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<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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