What are the potential issues with including PHP code in the HTML <head> section?

Including PHP code in the HTML <head> section can lead to potential issues such as messy and difficult-to-maintain code, as well as security vulnerabilities if not properly sanitized. To solve this issue, it is recommended to separate PHP logic from the presentation layer by using PHP to generate dynamic content and variables, then outputting them in the appropriate locations within the HTML structure. 

&lt;?php
$title = &quot;Page Title&quot;;
?&gt;

&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;&lt;?php echo $title; ?&gt;&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;!-- HTML content here --&gt;
&lt;/body&gt;
&lt;/html&gt;

Keywords

PHP code HTML head security vulnerability cross-site scripting code injection

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