I am trying to sign PDF using TCPDF, but I have got this error:
Warning: openssl_pkcs7_sign(): error getting private key in C:\wamp\www\tcpdf\tcpdf.php on line 7594.
My PHP version is 5.5.12 and TCPDF 6.2.11. Windows 7.
Other examples run well but this fails. I have tried:
'file://'.( dirname(FILE)).'./path/to/file' and again $certificate = 'file://'.realpath('../tcpdf.crt');
but does not work for me.