How can the use of regex in .htaccess impact the functionality of PHP scripts?

Using regex in .htaccess can impact the functionality of PHP scripts if it interferes with the URL rewriting rules. This can cause unexpected behavior or errors in the PHP scripts. To solve this issue, it is important to carefully review and test the regex rules in the .htaccess file to ensure they do not conflict with the PHP scripts. 

// PHP code snippet to check if the current request is not a file or directory
if (!file_exists($_SERVER['SCRIPT_FILENAME'])) {
    // Handle the request or redirect as needed
    header("HTTP/1.0 404 Not Found");
    exit();
}

Keywords

regex .htaccess PHP scripts functionality impact

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