decoding.

Author: paquettg

composer.json

@@ -16,7 +16,9 @@
     "require": {
         "php": ">=7.1",
         "ext-mbstring": "*",
-        "paquettg/string-encode": "~1.0.0"
+        "paquettg/string-encode": "~1.0.0",
+        "ext-zlib": "*",
+        "ext-curl": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.5.1",

src/PHPHtmlParser/Dom.php

@@ -513,6 +513,11 @@ protected function clean(string $str): string
             return $str;
         }
 
+        $is_gzip = 0 === mb_strpos($str, "\x1f" . "\x8b" . "\x08", 0, "US-ASCII");
+        if ($is_gzip) {
+            $str = gzdecode($str);
+        }
+
         // remove white space before closing tags
         $str = mb_eregi_replace("'\s+>", "'>", $str);
         $str = mb_eregi_replace('"\s+>', '">', $str);