What are the implications of files being parsed on the original server before being included in PHP?

When files are parsed on the original server before being included in PHP, it can lead to security vulnerabilities such as code injection or execution of malicious code. To prevent this, it is important to disable the execution of PHP code within the included files by setting the `auto_prepend_file` and `auto_append_file` directives in the php.ini file.

// Disable execution of PHP code in included files
ini_set('auto_prepend_file', '');
ini_set('auto_append_file', '');