<script src="../third-party/jquery.min.js"></script>
<script src="../third-party/mathquill/mathquill.min.js"></script>
<link rel="stylesheet" href="../third-party/mathquill/mathquill.css"/>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<?php

    //获取数据
    error_reporting(E_ERROR|E_WARNING);
    $content =  htmlspecialchars($_POST['myEditor']);

    //存入数据库或者其他操作

    //显示
    echo  "<div class='content'>".htmlspecialchars_decode($content)."</div>";