What are common installation issues when trying to set up PHP5 on Apache 2.0.50?

Common installation issues when setting up PHP5 on Apache 2.0.50 include missing or incorrect configuration settings in the Apache configuration file (httpd.conf), incorrect file permissions for PHP files, and conflicts with other modules or extensions. To solve these issues, make sure the PHP module is correctly loaded in the Apache configuration file, set the correct file permissions for PHP files, and check for any conflicting modules or extensions.

LoadModule php5_module /path/to/php5_module.so
AddHandler php5-script .php
DirectoryIndex index.php