<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >stream_context_get_default</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="Stream Functions" HREF="ref.stream.html"><LINK REL="PREVIOUS" TITLE="stream_context_create" HREF="function.stream-context-create.html"><LINK REL="NEXT" TITLE="stream_context_get_options" HREF="function.stream-context-get-options.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></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" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.stream-context-create.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.stream-context-get-options.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.stream-context-get-default" ></A >stream_context_get_default</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN222693" ></A ><P > (PHP 5 >= 5.1.0RC1)</P >stream_context_get_default -- Retreive the default streams context</DIV ><DIV CLASS="refsect1" ><A NAME="AEN222696" ></A ><H2 >Description</H2 >resource <B CLASS="methodname" >stream_context_get_default</B > ( [array options] )<BR ></BR ><P > Returns the default stream context which is used whenever file operations (<A HREF="function.fopen.html" ><B CLASS="function" >fopen()</B ></A >, <A HREF="function.file-get-contents.html" ><B CLASS="function" >file_get_contents()</B ></A >, etc...) are called without a context parameter. Options for the default context can optionally be specified with this function using the same syntax as <A HREF="function.stream-context-create.html" ><B CLASS="function" >stream_context_create()</B ></A >. </P ><P > <CODE CLASS="parameter" >options</CODE > must be an associative array of associative arrays in the format <TT CLASS="literal" >$arr['wrapper']['option'] = $value</TT >. </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN222711" ></A ><P ><B >例 1. Using <B CLASS="function" >stream_context_get_default()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$default_opts </font><font color="#007700">= array(<br /> </font><font color="#DD0000">'http'</font><font color="#007700">=>array(<br /> </font><font color="#DD0000">'method'</font><font color="#007700">=></font><font color="#DD0000">"GET"</font><font color="#007700">,<br /> </font><font color="#DD0000">'header'</font><font color="#007700">=></font><font color="#DD0000">"Accept-language: en\r\n" </font><font color="#007700">. <br /> </font><font color="#DD0000">"Cookie: foo=bar"</font><font color="#007700">,<br /> </font><font color="#DD0000">'proxy'</font><font color="#007700">=></font><font color="#DD0000">"tcp://10.54.1.39:8000"<br /> </font><font color="#007700">)<br />);<br /><br /><br /></font><font color="#0000BB">$alternate_opts </font><font color="#007700">= array(<br /> </font><font color="#DD0000">'http'</font><font color="#007700">=>array(<br /> </font><font color="#DD0000">'method'</font><font color="#007700">=></font><font color="#DD0000">"POST"</font><font color="#007700">,<br /> </font><font color="#DD0000">'header'</font><font color="#007700">=></font><font color="#DD0000">"Content-type: application/x-www-form-urlencoded\r\n" </font><font color="#007700">.<br /> </font><font color="#DD0000">"Content-length: " </font><font color="#007700">. </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#DD0000">"baz=bomb"</font><font color="#007700">),<br /> </font><font color="#DD0000">'content'</font><font color="#007700">=></font><font color="#DD0000">"baz=bomb"<br /> </font><font color="#007700">)<br />);<br /><br /></font><font color="#0000BB">$default </font><font color="#007700">= </font><font color="#0000BB">stream_context_get_default</font><font color="#007700">(</font><font color="#0000BB">$default_opts</font><font color="#007700">);<br /></font><font color="#0000BB">$alternate </font><font color="#007700">= </font><font color="#0000BB">stream_context_create</font><font color="#007700">(</font><font color="#0000BB">$alternate_opts</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Sends a regular GET request to proxy server at 10.54.1.39<br /> * For www.example.com using context options specified in $default_opts<br /> */<br /></font><font color="#0000BB">readfile</font><font color="#007700">(</font><font color="#DD0000">'http://www.example.com'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Sends a POST request directly to www.example.com<br /> * Using context options specified in $alternate_opts<br /> */<br /></font><font color="#0000BB">readfile</font><font color="#007700">(</font><font color="#DD0000">'http://www.example.com'</font><font color="#007700">, </font><font color="#0000BB">false</font><font color="#007700">, </font><font color="#0000BB">$alternate</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P > See also <A HREF="function.stream-context-create.html" ><B CLASS="function" >stream_context_create()</B ></A >, and Listing of supported wrappers with context options (<A HREF="wrappers.html" >附录 N</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-context-create.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.stream-context-get-options.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >stream_context_create</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.stream.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >stream_context_get_options</TD ></TR ></TABLE ></DIV ></BODY ></HTML >