fatal error: ‘openssl/bio.h’ file not found
I’m on El Capitan 10.11.6 and i had the issue while installing manually the mongodb php extension. I solved it following the indications of @user7059092 about the configure stage : $./configure LDFLAGS=’-L/usr/local/opt/openssl/lib’ CPPFLAGS=’-I/usr/local/opt/openssl/include’