Hide / Removing specific elements for users who are not logged in by ID.

gistfile1.txt

Dont forget to change ID #my-hide-1  to your CSS IDs

The custom code is a WordPress PHP script that securely modifies a webpage's HTML by removing specific elements for users who are not
logged in. It initiates an output buffer to capture the page content, then processes and filters it based on element IDs before the
content is rendered in the browser. This ensures that certain parts of the page are hidden from public view, enhancing privacy and
security.







// Start output buffering and register the callback function
function start_output_buffering() {
    ob_start('callback_modify_html_output');
}

// Callback function to modify the HTML output if the user is not logged in
function callback_modify_html_output($buffer) {
    // Check if the user is not logged in
    if (!is_user_logged_in()) {
        // Create a new DOMDocument and load the HTML
        $dom = new DOMDocument();
        libxml_use_internal_errors(true); // Use internal error handling
        $dom->loadHTML(mb_convert_encoding($buffer, 'HTML-ENTITIES', 'UTF-8'), LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
        libxml_clear_errors(); // Clear any errors that were ignored

        // List all IDs you want to remove here
        $elementIds = ['my-hide1', 'my-hide2', 'my-hide3'];

        // Remove elements by IDs
        foreach ($elementIds as $id) {
            $element = $dom->getElementById($id);
            if ($element) {
                $element->parentNode->removeChild($element);
            }
        }

        // Save the modified HTML back to the buffer
        $buffer = $dom->saveHTML();
    }
    // Return the buffer
    return $buffer;
}

// End output buffering and send output to the browser
function end_output_buffering() {
    ob_end_flush();
}

// Hook functions to WordPress
add_action('get_header', 'start_output_buffering');
add_action('wp_footer', 'end_output_buffering');