php curl to website without captcha - php

Question

Please bear with me as I am completely new to php curl and its intricacies. I've picked up some tips here but am still stuck (for days) so hope someone can really help!
When I curl to this url http://agentnet.propertyguru.com.sg/ex_login?w=1&redirect=/ex_home, there is a key difference between viewing it using my web browser vs curl. i.e. a captcha field (together with an error message) will appear when viewed via curl. There is no captcha or error message when viewed via browser. How do I do it such that curl produces the same result as a browser?
Here's my simple code snippet.
$loginUrl = 'http://agentnet.propertyguru.com.sg/ex_login?w=1&redirect=/ex_home';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $loginUrl);
$cookie = realpath('cookie.txt'); // 'FSPrompt-6496=completed;' is stored in this file
curl_setopt($ch, CURLOPT_COOKIESESSION, TRUE);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.0; rv:30.0) Gecko/20100101 Firefox/30.0');
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, TRUE);
$request_headers = array();
$request_headers[] = 'Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8';
$request_headers[] = 'Accept-Language:en-US,en;q=0.5';
$request_headers[] = 'Connection: Keep-Alive';
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
$msg = curl_exec($ch);

Answer 1

This site require cookie to let you login.
When you access /ex_login (without cookie), it redirect you to /distil_identify_cookie.html?uid=
At /distil_identify_cookie.html?uid=…, the browser have to save cookie value, it redirect you back to the first login page.
On the first login page, you have valid cookie, no more cookie init needed.
So you have to update your script to save the cookie correctly. Guzzle is great library to build http client.