<h1 id="h1-u6211u7684u7B2Cu4E00u4E2Au4F5Cu4E1A"><a name="我的第一个作业" class="reference-link"></a><span class="header-link octicon octicon-link"></span>我的第一个作业</h1><h2 id="h2-mysql"><a name="mysql" class="reference-link"></a><span class="header-link octicon octicon-link"></span>mysql</h2><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code><span class="pln">js</span></code></li><li class="L1"><code><span class="kwd">const</span><span class="pln"> APP </span><span class="pun">=“商城”</span></code></li></ol></pre><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code><span class="pln">html</span></code></li><li class="L1"><code><span class="str"><h2></span></code></li><li class="L2"><code><span class="pln">hello world</span></code></li><li class="L3"><code><span class="pun"></</span><span class="pln">h2</span><span class="pun">></span></code></li></ol></pre><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code class="lang-php"><span class="pln">$db</span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> PDO</span><span class="pun">();</span></code></li></ol></pre>