add set html function in html method

Author: Rct567

README.md

@@ -70,7 +70,7 @@ echo $links->get(-1)->textContent; // output 3
  #### Manipulation > DOM Insertion, Inside
 
 - `.text( [text] )`
-- `.html()`
+- `.html( [html_string] )`
 - `.append( [content], )`
 - `.prepend( [content], )`
 

src/Rct567/DomQuery/DomQuery.php

@@ -247,7 +247,7 @@ public function find(string $css_expression)
      * Get the combined text contents of each element in the set of matched elements, including their descendants,
      * or set the text contents of the matched elements.
      *
-     * @param string $val
+     * @param string|null $val
      *
      * @return self|string|void
      */
@@ -259,7 +259,7 @@ public function text($val=null)
                 $node->nodeValue = $val;
             }
 
-                return $this;
+            return $this;
         } else { // get value for first node
             if ($node = $this->getFirstElmNode()) {
                 return $node->nodeValue;
@@ -270,19 +270,29 @@ public function text($val=null)
     /**
      * Get the HTML contents of the first element in the set of matched elements
      *
-     * @return string
+     * @param string|null $html_string
+     *
+     * @return self|string|void
      */
-    public function html()
+    public function html($html_string=null)
     {
-        if ($node = $this->getFirstElmNode()) {
-            $html = '';
-            $document = $node->ownerDocument;
-
-            foreach ($node->childNodes as $node) {
-                $html .= $document->saveHTML($node);
+        if (!is_null($html_string)) { // set html for all nodes
+            foreach ($this as $node) {
+                $node->get(0)->nodeValue = '';
+                $node->append($html_string);
             }
+            return $this;
+        } else { // get html for first node
+            if ($node = $this->getFirstElmNode()) {
+                $html = '';
+                $document = $node->ownerDocument;
 
-            return $html;
+                foreach ($node->childNodes as $node) {
+                    $html .= $document->saveHTML($node);
+                }
+
+                return $html;
+            }
         }
     }
 

tests/Rct567/DomQuery/Tests/DomQueryTest.php

@@ -322,7 +322,7 @@ public function testFilter()
     }
 
     /*
-     * Test html
+     * Test get html
      */
     public function testGetHtml()
     {
@@ -332,6 +332,16 @@ public function testGetHtml()
         $this->assertEquals('A', $dom->find('a i')->html());
     }
 
+    /*
+     * Test set html
+     */
+    public function testSetHtml()
+    {
+        $dom = new Domquery('<p> <a>M<i>A</i></a> <span></span> </p>');
+        $dom->find('a')->html('<i>x</i>');
+        $this->assertEquals('<p> <a><i>x</i></a> <span></span> </p>', (string) $dom);
+    }
+
     /*
      * Test instance without nodes
      */