直接上代码
function duxx_check_gravatar($email) { $email_hash = md5(strtolower(trim($email))); $check_uri = 'http://www.gravatar.com/avatar/'.$email_hash.'?d=404'; $headers = @get_headers($check_uri); if (!preg_match("|200|", $headers[0])) { return 0; } else { return 1; } }