i have been facing issue paypal ipn since last couple of days had similar problem before got resolved of post paypal ipn: certificate verify failed
curl error: [60] ssl certificate problem, verify ca cert ok. details:error:14090086:ssl routines:ssl3_get_server_certificate:certificate verify failed
it worked fine till couple of days , started breaking flow
i tried setting curl_setopt($ch, curlopt_sslversion, 1); didnt helped
any ideas possible cause ?