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>stream_context_get_default</H1
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><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'] = $value</TT
>.
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><B
>例 1. Using <B
CLASS="function"
>stream_context_get_default()</B
></B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br />$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
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><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
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