Regarding errors similar to 

> [11-May-2017 19:19:13 America/Chicago] PHP Warning: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed

Have you checked the permissions of the cert and directories referenced by openssl?

You can do this

<!-- language lang-php -->

 var_dump(openssl_get_cert_locations());

To get something similar to this

<!-- language lang-php -->

 array(8) {
 ["default_cert_file"]=>
 string(21) "/usr/lib/ssl/cert.pem"
 ["default_cert_file_env"]=>
 string(13) "SSL_CERT_FILE"
 ["default_cert_dir"]=>
 string(18) "/usr/lib/ssl/certs"
 ["default_cert_dir_env"]=>
 string(12) "SSL_CERT_DIR"
 ["default_private_dir"]=>
 string(20) "/usr/lib/ssl/private"
 ["default_default_cert_area"]=>
 string(12) "/usr/lib/ssl"
 ["ini_cafile"]=>
 string(0) ""
 ["ini_capath"]=>
 string(0) ""
 }

This issue frustrated me for a while, until I realized that my "certs" folder had 700 permissions, when it should have had 755 permissions. Remember, this is not the folder for keys but certificates. I recommend reading this [this link on ssl permissions.][1]

Once I did 

<!-- language lang-bash -->

 chmod 755 certs

The problem was fixed, at least for me anyway.


 [1]: https://serverfault.com/questions/259302/best-location-for-ssl-certificate-and-private-keys-on-ubuntu