<?php
/**
 * Plugin Name: Mein cooles Plugin
 * Plugin URI: https://example.com/mein-cooles-plugin
 * Description: Mein super cooles Plugin
 * Version: 1.0
 * Author: Sam Doe
 * Author URI: https://example.com
 */

function custom_excerpt_length( $length ) {
    return 100;
}
add_filter( 'excerpt_length', 'custom_excerpt_length' );