diff --git a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-button.php b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-button.php
index 2f6fd1e883..420cfd720c 100644
--- a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-button.php
+++ b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-button.php
@@ -86,14 +86,14 @@ class Button extends Abstract_Block_Renderer {
 		}
 
 		$dom_helper      = new Dom_Document_Helper( $parsed_block['innerHTML'] );
-		$block_classname = $dom_helper->getAttributeValueByTagName( 'div', 'class' ) ?? '';
-		$button_link     = $dom_helper->findElement( 'a' );
+		$block_classname = $dom_helper->get_attribute_value_by_tag_name( 'div', 'class' ) ?? '';
+		$button_link     = $dom_helper->find_element( 'a' );
 
 		if ( ! $button_link ) {
 			return '';
 		}
 
-		$button_text = $dom_helper->getElementInnerHTML( $button_link ) ? $dom_helper->getElementInnerHTML( $button_link ) : '';
+		$button_text = $dom_helper->get_element_inner_html( $button_link ) ? $dom_helper->get_element_inner_html( $button_link ) : '';
 		$button_url  = $button_link->getAttribute( 'href' ) ? $button_link->getAttribute( 'href' ) : '#';
 
 		$block_attributes = wp_parse_args(
diff --git a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-column.php b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-column.php
index 9556990bca..80e7af888b 100644
--- a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-column.php
+++ b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-column.php
@@ -56,7 +56,7 @@ class Column extends Abstract_Block_Renderer {
 	 * @param Settings_Controller $settings_controller Settings controller.
 	 */
 	private function get_block_wrapper( string $block_content, array $parsed_block, Settings_Controller $settings_controller ): string {
-		$original_wrapper_classname = ( new Dom_Document_Helper( $block_content ) )->getAttributeValueByTagName( 'div', 'class' ) ?? '';
+		$original_wrapper_classname = ( new Dom_Document_Helper( $block_content ) )->get_attribute_value_by_tag_name( 'div', 'class' ) ?? '';
 		$block_attributes           = wp_parse_args(
 			$parsed_block['attrs'] ?? array(),
 			array(
diff --git a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-columns.php b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-columns.php
index 65a76132c6..e9c2ebc248 100644
--- a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-columns.php
+++ b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-columns.php
@@ -45,7 +45,7 @@ class Columns extends Abstract_Block_Renderer {
 	 * @param Settings_Controller $settings_controller Settings controller.
 	 */
 	private function getBlockWrapper( string $block_content, array $parsed_block, Settings_Controller $settings_controller ): string {
-		$original_wrapper_classname = ( new Dom_Document_Helper( $block_content ) )->getAttributeValueByTagName( 'div', 'class' ) ?? '';
+		$original_wrapper_classname = ( new Dom_Document_Helper( $block_content ) )->get_attribute_value_by_tag_name( 'div', 'class' ) ?? '';
 		$block_attributes           = wp_parse_args(
 			$parsed_block['attrs'] ?? array(),
 			array(
diff --git a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-group.php b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-group.php
index 2c9e65f459..e1ef8c860d 100644
--- a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-group.php
+++ b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-group.php
@@ -47,7 +47,7 @@ class Group extends Abstract_Block_Renderer {
 	 * @param Settings_Controller $settings_controller Settings controller.
 	 */
 	private function get_block_wrapper( string $block_content, array $parsed_block, Settings_Controller $settings_controller ): string {
-		$original_classname = ( new Dom_Document_Helper( $block_content ) )->getAttributeValueByTagName( 'div', 'class' ) ?? '';
+		$original_classname = ( new Dom_Document_Helper( $block_content ) )->get_attribute_value_by_tag_name( 'div', 'class' ) ?? '';
 		$block_attributes   = wp_parse_args(
 			$parsed_block['attrs'] ?? array(),
 			array(
diff --git a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-image.php b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-image.php
index 74367c78da..54ce278bb3 100644
--- a/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-image.php
+++ b/packages/php/email-editor/src/Integrations/Core/Renderer/Blocks/class-image.php
@@ -320,21 +320,21 @@ class Image extends Abstract_Block_Renderer {
 
 		$dom_helper = new Dom_Document_Helper( $block_content );
 
-		$figure_tag = $dom_helper->findElement( 'figure' );
+		$figure_tag = $dom_helper->find_element( 'figure' );
 		if ( ! $figure_tag ) {
 			return null;
 		}
 
-		$img_tag = $dom_helper->findElement( 'img' );
+		$img_tag = $dom_helper->find_element( 'img' );
 		if ( ! $img_tag ) {
 			return null;
 		}
 
