get_screenshots.php

<?php
static function get_screenshots(
    $sites,
    $endpoint,
    $token,
    $device_width,
    $device_height
  ) {
    //An array that will contain all of the information
    //relating to each request.
    $requests = array();
    $query = "";

    //Initiate a multiple cURL handle
    $mh = curl_multi_init();

    //Loop through each URL.
    foreach ($sites['sites'] as $k => $site) {
      // var_dump($k);
      $url = $site["uri"];
      $query .= "?url=$url&apikey=$token&width=$device_width&height=$device_height";
      $requests[$k] = array();
      $requests[$k]['url'] = $endpoint . $query;
      $requests[$k]['site'] = $url;
      //Create a normal cURL handle for this particular request.
      $requests[$k]['curl_handle'] = curl_init($url);
      //Configure the options for this request.
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_RETURNTRANSFER, true);
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_TIMEOUT, 10);
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_CONNECTTIMEOUT, 10);
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_SSL_VERIFYHOST, false);
      curl_setopt($requests[$k]['curl_handle'], CURLOPT_SSL_VERIFYPEER, false);

      // var_dump($requests[$k]);
      //Add our normal / single cURL handle to the cURL multi handle.
      curl_multi_add_handle($mh, $requests[$k]['curl_handle']);
    }

    //Execute our requests using curl_multi_exec.
    $stillRunning = false;
    do {
      curl_multi_exec($mh, $stillRunning);
    } while ($stillRunning);

    //Loop through the requests that we executed.
    foreach ($requests as $k => $request) {
      print_r($request);
      //Remove the handle from the multi handle.
      curl_multi_remove_handle($mh, $request['curl_handle']);
      //Get the response content and the HTTP status code.
      $requests[$k]['content'] = curl_multi_getcontent($request['curl_handle']);
      $requests[$k]['http_code'] = curl_getinfo($request['curl_handle'], CURLINFO_HTTP_CODE);
      //Close the handle.
      curl_close($requests[$k]['curl_handle']);
    }
    //Close the multi handle.
    curl_multi_close($mh);

    //var_dump the $requests array for example purposes.
    // var_dump($requests);
    foreach ($requests as $j => $response) {
      // pass the site name and screenshot file to save func for processing and saving to the server.
      self::save_screenshot($response[$j]['site'], $response[$j]['content']);
    }
  }
?>