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WordPress 5 Plugin: WH_Hello_World
<?php
/**
* @package WH_Hello_World
* @version 1.0.0
*/
/*
Plugin Name: WH Hello World
Plugin URI: https://wordpress-handbuch.com
Description: Testausgabe in Front- und Backend
Author: Richard Eisenmenger
Version: 1.0.0
Author URI: https://richard-eisenmenger.com
*/
function hello_world() {
echo "<script>alert('Hallo Welt!');</script>\n";
}
add_action( 'admin_head', 'hello_world' );
add_action( 'wp_head', 'hello_world' );
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