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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@156188 c90b9560-bf6c-de11-be94-00142212c4b1
217 lines
7.5 KiB
XML
217 lines
7.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.8 $ -->
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<appendix id="transports">
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<title>List of Supported Socket Transports</title>
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<para>
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The following is a list of the various URL style socket transports
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that PHP has built-in for use with the streams based socket
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functions such as <function>fsockopen</function>, and
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<function>stream_socket_client</function>. These transports do
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<emphasis>not</emphasis> apply to the
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<link linkend="ref.sockets">Sockets Extension</link>.
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</para>
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<para>
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For a list of transports installed in your version of
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<literal>PHP</literal> use <function>stream_get_transports</function>.
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</para>
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<section id="transports.inet">
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<title>Internet Domain: TCP, UDP, SSL, and TLS</title>
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<simpara>PHP 3, PHP 4. <literal>ssl://</literal> & <literal>tls://</literal> since PHP 4.3</simpara>
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<note>
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<simpara>
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If no transport is specified, <literal>tcp://</literal> will be assumed.
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</simpara>
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</note>
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<itemizedlist>
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<listitem><simpara><literal>127.0.0.1</literal></simpara></listitem>
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<listitem><simpara><literal>fe80::1</literal></simpara></listitem>
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<listitem><simpara><literal>www.example.com</literal></simpara></listitem>
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<listitem><simpara><literal>tcp://127.0.0.1</literal></simpara></listitem>
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<listitem><simpara><literal>tcp://fe80::1</literal></simpara></listitem>
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<listitem><simpara><literal>tcp://www.example.com</literal></simpara></listitem>
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<listitem><simpara><literal>udp://www.example.com</literal></simpara></listitem>
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<listitem><simpara><literal>ssl://www.example.com</literal></simpara></listitem>
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<listitem><simpara><literal>tls://www.example.com</literal></simpara></listitem>
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</itemizedlist>
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<simpara>
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Internet Domain sockets expect a port number in addition
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to a target address. In the case of <function>fsockopen</function>
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this is specified in a second parameter and therefore does
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not impact the formatting of transport URL. With
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<function>stream_socket_client</function> and related functions
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as with traditional URLs however, the port number is specified
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as a suffix of the transport URL delimited by a colon.
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</simpara>
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<itemizedlist>
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<listitem><simpara><literal>tcp://127.0.0.1:80</literal></simpara></listitem>
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<listitem><simpara><literal>tcp://[fe80::1]:80</literal></simpara></listitem>
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<listitem><simpara><literal>tcp://www.example.com:80</literal></simpara></listitem>
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</itemizedlist>
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<note>
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<title>IPv6 numeric addresses with port numbers</title>
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<simpara>
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In the second example above, while the IPv4 and hostname
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examples are left untouched apart from the addition of
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their colon and portnumber, the IPv6 address is wrapped in
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square brackets: <literal>[fe80::1]</literal>. This is to
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distinguish between the colons used in an IPv6 address and
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the colon used to delimit the portnumber.
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</simpara>
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</note>
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<simpara>
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The <literal>ssl://</literal> and <literal>tls://</literal> transports
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(available only when openssl support is compiled into PHP) are extensions
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of the <literal>tcp://</literal> transport which includes SSL encryption.
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Since <literal>PHP 4.3.0</literal> OpenSSL support must be statically
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compiled into <literal>PHP</literal>, since <literal>PHP 5.0.0</literal>
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it may be compiled as a module or statically.
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</simpara>
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<para>
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<table>
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<title>
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Context options for <literal>ssl://</literal> and <literal>tls://</literal>
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transports (since <literal>PHP 4.3.2</literal>)
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</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Usage</entry>
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<entry>Default</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><literal>verify_peer</literal></entry>
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<entry>
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&true; or &false;.
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Require verification of SSL certificate used.
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</entry>
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<entry>&false;</entry>
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</row>
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<row>
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<entry><literal>allow_self_signed</literal></entry>
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<entry>
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&true; or &false;.
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Allow self-signed certificates.
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</entry>
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<entry>&false;</entry>
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</row>
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<row>
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<entry><literal>cafile</literal></entry>
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<entry>
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Location of Certificate Authority file on local filesystem
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which should be used with the <literal>verify_peer</literal>
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context option to authenticate the identity of the remote peer.
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</entry>
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<entry></entry>
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</row>
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<row>
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<entry><literal>capath</literal></entry>
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<entry>
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If <literal>cafile</literal> is not specified or if the certificate
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is not found there, the directory pointed to by <literal>capath</literal>
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is searched for a suitable certificate. <literal>capath</literal>
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must be a correctly hashed certificate directory.
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</entry>
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<entry></entry>
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</row>
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<row>
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<entry><literal>local_cert</literal></entry>
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<entry>
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Path to local certificate file on filesystem. It must be a PEM
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encoded file which contains your certificate and private key.
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It can optionally contain the certificate chain of issuers.
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</entry>
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<entry></entry>
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</row>
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<row>
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<entry><literal>passphrase</literal></entry>
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<entry>
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Passphrase with which your <literal>local_cert</literal> file
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was encoded.
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</entry>
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<entry></entry>
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</row>
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<row>
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<entry><literal>CN_match</literal></entry>
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<entry>
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Common Name we are expecting. PHP will perform limited wildcard
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matching. If the Common Name does not match this, the connection
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attempt will fail.
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</entry>
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<entry></entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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<note>
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<simpara>
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Because <literal>ssl://</literal> is the underlying transport for the
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<link linkend="wrappers.http"><literal>https://</literal></link> and
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<link linkend="wrappers.ftp"><literal>ftps://</literal></link> wrappers,
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any context options which apply to <literal>ssl://</literal> also apply to
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<literal>https://</literal> and <literal>ftps://</literal>.
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</simpara>
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</note>
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</section>
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<section id="transports.unix">
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<title>Unix Domain: Unix and UDG</title>
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<simpara>
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<literal>unix://</literal> since <literal>PHP 3</literal>,
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<literal>udg://</literal> since <literal>PHP 5</literal>
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</simpara>
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<itemizedlist>
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<listitem><simpara><literal>unix:///tmp/mysock</literal></simpara></listitem>
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<listitem><simpara><literal>udg:///tmp/mysock</literal></simpara></listitem>
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</itemizedlist>
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<simpara>
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<literal>unix://</literal> provides access to a socket stream
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connection in the Unix domain. <literal>udg://</literal> provides
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an alternate transport to a Unix domain socket using the user datagram
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protocol.
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</simpara>
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<simpara>
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Unix domain sockets, unlike Internet domain sockets, do not expect
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a port number. In the case of <function>fsockopen</function> the
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<parameter>portno</parameter> parameter should be set to 0.
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</simpara>
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</section>
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</appendix>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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