Description:
------------
I went to 
http://us.php.net/manual/en/function.curl-setopt.php
and did a search for CURLOPT_CERTINFO
and did not find anything.

Yet I went to
http://php.net/ChangeLog-5.php
and did a search for CURLOPT_CERTINFO
and found the option had been available since 5.3.2.






Test script:
---------------
<?php
if($fp = tmpfile())
{
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL,"https://www.digicert.com/");
	curl_setopt($ch, CURLOPT_STDERR, $fp);
	curl_setopt($ch, CURLOPT_CERTINFO, 1);
	curl_setopt($ch, CURLOPT_VERBOSE, 1);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,  2);
	curl_setopt($ch, CURLOPT_SSLVERSION,3);
	$result = curl_exec($ch);
	curl_errno($ch)==0 or die("Error:" . curl_errno($ch) . " Message:" . curl_error($ch));
	fseek($fp, 0);//rewind
	$str='';
	while(strlen($str.=fread($fp,8192))==8192);
	echo $str;
	fclose($fp);
}
?>


Expected result:
----------------
echo $str; 
produce the debug output of the certificate, similar to linux command line:
openssl x509 -in my_website_com.crt -noout -text

I played with it and built some sample code that works.  Also, CURLOPT_CERTINFO outputs data to CURLOPT_STDERR.  CURLOPT_CERTINFO seems to only work when CURLOPT_VERBOSE is 1.