new remover "element by class by index"

src/Remove/ElementByClassByIndexRemover.php

@@ -0,0 +1,35 @@
+<?php
+
+
+namespace Pkscraper\Remove;
+
+
+use DOMXPath;
+use Pkscraper\Dom\Dom;
+
+class ElementByClassByIndexRemover extends Remover
+{
+
+    protected $class;
+    protected $index;
+
+    /**
+     * ElementByClassByIndexRemover constructor.
+     * @param string $class
+     * @param int $index
+     */
+    public function __construct($class, $index)
+    {
+        $this->class = $class;
+        $this->index = $index;
+    }
+
+    public function remove(): string
+    {
+        $dom = new Dom($this->document);
+        $xpath = new DOMXPath($dom->DOMDocument);
+        $elementsToBeRemove = $xpath->query('//*[contains(concat(" ", normalize-space(@class), " "), " ' . $this->class . ' ")]');
+        $elementsToBeRemove->item($this->index)->parentNode->removeChild($elementsToBeRemove->item($this->index));
+        return $dom->get();
+    }
+}

tests/ElementByClassByIndexRemoverTest.php

@@ -0,0 +1,28 @@
+<?php
+
+
+namespace Pkscraper\Tests;
+
+
+use PHPUnit\Framework\TestCase;
+use Pkscraper\Remove\ElementByClassByIndexRemover;
+
+class ElementByClassByIndexRemoverTest extends TestCase
+{
+
+    public function testRemove()
+    {
+        $remover = new ElementByClassByIndexRemover('column', 0);
+        $remover->setDocument(file_get_contents(__DIR__ . '/fixtures/htmlDocument.html'));
+        $result = $remover->remove();
+        $this->assertStringNotContainsString('first column', $result);
+        $this->assertStringContainsString('second column', $result);
+
+        $remover = new ElementByClassByIndexRemover('column', 1);
+        $remover->setDocument(file_get_contents(__DIR__ . '/fixtures/htmlDocument.html'));
+        $result = $remover->remove();
+        $this->assertStringContainsString('first column', $result);
+        $this->assertStringNotContainsString('second column', $result);
+    }
+
+}

tests/fixtures/htmlDocument.html

@@ -7,8 +7,9 @@
         color: blue;
     }
 </style>
-<div>
+<div class="column">
     <p style="color: red; font-family: Arial; font-size: 22px;">first paragraph content</p>
+    <p>first column</p>
     <span>
         span content
         <img id="example-image-first" width="121" height="3422" alt="test" src="http://www.example.com/image.jpg">
@@ -19,7 +20,8 @@
 <script>
     document.getElementById("demo").innerHTML = "Hello JavaScript!";
 </script>
-<div id="copy" style="font-size: 18px;" class="mt20 clearfix">\n
+<div id="copy" style="font-size: 18px;" class="mt20 clearfix column">\n
+    <p>second column</p>
     <p>
         Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
         standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make