Edit XML in HTML form and submit to self

Question

I have some data stored in an XML file and want to be able to edit that through an HTML form on a PHP page. In the PHP page I'm calling an XSL file to turn the XML file into an HTML form and this works:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
  <h2>My data</h2>
  <form action="test.php" method="post">
    <table border="1">
      <tr bgcolor="#9acd32">
        <th style="text-align:left">Title</th>
        <th style="text-align:left">Date</th>
      </tr>
      <xsl:for-each select="events/event">
      <tr>
        <td>Title: <input type="text" id="title" name="title" value="{title}"></input></td>
        <td>Date: <input type="text" id="date" name="date" value="{date}"></input></td>
      </tr>
      </xsl:for-each>
      <tr><td></td><td><input type="submit" value="Submit"/></td></tr>
    </table>
  </form>
</xsl:template>
</xsl:stylesheet>

But I want this form to submit to the PHP page that it was called from. This is an XSL file so PHP code isn't being processed so I can't change the form action to:

"<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>

Is it possible to run this PHP code in an XSL file so that it sends the form contents back to the same PHP page?

Answer 1

From php you can call the xsl-transformation using parameters like this:

<?php
$xmlUri      = '/some/path/to/your.xml';
$xslUri      = '/some/path/to/your.xsl';
$xmlDocument = new DOMDocument;
$xslDocument = new DOMDocument;

if ($xmlDocument->load($xmlUri) && $xslDocument->load($xslUri)) {

    $xsltProc = new XSLTProcessor();
    $xsltProc->setParam('php-file', htmlspecialchars($_SERVER['PHP_SELF']));
    if ($xsltProc->importStyleSheet($xslDocument)) {
        echo $xsltProc->transformToXML($xmlDocument);
    }
}

Change your xsl like this:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:param name="php-file"/>
  <xsl:template match="/">
    <h2>My data</h2>
    <form action="{$php-file}" method="post">
      <table border="1">
        <tr bgcolor="#9acd32">
          <th style="text-align:left">Title</th>
          <th style="text-align:left">Date</th>
        </tr>
        <xsl:for-each select="events/event">
          <tr>
            <td>Title: <input type="text" id="title" name="title" value="{title}"></input></td>
            <td>Date: <input type="text" id="date" name="date" value="{date}"></input></td>
          </tr>
        </xsl:for-each>
        <tr><td></td><td><input type="submit" value="Submit"/></td></tr>
      </table>
    </form>
  </xsl:template>
</xsl:stylesheet>

And you are good to go.