How to Filter Nodes Based on Attribute Values in XPath?

Susan Sarandon
Release: 2024-11-09 01:19:02
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How to Filter Nodes Based on Attribute Values in XPath?

Implementing Conditions in XPath

In XPath, you can filter nodes based on specific conditions. This is particularly useful when dealing with large XML documents and retrieving only the nodes that meet certain criteria.

One common condition is to filter based on attribute values. Let's consider the following XML file:

<?xml version="1.0" encoding="UTF-8"?>
<xml>
  <events date="12/12/2010">
    <event>
      <title>JqueryEvent</title>
      <description>
        easily
      </description>
    </event>
  </events>
  <events date="14/12/2011">
    <event>
      <title>automatically onBlur</title>
      <description>
        when a date is selected. For an inline calendar, simply attach the datepicker to a div or span.
      </description>
    </event>
  </events>
</xml>
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To select all events that occurred on a specific date, such as "14/12/2011," you can use the following XPath expression:

//xml/events[@date="14/12/2011"]
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This expression will only select the second "events" node, which has the attribute "date" set to "14/12/2011."

By specifying the date in the XPath expression, you can narrow down your results and retrieve only the nodes that you are interested in.

The above is the detailed content of How to Filter Nodes Based on Attribute Values in XPath?. For more information, please follow other related articles on the PHP Chinese website!

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