What are the security implications of using allow_url_include in PHP?

Using allow_url_include in PHP can pose a significant security risk as it allows remote files to be included and executed on the server. This can lead to remote code execution, allowing attackers to run malicious code on the server. To mitigate this risk, it is recommended to disable allow_url_include in the PHP configuration.

// Disable allow_url_include in PHP configuration
ini_set('allow_url_include', 0);