-		$image_src       = $dom_helper->getAttributeValue( $img_tag, 'src' );
-		$image_class     = $dom_helper->getAttributeValue( $img_tag, 'class' );
-		$image_html      = $dom_helper->getOuterHtml( $img_tag );
-		$figcaption      = $dom_helper->findElement( 'figcaption' );
-		$figcaption_html = $figcaption ? $dom_helper->getOuterHtml( $figcaption ) : '';
+		$image_src       = $dom_helper->get_attribute_value( $img_tag, 'src' );
+		$image_class     = $dom_helper->get_attribute_value( $img_tag, 'class' );
+		$image_html      = $dom_helper->get_outer_html( $img_tag );
+		$figcaption      = $dom_helper->find_element( 'figcaption' );
+		$figcaption_html = $figcaption ? $dom_helper->get_outer_html( $figcaption ) : '';
 		$figcaption_html = str_replace( array( '<figcaption', '</figcaption>' ), array( '<span', '</span>' ), $figcaption_html );
 
 		return array(
diff --git a/packages/php/email-editor/src/Integrations/Utils/class-dom-document-helper.php b/packages/php/email-editor/src/Integrations/Utils/class-dom-document-helper.php
index 5fd8aa9802..47271d8a3f 100644
--- a/packages/php/email-editor/src/Integrations/Utils/class-dom-document-helper.php
+++ b/packages/php/email-editor/src/Integrations/Utils/class-dom-document-helper.php
@@ -1,62 +1,105 @@
-<?php declare(strict_types = 1);
+<?php
+/**
+ * This file is part of the MailPoet plugin.
+ *
+ * @package MailPoet\EmailEditor
+ */
 
+declare( strict_types = 1 );
 namespace MailPoet\EmailEditor\Integrations\Utils;
 
 /**
  * This class should guarantee that our work with the DOMDocument is unified and safe.
  */
 class Dom_Document_Helper {
+	/**
+	 * Instance of the DOMDocument.
+	 *
+	 * @var \DOMDocument
+	 */
 	private \DOMDocument $dom;
 
-	public function __construct(
-		string $htmlContent
-	) {
-		$this->loadHtml( $htmlContent );
+	/**
+	 * Constructor.
+	 *
+	 * @param string $html_content The HTML content to load.
+	 */
+	public function __construct( string $html_content ) {
+		$this->load_html( $html_content );
 	}
 
-	private function loadHtml( string $htmlContent ): void {
+	/**
+	 * Loads the given HTML content into the DOMDocument.
+	 *
+	 * @param string $html_content The HTML content to load.
+	 */
+	private function load_html( string $html_content ): void {
 		libxml_use_internal_errors( true );
 		$this->dom = new \DOMDocument();
-		if ( ! empty( $htmlContent ) ) {
-			// prefixing the content with the XML declaration to force the input encoding to UTF-8
-			$this->dom->loadHTML( '<?xml encoding="UTF-8">' . $htmlContent, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD );
+		if ( ! empty( $html_content ) ) {
+			// prefixing the content with the XML declaration to force the input encoding to UTF-8.
+			$this->dom->loadHTML( '<?xml encoding="UTF-8">' . $html_content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD );
 		}
 		libxml_clear_errors();
 	}
 
-	public function findElement( string $tagName ): ?\DOMElement {
-		$elements = $this->dom->getElementsByTagName( $tagName );
-		return $elements->item( 0 ) ?: null;
+	/**
+	 * Searches for the first appearance of the given tag name.
+	 *
+	 * @param string $tag_name The tag name to search for.
+	 */
+	public function find_element( string $tag_name ): ?\DOMElement {
+		$elements = $this->dom->getElementsByTagName( $tag_name );
+		return $elements->item( 0 ) ? $elements->item( 0 ) : null;
 	}
 
-	public function getAttributeValue( \DOMElement $element, string $attribute ): string {
+	/**
+	 * Returns the value of the given attribute from the given element.
+	 *
+	 * @param \DOMElement $element The element to get the attribute value from.
+	 * @param string      $attribute The attribute to get the value from.
+	 */
+	public function get_attribute_value( \DOMElement $element, string $attribute ): string {
 		return $element->hasAttribute( $attribute ) ? $element->getAttribute( $attribute ) : '';
 	}
 
 	/**
 	 * Searches for the first appearance of the given tag name and returns the value of specified attribute.
+	 *
+	 * @param string $tag_name The tag name to search for.
+	 * @param string $attribute The attribute to get the value from.
 	 */
-	public function getAttributeValueByTagName( string $tagName, string $attribute ): ?string {
-		$element = $this->findElement( $tagName );
+	public function get_attribute_value_by_tag_name( string $tag_name, string $attribute ): ?string {
+		$element = $this->find_element( $tag_name );
 		if ( ! $element ) {
 			return null;
 		}
-		return $this->getAttributeValue( $element, $attribute );
+		return $this->get_attribute_value( $element, $attribute );
 	}
 
-	public function getOuterHtml( \DOMElement $element ): string {
+	/**
+	 * Returns the outer HTML of the given element.
+	 *
+	 * @param \DOMElement $element The element to get the outer HTML from.
+	 */
+	public function get_outer_html( \DOMElement $element ): string {
 		return (string) $this->dom->saveHTML( $element );
 	}
 
