php-doc-en/reference/strings/functions/parse-str.xml

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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.parse-str">
 <refnamediv>
  <refname>parse_str</refname>
  <refpurpose>Parses the string into variables</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>void</type><methodname>parse_str</methodname>
   <methodparam><type>string</type><parameter>str</parameter></methodparam>
   <methodparam choice="opt"><type>array</type><parameter role="reference">arr</parameter></methodparam>
  </methodsynopsis>
  <para>
   Parses <parameter>str</parameter> as if it were the query string
   passed via a URL and sets variables in the current scope. 
  </para>
  <note>
   <para>
    To get the current <emphasis>QUERY_STRING</emphasis>, you may use the variable
    <varname>$_SERVER['QUERY_STRING']</varname>.
    Also, you may want to read the section on
    <link linkend="language.variables.external">variables from external
    sources</link>.
   </para>
  </note>
  <note>
   <para>
    The <link linkend="ini.magic-quotes-gpc">magic_quotes_gpc</link> setting
    affects the output of this function, as <function>parse_str</function> uses
    the same mechanism that PHP uses to populate the <varname>$_GET</varname>,
    <varname>$_POST</varname>, etc. variables.
   </para>
  </note>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>str</parameter></term>
     <listitem>
      <para>
       The input string.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>arr</parameter></term>
     <listitem>
      <para>
       If the second parameter <parameter>arr</parameter> is present,
       variables are stored in this variable as array elements instead.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.void;
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>4.0.3</entry>
       <entry>
        The <parameter>arr</parameter> parameter was added
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Using <function>parse_str</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$str = "first=value&arr[]=foo+bar&arr[]=baz";
parse_str($str);
echo $first;  // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz

parse_str($str, $output);
echo $output['first'];  // value
echo $output['arr'][0]; // foo bar
echo $output['arr'][1]; // baz

?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>parse_url</function></member>
    <member><function>pathinfo</function></member>
    <member><function>http_build_query</function></member>
    <member><function>get_magic_quotes_gpc</function></member>
    <member><function>urldecode</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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