Medium PHP#1

fetch.php

// Define regexes for css include types
$styleTagRegex = '/<style[type="text\/css"]?.*?>(.*?)<\/style>/is';
$linkStyleRegex = '/<link(?=[^<>]*?)(?=[^<>]*?(?:href=["\'](.*?)["\']|>))(?=[^<>]*rel=["\']stylesheet["\'])(?:.*?<\/\1>|[^<>]*>)/i';

// Initialize array of css contents
 $cssSource = array('internal' => '');
  
// Get page content
function requestPage($url) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
  curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');
  $result = curl_exec($ch);
  curl_close ($ch);
  return $result;
}

// Fetch html
$htmlSource = requestPage($url);
  
// Match link and style tags
preg_match_all($linkStyleRegex, $htmlSource, $styleLinks);
preg_match_all($styleTagRegex, $htmlSource, $styleTags);
  
// Fetch source of styleLinks and append to the list
foreach($styleLinks[1] as $styleLink) {
    // Get content of css link
    $linkSource = requestPage($styleLink);
  
    preg_match_all($cssImportRegex, $linkSource, $)
  
    $cssSource[$styleLink] = $linkSource;
}
  
// Merge internal css
foreach($styleTags[1] as $styleTag) {
  // Get content of css link
  $cssSource['internal'] .= $linkSource;
}

$completeContent = implode('\n', $cssSource);