<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML ><HEAD ><TITLE >stream_socket_client</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Manual PHP" HREF="index.html"><LINK REL="UP" TITLE="Stream Functions" HREF="ref.stream.html"><LINK REL="PREVIOUS" TITLE="stream_socket_accept" HREF="function.stream-socket-accept.html"><LINK REL="NEXT" TITLE="stream_socket_get_name" HREF="function.stream-socket-get-name.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-2"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Manual PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.stream-socket-accept.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.stream-socket-get-name.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.stream-socket-client" ></A >stream_socket_client</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN111873" ></A ><P > (PHP 5)</P >stream_socket_client -- Open Internet or Unix domain socket connection </DIV ><DIV CLASS="refsect1" ><A NAME="AEN111876" ></A ><H2 >Description</H2 >resource <B CLASS="methodname" >stream_socket_client</B > ( string remote_socket [, int &errno [, string &errstr [, float timeout [, int flags [, resource context]]]]])<BR ></BR ><P > Initiates a stream or datagram connection to the destination specified by <VAR CLASS="parameter" >remote_socket</VAR >. The type of socket created is determined by the transport specified using standard URL formatting: <VAR CLASS="literal" >transport://target</VAR >. For Internet Domain sockets (AF_INET) such as TCP and UDP, the <VAR CLASS="literal" >target</VAR > portion of the <VAR CLASS="parameter" >remote_socket</VAR > parameter should consist of a hostname or IP address followed by a colon and a port number. For Unix domain sockets, the <VAR CLASS="parameter" >target</VAR > portion should point to the socket file on the filesystem. The optional <VAR CLASS="parameter" >timeout</VAR > can be used to set a timeout in seconds for the connect system call. <VAR CLASS="parameter" >flags</VAR > is a bitmask field which may be set to any combination of connection flags. Currently the selection of connection flags is limited to <TT CLASS="constant" ><B >STREAM_CLIENT_ASYNC_CONNECT</B ></TT > and <TT CLASS="constant" ><B >STREAM_CLIENT_PERSISTENT</B ></TT >. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Notã: </B > If you need to set a timeout for reading/writing data over the socket, use <A HREF="function.stream-set-timeout.html" ><B CLASS="function" >stream_set_timeout()</B ></A >, as the <VAR CLASS="parameter" >timeout</VAR > parameter to <B CLASS="function" >stream_socket_client()</B > only applies while connecting the socket. </P ></BLOCKQUOTE ></DIV ><P > <B CLASS="function" >stream_socket_client()</B > returns a stream resource which may be used together with the other file functions (such as <A HREF="function.fgets.html" ><B CLASS="function" >fgets()</B ></A >, <A HREF="function.fgetss.html" ><B CLASS="function" >fgetss()</B ></A >, <A HREF="function.fwrite.html" ><B CLASS="function" >fwrite()</B ></A >, <A HREF="function.fclose.html" ><B CLASS="function" >fclose()</B ></A >, and <A HREF="function.feof.html" ><B CLASS="function" >feof()</B ></A >). </P ><P > If the call fails, it will return <TT CLASS="constant" ><B >FALSE</B ></TT > and if the optional <VAR CLASS="parameter" >errno</VAR > and <VAR CLASS="parameter" >errstr</VAR > arguments are present they will be set to indicate the actual system level error that occurred in the system-level <VAR CLASS="literal" >connect()</VAR > call. If the value returned in <VAR CLASS="parameter" >errno</VAR > is <VAR CLASS="literal" >0</VAR > and the function returned <TT CLASS="constant" ><B >FALSE</B ></TT >, it is an indication that the error occurred before the <VAR CLASS="literal" >connect()</VAR > call. This is most likely due to a problem initializing the socket. Note that the <VAR CLASS="parameter" >errno</VAR > and <VAR CLASS="parameter" >errstr</VAR > arguments will always be passed by reference. </P ><P > Depending on the environment, the Unix domain or the optional connect timeout may not be available. A list of available transports can be retrieved using <A HREF="function.stream-get-transports.html" ><B CLASS="function" >stream_get_transports()</B ></A >. See <A HREF="transports.html" >Anexa N</A > for a list of built in transports. </P ><P > The stream will by default be opened in blocking mode. You can switch it to non-blocking mode by using <A HREF="function.stream-set-blocking.html" ><B CLASS="function" >stream_set_blocking()</B ></A >. