Part 1 – The CURL command-line program
If curl is not setup correctly for SSL (HTTPS) data transfers an error is displayed. The error message starts like this:
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: http://curl.haxx.se/docs/sslcerts.html
There are several options to solve this problem:
- Ignore the problem and add -k to the command line. This is not recommended.
- Download the latest cacert.pem file. Specify this file using the command line option –cacert <path>/cacert.pem.
- Download the latest cacert.pem file. Set the environment variable “set CURL_CA_BUNDLE=<path>/cacert.pem”.
- On Windows put “curl-ca-bundle.crt” in your path. The bundle is part of the Windows download.
I see this problem pop up on StackOverflow often.
Curl documentation on this issue.
Download Curl for Windows and Linux.
Download cacert.pem for all platforms.
Part 2 – PHP Programs
When running a PHP program and you receive an error containing the following text:
cURL error 60: SSL certificate problem: unable to get local issuer certificate
- Download the latest cacert.pem file.
cacert.pemto where you have PHP installed. For example if the base directory for PHP is
- Modify the php.ini file to include the following line. Adjust to specify your PHP directory.
curl.cainfo = "C:\php74\extras\ssl\cacert.pem"
- If you are running under a webserver, restart Apache/Nginx/etc.
I design software for enterprise-class systems and data centers. My background is 30+ years in storage (SCSI, FC, iSCSI, disk arrays, imaging) virtualization. 20+ years in identity, security, and forensics.
For the past 14+ years, I have been working in the cloud (AWS, Azure, Google, Alibaba, IBM, Oracle) designing hybrid and multi-cloud software solutions. I am an MVP/GDE with several.