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PHP

XPath Axes

XMLXPath Axes


The XML Example Document

We will use the following XML document in the examples below.
<?xml version="1.0" encoding="UTF-8"?>

<bookstore>

<book>
  <title lang="en">Harry Potter</title>
  <price>29.99</price>
</book>

<book>
  <title lang="en">Learning XML</title>
  <price>39.95</price>
</book>

</bookstore>

XPath Axes

An axis defines a node-set relative to the current node.
AxisName Result
ancestor Selects all ancestors (parent, grandparent, etc.) of the current node
ancestor-or-self Selects all ancestors (parent, grandparent, etc.) of the current node and the current node itself
attribute Selects all attributes of the current node
child Selects all children of the current node
descendant Selects all descendants (children, grandchildren, etc.) of the current node
descendant-or-self Selects all descendants (children, grandchildren, etc.) of the current node and the current node itself
following Selects everything in the document after the closing tag of the current node
following-sibling Selects all siblings after the current node
namespace Selects all namespace nodes of the current node
parent Selects the parent of the current node
preceding Selects all nodes that appear before the current node in the document, except ancestors, attribute nodes and namespace nodes
preceding-sibling Selects all siblings before the current node
self Selects the current node