windows php 错误： openssl_pkey_export(): cannot get key from parameter 1

I found the solution on stackoverflow and wanted to add it to the browser favorites. I found that there were too many things in the favorites and could not be searched or sorted, making it very inconvenient to find.

Thank you to the foreign programmers, they really answered the questions with high quality.

http://stackoverflow.com/questions/17272809/openssl-pkey-export-generating-error

The above introduces the windows php error: openssl_pkey_export(): cannot get key from parameter 1, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.