In PHP 8.3 & PHP 8.4, the `htmlspecialchars_decode()` function is used to convert special HTML entities back to their corresponding characters. This is the reverse of the `htmlspecialchars()` function, which converts special characters to HTML entities.Syntax:

<?phphtmlspecialchars_decode(string $string, int $flags = ENT_COMPAT | ENT_HTML401): string?>

Example Usage:

<?php// A string with HTML entities$string = "This is a &lt;strong&gt;test&lt;/strong&gt; string with &quot;quotes&quot; and &amp; symbols.";// Decode the HTML entities$decodedString = htmlspecialchars_decode($string);echo $decodedString;?>

Output:

This is a <strong>test</strong> string with "quotes" and & symbols.