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<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/styles/default.min.css"> <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/highlight.min.js"></script> <pre><code class="php"> echo 'hi'; </code></pre>

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