[PHP] Remove Images with DOMDocument

00-replace-image-src.php

<?php

// Instantiate a DOMDocument object and load the incoming $description HTML.
$domDocument = new DOMDocument();
$domContent = $domDocument->loadHTML(mb_convert_encoding($description, 'HTML-ENTITIES'));

// Find all of the images in the HTML.
$images = $domDocument->getElementsByTagName('img');

// If there are images, then iterate through each of them.
if (0 !== \count($images)) {
	$urlPrefix = $this->getUrlPrefix(); // A helper function for getting the URL prefix.
	foreach ($images as $image) {
		$image->setAttribute(
			'src',
			$urlPrefix.$image->getAttribute('src')
		);

		// If the image's source results in a 404 status code, set the `src` to an empty string.
		if (!$this->isValidImage($image->getAttribute('src'))) {
			$image->setAttribute('src', '');
		}
	}
}

// Save the changed document and send it to the front-end.
return $domDocument->saveHTML();