how to use crawlera

<?php

//always use
//curl_setopt($ch, CURLOPT_PROXY, "proxy.crawlera.com:8010");
//curl_setopt($ch, CURLOPT_PROXYUSERPWD, "5ce4d6207d9143799c0182d8ce326436:");
//before CURLOPT_URL
/**
 * example:
 * curl_setopt($ch, CURLOPT_URL, "https://google.com");
 * curl_setopt($ch, CURLOPT_PROXY, "proxy.crawlera.com:8010");
 * curl_setopt($ch, CURLOPT_PROXYUSERPWD, "5ce4d6207d9143799c0182d8ce326436:");
 *
 *  CURLOPT_PROXY => server proxy [proxy.crawlera.com:8010]
 *
 *  CURLOPT_PROXYUSERPWD => your user credentials [5ce4d6207d9143799c0182d8ce326436:]
 *
 *  thats all.
 *
 *
 */




$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://google.com");
curl_setopt($ch, CURLOPT_PROXY, "proxy.crawlera.com:8010");
curl_setopt($ch, CURLOPT_PROXYUSERPWD, "5ce4d6207d9143799c0182d8ce326436:");
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
 //required for HTTPS
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 //required for HTTPS
$scraped_page = curl_exec($ch);
if($scraped_page === false){
    echo 'cURL error: ' . curl_error($ch);
}else{
    echo $scraped_page;
}
curl_close($ch);