<?php

$your_google_calendar="https://www.google.com/calendar/embed?src=usa__en@holiday.calendar.google.com&gsessionid=OK";

$url= parse_url($your_google_calendar);

$google_domain = $url['scheme'].'://'.$url['host'].dirname($url['path']).'/';

// Load and parse Google's raw calendar

$dom = new DOMDocument;

$dom->loadHTMLfile($your_google_calendar);

// Change Google's CSS file to use absolute URLs (assumes there's only one element)

$css = $dom->getElementByTagName('link')->item(0);

$css_href = $css->getAttributes('href');

$css->setAttributes('href', $google_domain . $css_href);

// Change Google's JS file to use absolute URLs

$scripts = $dom->getElementByTagName('script')->item(0);

foreach ($scripts as $script) {

$js_src = $script->getAttributes('src');

if ($js_src) $script->setAttributes('src', $google_domain . $js_src);

}

// Create a link to a new CSS file called custom_calendar.css

$element = $dom->createElement('link');

$element->setAttribute('type', 'text/css');

$element->setAttribute('rel', 'stylesheet');

$element->setAttribute('href', 'custom_calendar.css');

// Append this link at the end of the element

$head = $dom->getElementByTagName('head')->item(0);

$head->appendChild($element);

// Export the HTML

echo $dom->saveHTML();

?>