How to Resolve a 403 Forbidden Error When Scraping a Website Using PHP Simple HTML DOM Parser?

I am trying to scrape data from a website using the PHP Simple HTML DOM Parser. However, every time I attempt to fetch the HTML content of the page, I encounter a 403 Forbidden error.

To troubleshoot, I tried setting custom headers, including a User-Agent, using Guzzle PHP to mimic a browser request. Despite this, the issue persists, and I am unable to retrieve the webpage content.

// using simple dom parser
require '../simple_html_dom.php';

$html = file_get_html('https://www.mywebsite.com');
$title = $html->find('title', 0);
$image = $html->find('img', 0);

echo $title->plaintext."<br>n";
echo $image->src;

// using guzzle
require '../../vendor/autoload.php';

use GuzzleHttpClient;

$url = "https://www.mywebsite.com";
$client = new Client();

try {
    $response = $client->request('GET', $url, [
        'headers' => [
            'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
            'Accept-Language' => 'en-US,en;q=0.9',
            'Accept-Encoding' => 'gzip, deflate, br',
            'accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
            'Referer' => 'https://www.mywebsite.com',
        ]
    ]);

    if ($response->getStatusCode() === 200) {
        $html = $response->getBody()->getContents();
        echo "Fetched HTML (first 500 characters):n" . substr($html, 0, 500) . "nn";

        // Continue with DOM parsing...
    } else {
        echo "Failed to fetch the URL. HTTP Status Code: " . $response->getStatusCode() . "n";
    }
} catch (Exception $e) {
    echo "An error occurred: " . $e->getMessage() . "n";
}

I suspect the server might have additional mechanisms, such as IP blocking, anti-bot protection, or cookies, that are causing the 403 error.

• Are there other headers or configurations I should include to bypass
  the 403 Forbidden error?
• Is there an alternative approach or library that might work better
  for scraping websites with such restrictions?

Any guidance on resolving this issue would be greatly appreciated!