# This is the list of email addresses
# that we're going to parse. Should be
# one per line.
$handle = fopen("uniques.txt", "r");

# Print a clear line
echo "\n";
$total = 0;
$count = 0;
# Iterate over each line in the file
while (!feof($handle)) {

# Per Gravatar spec, trim the whitespace and
# convert all to lowercase.
$address = strtolower(trim(fgets($handle)));
$total++;
# Take the MD5 hash of the address
$hash = md5($address);

# Perform the web lookup
$web = curl_init("http://en.gravatar.com/${hash}.xml");
curl_setopt($web, CURLOPT_RETURNTRANSFER, TRUE);
$response = curl_exec($web);

# Get the response code from the server.
# For purposes of this process we don't care
# about the contents of the result.
$http_code = curl_getinfo($web, CURLINFO_HTTP_CODE);
switch ($http_code) {
case 200:
# Response was 200, so print out the URL for
# the profile.
echo "\rhttp://en.gravatar.com/${hash}.xml";
$count++;
break;
case 404:
# API response was 404, so no gravatar exists
echo "\rNOT_FOUND";
break;
default:
# Not one of the expected return codes from
# the API server. Print an error.
echo "ERROR($http_code)\n";
}
echo "\n$count/$total";
curl_close($web);
}