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<title>Changed Functions</title>
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<h2 class="title">Changed Functions</h2>
<p class="simpara">
Several functions were given new, optional parameters in PHP 5.4:
</p>
<p class="simpara">PHP Core:</p>
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
Added the optional <em><code class="parameter">limit</code></em> parameter to <span class="function"><a href="function.debug-backtrace.html" class="function">debug_backtrace()</a></span>
and <span class="function"><a href="function.debug-print-backtrace.html" class="function">debug_print_backtrace()</a></span>, to limit the amount of stack frames returned.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.is-link.html" class="function">is_link()</a></span> now works properly for symbolic links on Windows Vista
or later. Earlier systems do not support symbolic links.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.parse-url.html" class="function">parse_url()</a></span> now recognizes the host when a scheme is omitted,
and a leading component separator is present. As of PHP 5.4.7.
</span>
</li>
</ul>
<p class="simpara">OpenSSL:</p>
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<li class="listitem">
<span class="simpara">
Added a no padding option to the <span class="function"><a href="function.openssl-encrypt.html" class="function">openssl_encrypt()</a></span> and <span class="function"><a href="function.openssl-decrypt.html" class="function">openssl_decrypt()</a></span>
functions.
</span>
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<p class="simpara">Intl:</p>
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<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.idn-to-ascii.html" class="function">idn_to_ascii()</a></span> and <span class="function"><a href="function.idn-to-utf8.html" class="function">idn_to_utf8()</a></span> now take two extra
parameters, one indicating the variant (IDNA 2003 or UTS #46) and another, passed by reference,
to return details about the operation in case UTS #46 is chosen.
</span>
</li>
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