A simple script that uses phpQuery-onefile and custom PHP code to create a json file from scraping coinmarketcap.

fetchcoinmarketcap.php

<?php
  require('phpQuery-onefile.php');
  
  $page = phpQuery::newDocumentFileHTML('http://coinmarketcap.com/');

  $cryptoprices = 'var cryptoprices = {';

  $cryptoprices .= 'markets:[';

  foreach( pq('tbody tr') as $row ) {
    $id = pq($row)->attr('id');
    $img = pq($row)->find('img')->attr('src');
    $name = pq($row)->find('.currency-name a')->text();
    $url = pq($row)->find('.currency-name a')->attr('href');
    $price = pq($row)->find('.price')->attr('data-usd');

    $cryptoprices .= '{name:"' . $name . '",id:"' . $id . '",img:"' . $img . '",url:"' . $url . '",price:"' . $price . '"},';

  };

  $cryptoprices = substr($cryptoprices, 0, -1);
  
  $cryptoprices .= '],';

  $cryptoprices .= 'timestamp:"' . pq('.row > .col-xs-12 > p.small')->text() . '"';

  $cryptoprices .= '};';

  if ($cryptoprices != '' || $cryptoprices != 0) {
    file_put_contents('static/js/cryptoprices.js', $cryptoprices);
    echo 'Everything went well! Updated on ' . date('l jS \of F Y h:i:s A');
  } else {
    echo 'Oops, something went wrong. Here\'s what Cryptoprices looks like: ' . $cryptoprices;
  }
?>