What are potential issues when trying to extract variables from HTML code on a different server using PHP?

When trying to extract variables from HTML code on a different server using PHP, potential issues may arise due to cross-origin resource sharing (CORS) restrictions. To solve this problem, you can use PHP to make a request to the remote server, retrieve the HTML content, and then extract the desired variables from the response. 

<?php
// Specify the URL of the remote server
$url = 'https://example.com/page';

// Make a request to the remote server and retrieve the HTML content
$html = file_get_contents($url);

// Extract variables from the HTML code using regular expressions or a HTML parser
// For example, to extract the title of the page
if (preg_match('/<title>(.*?)<\/title>/', $html, $matches)) {
    $title = $matches[1];
    echo $title;
}
?>

Keywords

Cross-origin CORS file_get_contents cURL parsing

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