Recursively scans folder for CSS files. Compresses the CSS code in place using Toptal CSS compressor webservice

compress-css.php

<?php

$dir = '{absolute path to css folder}';
$files_and_dirs = ListAllFiles($dir);

$files = GetFiles($files_and_dirs);

CompressFiles($files);

function CompressFiles($files) {

    for ($count = 0; $count < count($files); $count++) {
        
        $contents = file_get_contents($files[$count]);

        $url = 'https://www.toptal.com/developers/cssminifier/api/raw';

        // init the request, set various options, and send it
        $ch = curl_init();

        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POST => true,
            CURLOPT_HTTPHEADER => ["Content-Type: application/x-www-form-urlencoded"],
            CURLOPT_POSTFIELDS => http_build_query([ "input" => $contents ])
        ]);

        $minified = curl_exec($ch);

        // finally, close the request
        curl_close($ch);

        $fh = fopen($files[$count], "w");
        fwrite($fh, $minified);
        fclose($fh);
        echo "Updated file: " . $files[$count] . "\r\n";
        sleep(2);
    }    
}

function GetFiles($items) {
    $data = array();
    for ($count = 0; $count < count($items); $count++) {
        $item = $items[$count];
        if(strpos($item, "top.css") !== false || strpos($item, "middle.css") !== false) {
            $data[] = str_replace(DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR, $item);
        }
    }
    return $data;
}

function ListAllFiles($dir) {
    $array = array_diff(scandir($dir), array('.', '..'));
    
    foreach ($array as &$item) {
      $item = $dir . DIRECTORY_SEPARATOR . $item;
    }
    unset($item);
    foreach ($array as $item) {
      if (is_dir($item)) {
       $array = array_merge($array, ListAllFiles($item . DIRECTORY_SEPARATOR));
      }
    }
    return $array;
  }
?>