How can PHP and HTML interact to cause unexpected behavior in scripts?

When PHP and HTML interact, unexpected behavior can occur if PHP code is not properly enclosed within PHP tags <?php ?> or <?= ?>. This can lead to PHP code being treated as plain text by the browser, causing errors or rendering issues. To solve this, ensure that all PHP code is enclosed within PHP tags to properly execute the code on the server before sending it to the browser. 

&lt;?php
// Correct way to interact between PHP and HTML
echo &quot;&lt;html&gt;&quot;;
echo &quot;&lt;body&gt;&quot;;
echo &quot;&lt;h1&gt;Hello, World!&lt;/h1&gt;&quot;;
echo &quot;&lt;/body&gt;&quot;;
echo &quot;&lt;/html&gt;&quot;;
?&gt;

Keywords

PHP HTML interaction unexpected behavior scripts

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