The behaviour of these functions is affected by
settings in php.ini.
|openssl.cafile||“”||PHP_INI_PERDIR||Available as of PHP 5.6.0.|
|openssl.capath||“”||PHP_INI_PERDIR||Available as of PHP 5.6.0.|
For further details and definitions of the PHP_INI_* modes, see the
configuration setting may be set.
Here’s a short explanation of the configuration
Location of Certificate Authority file on local
filesystem which should be used with the verify_peer context option
to authenticate the identity of the remote peer.
If cafile is not specified or if the certificate is
not found there, the directory pointed to by capath is searched for
a suitable certificate. capath must be a correctly hashed
See also the SSL stream context options.