Question

I need to display SSL certificat information about Serial Number.
When I use

$cert = file_get_contents('mycert.crt');
$data=openssl_x509_parse($cert,true);
$data['serialNumber']

I receive like
-5573199485241205751
But when I run command
openssl x509 -in ‘mycert.crt’ -noout -serial
I receive
serial=B2A80498A3CEDC09
is it possible receive in PHP?
Thanks.

Answer 1

Thanks Petey B the idea was interesting so have help me to find direction to search.
The solution is:

$serial_number= strtoupper(dechex($serial_number));