<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>XPath Testing Environment</title>
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<script language="JavaScript1.2" type="text/javascript">
<!--
// Function to display the selected XML file.
function displayXML ( )
{
// Open a new window containing the XML file.
window.open(document.forms.testsuite.file.value);
}
// Function to evaluate an XPath expression.
function evaluateXPath ( )
{
// Check whether a expression was given.
if ( document.forms.testsuite.expression.value == "" )
{
// Display an error message.
alert("Please insert an XPath expression to be evaluated.");
// Select the field.
document.forms.testsuite.expression.focus();
// Stop the execution of this function.
return;
}
// Submit the form.
document.forms.testsuite.submit();
}
//-->
</script>
</head>
<body>
<form name="testsuite" action="<?php echo $PHP_SELF; ?>" method="post">
<table width="100%" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td class="content">
<span class="header">
XPath Testing Environment
</span>
<hr><br>
<span class="description">
This example is written to show you how you can use the
<a href="http://www.w3.org/TR/xpath" target="_blank">XPath</a>
language to access and even modify XML documents. Please take a look
at the official <a href="http://www.w3.org/TR/xpath" target="_blank">
XPath Recommendation</a> or - which may be better - at the
<a href="http://www.zvon.org/xxl/XPathTutorial/General/examples.html"
target="_blank">ZVON XPath Tutorial</a>. Without knowing the XPath
syntax this example may be very boring... ;-)
</span>
<br><br>
<span class="description">
To test <phpXML/> simply first select the XML file you want to
use for your testing. You can view the content of an XML file by
clicking the <i>Display</i> link. After that insert your XPath
expression and click on the <i>Evaluate</i> link. For enhanced testing,
you can also insert an XPath context. This is the full document path to
a document node, from which the evaluation shall start. You can also
select what to do with the nodes matching your XPath expression. If you
don't known what to do with this enhancing testing, simply leave these
fields blank.
</span>
<br><br>
<hr><br>
<table width="100%" border="0" cellspacing="2" cellpadding="2" align="center">
<tr>
<td nowrap>
<b>XML file:</b>
</td>
<td width="100%">
<select name="file" style="width:100%">
<?php
// Create an object to access the current directory.
$directory = dir(getcwd());
// Run through all files of the current directory.
while ( $entry = $directory->read() )
{
// Check whether it's an XML file.
if ( eregi("\.xml$", $entry) )
{
// Add an entry for this file.
echo "<option value=\"$entry\"";
// Check whether this file is selected.
if ( $entry == $file )
{
// Select the entry.
echo " selected";
}
// Close the option tag.
echo ">$entry</option>\n";
}
}
// Close the directory.
$directory->close();
?>
</select>
</td>
<td nowrap>
[ <a href="javascript:displayXML()">Display</a> ]
</td>
</tr>
<tr>
<td nowrap>
<b>XPath expression:</b>
</td>
<td width="100%">
<input type="text" name="expression" value="<?php echo ( empty($expression) ? "//*" : $expression ); ?>" style="width:100%">
</td>
<td nowrap>
[ <a href="javascript:evaluateXPath()">Evaluate</a> ]
</td>
</tr>
<tr>
<td nowrap>
<b>XPath context:</b>
</td>
<td width="100%">
<input type="text" name="context" value="<?php echo $context; ?>" style="width:100%">
</td>
<td nowrap>
</td>
</tr>
<tr>
<td nowrap>
<b>XPath action:</b>
</td>
<td width="100%">
<select name="action" style="width:100%">
<?php
// Define the available actions.
$actions = array(
"highlight" => "Simply highlight all nodes matching the ".
"XPath expression.",
"remove" => "Remove all nodes matching the XPath ".
"expression."
);
// Now run through the array of actions.
foreach ( $actions as $name => $description )
{
// Create the option tag.
echo "<option value=\"$name\"";
// Check whether the option is selected.
if ( $name == $action )
{
// Select the action.
echo " selected";
}
// Close the option tag.
echo ">$description</option>\n";
}
?>
</select>
</td>
<td nowrap>
</td>
</tr>
</table>
<?php
// Check whether a file and a expression was given.
if ( !empty($file) && !empty($expression) )
{
// Display a separator.
echo "<br><hr><br>";
// Include the <phpXML/> class.
include("xml.php");
// Now create a new object for accessing the XML file.
$xml = new XML($file);
// Evaluate the XPath expression.
$results = $xml->evaluate($expression, $context);
// Now check what action to perform.
if ( $action == "remove" )
{
// Run through all nodes that were found.
foreach ( $results as $result )
{
// Remove the node.
$xml->remove_node($result);
}
// Clear the results.
$results = array();
}
// Now display the content of the XML file.
echo "<pre>";
echo $xml->get_file($results);
echo "</pre>";
}
?>
</td>
</tr>
<tr>
<td class="content">
<hr>
<span class="small">
Copyright © 2001 <a href="mailto:mpm@phpxml.org">Michael P. Mehl</a>.
All rights reserved.
</span>
</td>
</tr>
</table>
</form>
</body>
</html>
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