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<title>Predefined Constants</title>
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<h1>Predefined Constants</h1>
<p class="simpara">
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
</p>
<p class="para">
The following constants are meant to be used with
<span class="function"><a href="function.parse-url.html" class="function">parse_url()</a></span> and are available since PHP 5.1.2.
</p>
<dl>
<dt id="constant.php-url-scheme">
<strong><code>PHP_URL_SCHEME</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.php-url-host">
<strong><code>PHP_URL_HOST</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the hostname of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-port">
<strong><code>PHP_URL_PORT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the port of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-user">
<strong><code>PHP_URL_USER</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the user of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-pass">
<strong><code>PHP_URL_PASS</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the password of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-path">
<strong><code>PHP_URL_PATH</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the path of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-query">
<strong><code>PHP_URL_QUERY</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the query string of the URL parsed.
</span>
</dd>
<dt id="constant.php-url-fragment">
<strong><code>PHP_URL_FRAGMENT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Outputs the fragment (string after the hashmark #) of the URL parsed.
</span>
</dd>
</dl>
<p class="para">
The following constants are meant to be used with
<span class="function"><a href="function.http-build-query.html" class="function">http_build_query()</a></span>.
</p>
<dl>
<dt id="constant.php-query-rfc1738">
<strong><code>PHP_QUERY_RFC1738</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Encoding is performed per
<a href="http://www.faqs.org/rfcs/rfc1738" class="link external">» RFC 1738</a> and the
<em>application/x-www-form-urlencoded</em> media type, which
implies that spaces are encoded as plus (<em>+</em>) signs.
</span>
</dd>
<dt id="constant.php-query-rfc3986">
<strong><code>PHP_QUERY_RFC3986</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Encoding is performed according to <a href="http://www.faqs.org/rfcs/rfc3986" class="link external">» RFC 3986</a>,
and spaces will be percent encoded (<em>%20</em>).
</span>
</dd>
</dl>
</div>
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