通过PHP脚本输入网站凭据

Question

I am attempting to write a scraper for a site that I need to log into my account to get the data I'm wanting to scrape. I believe the issue is in the way the site is expecting the login data and I don't understand the correct way to format that info. Below is my code and the var_dump return bool(false). How should this be formatted so the login is successful?

    include "simple_html_dom.php";

$postFields = array(
    "username" => "[e-mail]", //This would be a valid username for the site.
    "password" => "bbpassword1", //This would be a valid password for the site.
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://www.bodybuilding.com/profile/login");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($postFields));
curl_setopt($ch, CURLOPT_COOKIEJAR, "cookie.txt");
curl_setopt($ch, CURLOPT_CAINFO, "/CAcert.pem");
$response = curl_exec($ch);

var_dump($response);