What are inline PHP tags utilizing the PHP shortcut operator? <pre><code> &lt;html&gt; &lt;head&gt;&lt;/head&gt; &lt;body&gt; &lt;h1&gt;Welcome to Our Website!&lt;/h1&gt; &lt;hr/&gt; &lt;h2&gt;News&lt;/h2&gt; &lt;h4&gt;&lt;?=$data['title'];?&gt;&lt;/h4&gt; &lt;p&gt;&lt;?=$data['content'];?&gt;&lt;/p&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Can anyone tell me what's the "=" sign before variable names ? I thought of some echo alias but I couldn't find anything, thanks for your help</p>