How to pass Age Verification with DOM - php

Question

I'm attempting to pull some image URLs from Steam store pages, such as:
http://store.steampowered.com/app/35700/
http://store.steampowered.com/app/252490/
Here's the code I'm using:
$url = 'http://store.steampowered.com/app/35700/';
$html = file_get_contents($url);
$dom = new domDocument;
$dom->loadHTML($html);
$dom->preserveWhiteSpace = false;
$images = $dom->getElementsByTagName('img');
foreach ($images as $image) {
echo $image->getAttribute('src');
}
It works fine with the first store page, but the second one redirects to an age verification page, and the script returns the images from there. I need a way for the script to get past the age verification and access the actual store page.
Any help would be appreciated.
Edit:
This is what's passed to the server when the age form is submitted:
snr=1_agecheck_agecheck__age-gate&ageDay=1&ageMonth=January&ageYear=1979
and the cookies that it sets:
lastagecheckage=1-January-1979; expires=Tue, 03 Mar 2015 19:53:42 GMT; path=/; domain=store.steampowered.com
birthtime=662716801; path=/; domain=store.steampowered.com
Edit2:
I can set the cookies using cURL but they aren't used by DOM loadHTML, so I get the same result as before. I need either a way for loadHTML to use specific cookies that I set, or another method of grabbing the image URLs that will use cookies set by cURL.

Answer 1

Solved! Here's the working code:
$url = 'http://store.steampowered.com/app/35700/';
$ch = curl_init();
curl_setopt($ch, CURLOPT_COOKIE, "birthtime=28801; path=/; domain=store.steampowered.com");
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
$dom = new domDocument;
libxml_use_internal_errors(true);
$dom->loadHTML($result);
$dom->preserveWhiteSpace = false;
$images = $dom->getElementsByTagName('img');
foreach ($images as $image) {
$src = $image->getAttribute('src');
echo $src.PHP_EOL;
}
curl_close($ch);

Answer 2

You were looking for php answers, but I was trying to do the same thing in python and this was the most relevant question. Your php answer helped me out so maybe a python solution will help someone. My solution using python-requests in Python 2.7:
import requests
url = 'http://store.steampowered.com/app/252490/'
cookie = {
'birthtime' : '28801',
'path' : '/',
'domain' : 'store.steampowered.com'
}
r = requests.get(url, cookies=cookie)
assert (r.status_code == 200 and r.text.find('Please enter your birth date to continue') < 0), ("Failed to retrieve page for {url}. Error={code}.".format(url=url, code=r.status_code))
print r.text.encode('utf-8')