I installed the PHP 5.6.31_7 using the brew install php56, brew reinstall php56 --with-httpd24, and brew reinstall php56 --with-apache; however, still I cannot find the libexec folder to make the necessary configuration in my httpd.conf file. Any solution is appreciated. I assume the config path should be something like LoadModule php5_module /usr/local/Cellar/php56/5.6.31_7/libexec/apache2/libphp5.so.
You should be able to find the file in /usr/local/opt/php56/libexec/apache2/libphp5.so if it installed successfully.