How can PHPBB forum administrators ensure that user-generated PHP code in posts does not compromise the forum's security?

To ensure that user-generated PHP code in posts does not compromise the forum's security, PHPBB forum administrators can disable the ability for users to execute PHP code within their posts. This can be achieved by filtering out any PHP code from user posts before they are displayed on the forum. 

// Disable execution of PHP code in user posts
$filtered_content = preg_replace('/<\?php(.*?)\?>/is', '', $user_post_content);
echo $filtered_content;

Keywords

PHPBB forum administrators user-generated PHP code security validation

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