php-doc-en/faq/html.xml

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 <chapter id="faq.html">
  <title>PHP and HTML</title>
  <titleabbrev>PHP and HTML</titleabbrev>

   <para>
    PHP and HTML interact a lot : PHP generate HTML, and HTML
    has informations that will be sent to PHP.
   </para>

  <qandaset>
   <qandaentry id="faq.html.arrays">
    <question>
     <para>How do I create arrays in a HTML &lt;form&gt;?</para>
    </question>
    <answer>
     <para>
      To get your &lt;form&gt; result sent as an array to your PHP script
      you name the &lt;input&gt;, &lt;select&gt; or &lt;textarea&gt;
      elements like this:
      <programlisting>
      &lt;input name="MyArray[]"&gt;
      &lt;input name="MyArray[]"&gt;
      &lt;input name="MyArray[]"&gt;
      &lt;input name="MyArray[]"&gt;
      </programlisting>
      Notice the square brackets after the variable name, that's what
      makes it an array. You can group the elements into different arrays
      by assigning the same name to different elements:
      <programlisting>
      &lt;input name="MyArray[]"&gt;
      &lt;input name="MyArray[]"&gt;
      &lt;input name="MyOtherArray[]"&gt;
      &lt;input name="MyOtherArray[]"&gt;
      </programlisting>
      This produces two arrays, MyArray and MyOtherArray, that gets sent
      to the PHP script.
      </para>
      <para>
      <emphasis>Note that you must not use indices with arrays in HTML!</emphasis>
      The array gets filled in the order the elements appear in the form. For
      functions you can use to process these arrays once you get them into
      your scripts, please see the Arrays section in the manual.
     </para>
    </answer>
   </qandaentry>

  </qandaset>
 </chapter>

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