Fixed issue paquettg#93

Author: paquettg

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added new option `depthFirstSearch`.
 - Deprecated option `depthFirstSearch` and marked for removal in `3.0.0`.
 - Added multi class selections support.
+- Added case insensitive attribute matching
 
 ### Changed
 - Started using a changelog.

src/PHPHtmlParser/Dom/Tag.php

@@ -283,6 +283,7 @@ public function getAttributes()
      */
     public function getAttribute(string $key)
     {
+        $key = strtolower($key);
         if ( ! isset($this->attr[$key])) {
             return null;
         }

tests/DomTest.php

@@ -452,4 +452,24 @@ public function testFindDepthFirstSearch()
 
         $this->assertEquals('<img src="http://example.com/first.jpg" />', (string)$images[0]);
     }
+
+    public function testCaseInSensitivity()
+    {
+        $str = "<FooBar Attribute='asdf'>blah</FooBar>";
+        $dom = new Dom();
+        $dom->loadStr($str);
+
+        $FooBar = $dom->find('FooBar');
+        $this->assertEquals('asdf', $FooBar->attribute);
+    }
+
+    public function testCaseSensitivity()
+    {
+        $str = "<FooBar Attribute='asdf'>blah</FooBar>";
+        $dom = new Dom();
+        $dom->loadStr($str);
+
+        $FooBar = $dom->find('FooBar');
+        $this->assertEquals('asdf', $FooBar->Attribute);
+    }
 }