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN111937" ></A ><P ><B >Exemplu 1. <B CLASS="function" >stream_socket_client()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$fp </font><font color="#007700">= </font><font color="#0000BB">stream_socket_client</font><font color="#007700">(</font><font color="#DD0000">"tcp://www.example.com:80"</font><font color="#007700">, </font><font color="#0000BB">$errno</font><font color="#007700">, </font><font color="#0000BB">$errstr</font><font color="#007700">, </font><font color="#0000BB">30</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$fp</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"$errstr ($errno)<br /></font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />} else {<br /> </font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n"</font><font color="#007700">);<br /> while (!</font><font color="#0000BB">feof</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">)) {<br /> echo </font><font color="#0000BB">fgets</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">1024</font><font color="#007700">);<br /> }<br /> </font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > The example below shows how to retrieve the day and time from the UDP service "daytime" (port 13) in your own machine. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN111941" ></A ><P ><B >Exemplu 2. Using UDP connection</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$fp </font><font color="#007700">= </font><font color="#0000BB">stream_socket_client</font><font color="#007700">(</font><font color="#DD0000">"udp://127.0.0.1:13"</font><font color="#007700">, </font><font color="#0000BB">$errno</font><font color="#007700">, </font><font color="#0000BB">$errstr</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$fp</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"ERROR: $errno - $errstr<br /></font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />} else {<br /> </font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"\n"</font><font color="#007700">);<br /> echo </font><font color="#0000BB">fread</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">26</font><font color="#007700">);<br /> </font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <DIV CLASS="warning" ><P ></P ><TABLE CLASS="warning" BORDER="1" WIDTH="100%" ><TR ><TD ALIGN="CENTER" ><B >Avertisment</B ></TD ></TR ><TR ><TD ALIGN="LEFT" ><P > UDP sockets will sometimes appear to have opened without an error, even if the remote host is unreachable. The error will only become apparent when you read or write data to/from the socket. The reason for this is because UDP is a "connectionless" protocol, which means that the operating system does not try to establish a link for the socket until it actually needs to send or receive data. </P ></TD ></TR ></TABLE ></DIV > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Notã: </B >When specifying a numerical IPv6 address (e.g. fe80::1) you must enclose the IP in square brackets. For example, <VAR CLASS="literal" >tcp://[fe80::1]:80</VAR >.</P ></BLOCKQUOTE ></DIV ><P > See also <A HREF="function.stream-socket-server.html" ><B CLASS="function" >stream_socket_server()</B ></A >, <A HREF="function.stream-set-blocking.html" ><B CLASS="function" >stream_set_blocking()</B ></A >, <A HREF="function.stream-set-timeout.html" ><B CLASS="function" >stream_set_timeout()</B ></A >, <A HREF="function.stream-select.html" ><B CLASS="function" >stream_select()</B ></A >, <A HREF="function.fgets.html" ><B CLASS="function" >fgets()</B ></A >, <A HREF="function.fgetss.html" ><B CLASS="function" >fgetss()</B ></A >, <A HREF="function.fwrite.html" ><B CLASS="function" >fwrite()</B ></A >, <A HREF="function.fclose.html" ><B CLASS="function" >fclose()</B ></A >, <A HREF="function.feof.html" ><B CLASS="function" >feof()</B ></A >, and the <A HREF="ref.curl.html" >Curl extension</A >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.stream-socket-accept.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Acasã</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.stream-socket-get-name.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >stream_socket_accept</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.stream.html" ACCESSKEY="U" >Sus</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >stream_socket_get_name</TD ></TR ></TABLE ></DIV ></BODY ></HTML >