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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<chapter xml:id="stream.contexts" xmlns="http://docbook.org/ns/docbook">
<title>Stream Contexts</title>
<simpara>
A <literal>context</literal> is a set of <literal>parameters</literal> and
wrapper specific <literal>options</literal> which modify or enhance the
behavior of a stream. <literal>Contexts</literal> are created using
<function>stream_context_create</function> and can be passed to most
filesystem related stream creation functions (i.e. <function>fopen</function>,
<function>file</function>, <function>file_get_contents</function>, etc...).
</simpara>
<simpara>
<literal>Options</literal> can be specified when calling
<function>stream_context_create</function>, or later using
<function>stream_context_set_option</function>.
A list of wrapper specific <literal>options</literal> can be found in the
<xref linkend="context" /> chapter.
</simpara>
<simpara>
<literal>Parameters</literal> can be specified for
<literal>contexts</literal> using the
<function>stream_context_set_params</function> function.
</simpara>
</chapter>
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