if ( $_SERVER['REQUEST_METHOD'] === 'POST' ) {
    $image_url = isset( $_POST['image_url'] ) ? sanitize_text_field( $_POST['image_url'] ) : '';
    // For simplicity, we're not handling file uploads in this example, just URLs
    $prompt = isset( $_POST['prompt'] ) ? sanitize_textarea_field( $_POST['prompt'] ) : '';

    if ( ! empty( $image_url ) ) {
        // Removed $style and $filters
        $result = ai_avatar_generate_avatar( get_current_user_id(), $image_url, $prompt );
    } else {
        $result = [
            'status' => 'error',
            'message' => 'Please enter an image URL.',
        ];
    }
} else {
    $image_url = '';
    $prompt = '';
    $result = [];
}

<form method="post">
    <p>
        <label for="image_url">Image URL:</label><br>
        <input type="text" name="image_url" id="image_url" value="<br />
<b>Warning</b>:  Undefined variable $image_url in <b>/dom91102/wp-content/plugins/ai-avatar-generator/templates/test-page.php</b> on line <b>24</b><br />
" size="50">
    </p>

    <p>
        <label for="prompt">Prompt:</label><br>
        <textarea name="prompt" id="prompt" rows="4" cols="50"><br />
<b>Warning</b>:  Undefined variable $prompt in <b>/dom91102/wp-content/plugins/ai-avatar-generator/templates/test-page.php</b> on line <b>29</b><br />
</textarea>
    </p>

    <button type="submit">Generate Avatar</button>
</form>