php-doc-en/reference/url/constants.xml

<?xml version="1.0" encoding="utf-8"?>
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<appendix xml:id="url.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.constants;
 &extension.constants;
 <para>
  The following constants are meant to be used with
  <function>parse_url</function> and are available since PHP 5.1.2.
 </para>
 <variablelist>
  <varlistentry xml:id="constant.php-url-scheme">
   <term>
    <constant>PHP_URL_SCHEME</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-host">
   <term>
    <constant>PHP_URL_HOST</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
    Outputs the hostname of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-port">
   <term>
    <constant>PHP_URL_PORT</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the port of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-user">
   <term>
    <constant>PHP_URL_USER</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the user of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-pass">
   <term>
    <constant>PHP_URL_PASS</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the password of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-path">
   <term>
    <constant>PHP_URL_PATH</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the path of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-query">
   <term>
    <constant>PHP_URL_QUERY</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the query string of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-url-fragment">
   <term>
    <constant>PHP_URL_FRAGMENT</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Outputs the fragment (string after the hashmark #) of the URL parsed.
    </simpara>
   </listitem>
  </varlistentry>
 </variablelist>
 <para>
   The following constants are meant to be used with
  <function>http_build_query</function>.
 </para>
 <variablelist>
  <varlistentry xml:id="constant.php-query-rfc1738">
   <term>
    <constant>PHP_QUERY_RFC1738</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
     Encoding is performed per
       <link xlink:href="&url.rfc;1738">RFC 1738</link> and the
       <literal>application/x-www-form-urlencoded</literal> media type, which
       implies that spaces are encoded as plus (<literal>+</literal>) signs.
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-query-rfc3986">
   <term>
    <constant>PHP_QUERY_RFC3986</constant>
    (<type>integer</type>)
   </term>
   <listitem>
    <simpara>
      Encoding is performed according to <link xlink:href="&url.rfc;3986">RFC 3986</link>,
      and spaces will be percent encoded (<literal>%20</literal>).
    </simpara>
   </listitem>
  </varlistentry>
 </variablelist>
</appendix>

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