PHP - htmlspecialchars [关闭]

I am attempting to use "htmlspecialchars" function to sanitize URLs. Below is the code:

$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);
echo $new;

The anticipated output should be:

<a href='test'>Test</a>

However what I get is:

<a href='test'>Test</a>

It is not actually stripping the special characters at all. Am I doing something incorrectly? The above example is a copy and paste directly from php.net.

I am using PHP Version 5.4.8.

When I run that, the output I get is:

<a href='test'>Test</a>

Either:

• Your PHP interpretor is broken
• You are looking at the rendered HTML and not the HTML source