How can PHP developers ensure that HTML source code is not rendered by the browser when displayed on a webpage?

To prevent HTML source code from being rendered by the browser when displayed on a webpage, PHP developers can use the htmlspecialchars function to encode special characters in the HTML source code. This function will convert characters like <, >, ", ', and & into their respective HTML entities, preventing the browser from interpreting them as HTML tags. 

&lt;?php
$html_source_code = &quot;&lt;p&gt;This is some &lt;b&gt;bold&lt;/b&gt; text.&lt;/p&gt;&quot;;
echo htmlspecialchars($html_source_code);
?&gt;

Keywords

XSS htmlspecialchars htmlentities escaping security

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