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<refentry xml:id="function.socket-connect" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>socket_connect</refname>
  <refpurpose>Initiates a connection on a socket</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>socket_connect</methodname>
   <methodparam><type>Socket</type><parameter>socket</parameter></methodparam>
   <methodparam><type>string</type><parameter>address</parameter></methodparam>
   <methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>port</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Initiate a connection to <parameter>address</parameter> using the <classname>Socket</classname> instance
   <parameter>socket</parameter>, which must be <classname>Socket</classname>
   instance created with <function>socket_create</function>.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>socket</parameter></term>
     <listitem>
      <para>
       A <classname>Socket</classname> instance created with
       <function>socket_create</function>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>address</parameter></term>
     <listitem>
      <para>
       The <parameter>address</parameter> parameter is either an IPv4 address
       in dotted-quad notation (e.g. <literal>127.0.0.1</literal>) if 
       <parameter>socket</parameter> is <constant>AF_INET</constant>, a valid 
       IPv6 address (e.g. <literal>::1</literal>) if IPv6 support is enabled and 
       <parameter>socket</parameter> is <constant>AF_INET6</constant>
       or the pathname of a Unix domain socket, if the socket family is
       <constant>AF_UNIX</constant>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>port</parameter></term>
     <listitem>
      <para>
       The <parameter>port</parameter> parameter is only used and is mandatory
       when connecting to an <constant>AF_INET</constant> or an 
       <constant>AF_INET6</constant> socket, and designates
       the port on the remote host to which a connection should be made.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success; The error code can be retrieved with
   <function>socket_last_error</function>. This code may be passed to
   <function>socket_strerror</function> to get a textual explanation of the
   error.
  </para>
  <note>
   <para>
    If the socket is non-blocking then this function returns &false; with an
    error <literal>Operation now in progress</literal>.
   </para>
  </note>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &sockets.changelog.socket-param;
     <row>
      <entry>8.0.0</entry>
      <entry>
       <parameter>port</parameter> is nullable now.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>socket_bind</function></member>
    <member><function>socket_listen</function></member>
    <member><function>socket_create</function></member>
    <member><function>socket_last_error</function></member>
    <member><function>socket_strerror</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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