Skeaper

<?php
  $insta_source = file_get_contents('https://www.instagram.com/gopro');
  $shards = explode('window._sharedData = ', $insta_source);
  $insta_json = explode(';</script>', $shards[1]);
  $insta_array = json_decode($insta_json[0], TRUE);
  echo '<pre>'; print_r($insta_array); echo '</pre>';

$profile_pic_url = $insta_array['entry_data']['ProfilePage'][0]['graphql']['user']['profile_pic_url'];