-	public function getElementInnerHTML( \DOMElement $element ): string {
-		$innerHTML = '';
-		$children  = $element->childNodes;
+	/**
+	 * Returns the inner HTML of the given element.
+	 *
+	 * @param \DOMElement $element The element to get the inner HTML from.
+	 */
+	public function get_element_inner_html( \DOMElement $element ): string {
+		$inner_html = '';
+		$children   = $element->childNodes; // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
 		foreach ( $children as $child ) {
 			if ( ! $child instanceof \DOMNode ) {
 				continue;
 			}
-			$innerHTML .= $this->dom->saveHTML( $child );
+			$inner_html .= $this->dom->saveHTML( $child );
 		}
-		return $innerHTML;
+		return $inner_html;
 	}
 }
diff --git a/packages/php/email-editor/tests/unit/Integrations/Utils/Dom_Document_Helper_Test.php b/packages/php/email-editor/tests/unit/Integrations/Utils/Dom_Document_Helper_Test.php
index a4b875b27e..498cbb8d16 100644
--- a/packages/php/email-editor/tests/unit/Integrations/Utils/Dom_Document_Helper_Test.php
+++ b/packages/php/email-editor/tests/unit/Integrations/Utils/Dom_Document_Helper_Test.php
@@ -6,8 +6,8 @@ class Dom_Document_Helper_Test extends \MailPoetUnitTest {
   public function testItFindsElement(): void {
     $html = '<div><p>Some text</p></div>';
     $domDocumentHelper = new Dom_Document_Helper($html);
-    $element = $domDocumentHelper->findElement('p');
-    $empty = $domDocumentHelper->findElement('span');
+    $element = $domDocumentHelper->find_element('p');
+    $empty = $domDocumentHelper->find_element('span');
     $this->assertInstanceOf(\DOMElement::class, $element);
     $this->assertEquals('p', $element->tagName);
     $this->assertNull($empty);
@@ -16,30 +16,30 @@ class Dom_Document_Helper_Test extends \MailPoetUnitTest {
   public function testItGetsAttributeValue(): void {
     $html = '<div><p class="some-class">Some text</p></div>';
     $domDocumentHelper = new Dom_Document_Helper($html);
-    $element = $domDocumentHelper->findElement('p');
+    $element = $domDocumentHelper->find_element('p');
     $this->assertInstanceOf(\DOMElement::class, $element);
-    $this->assertEquals('some-class', $domDocumentHelper->getAttributeValue($element, 'class'));
+    $this->assertEquals('some-class', $domDocumentHelper->get_attribute_value($element, 'class'));
   }
 
   public function testItGetsOuterHtml(): void {
     $html = '<div><span>Some <strong>text</strong></span></div>';
     $domDocumentHelper = new Dom_Document_Helper($html);
-    $element = $domDocumentHelper->findElement('span');
+    $element = $domDocumentHelper->find_element('span');
     $this->assertInstanceOf(\DOMElement::class, $element);
-    $this->assertEquals('<span>Some <strong>text</strong></span>', $domDocumentHelper->getOuterHtml($element));
+    $this->assertEquals('<span>Some <strong>text</strong></span>', $domDocumentHelper->get_outer_html($element));
 
     // testings encoding of special characters
     $html = '<div><img src="https://test.com/DALL·E-A®∑oecasƒ-803x1024.jpg"></div>';
     $domDocumentHelper = new Dom_Document_Helper($html);
-    $element = $domDocumentHelper->findElement('img');
+    $element = $domDocumentHelper->find_element('img');
     $this->assertInstanceOf(\DOMElement::class, $element);
-    $this->assertEquals('<img src="https://test.com/DALL%C2%B7E-A%C2%AE%E2%88%91oecas%C6%92-803x1024.jpg">', $domDocumentHelper->getOuterHtml($element));
+    $this->assertEquals('<img src="https://test.com/DALL%C2%B7E-A%C2%AE%E2%88%91oecas%C6%92-803x1024.jpg">', $domDocumentHelper->get_outer_html($element));
   }
 
   public function testItGetsAttributeValueByTagName(): void {
     $html = '<div><p class="some-class">Some text</p><p class="second-paragraph"></p></div>';
     $domDocumentHelper = new Dom_Document_Helper($html);
-    $this->assertEquals('some-class', $domDocumentHelper->getAttributeValueByTagName('p', 'class'));
-    $this->assertNull($domDocumentHelper->getAttributeValueByTagName('span', 'class'));
+    $this->assertEquals('some-class', $domDocumentHelper->get_attribute_value_by_tag_name('p', 'class'));
+    $this->assertNull($domDocumentHelper->get_attribute_value_by_tag_name('span', 'class'));
   }
 }