Does the hexdec Function in PHP Distinguish Between Uppercase and Lowercase Hexadecimal Letters? Do They Affect Conversion Results?

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// Example of unrelated preliminary content</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"This is a sample of unrelated PHP code.\n"</span></span><span>;
</span><span><span class="hljs-variable">$time</span></span><span> = </span><span><span class="hljs-title function_ invoke__">date</span></span><span>(</span><span><span class="hljs-string">"Y-m-d H:i:s"</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Current time: <span class="hljs-subst">$time</span>\n"</span></span><span>;
</span><span><span class="hljs-meta">?></span></span><span>
<p><hr></p>
<p></span><?php<br>
// Main content begins<br>
echo "<h1>Does the hexdec Function in PHP Distinguish Between Uppercase and Lowercase Hexadecimal Letters? Do They Affect Conversion Results?</h1>";</p>
<p data-is-last-node="" data-is-only-node="">echo <span><span class="hljs-string">"<p>In PHP, <code>hexdec()