Traversing a Tree of XML Nodes Using On-Demand Functions : DomDocument « XML « PHP






  1. PHP
  2. XML
  3. DomDocument

Traversing a Tree of XML Nodes Using On-Demand Functions

 
<?php

$doc = new DomDocument("1.0");
$doc->loadXML( file_get_contents("data.xml") );
$root = $doc->firstChild;
$pointer = $root;

do {
  print $pointer->tagName."<br />\n";
} while ( $pointer = next_element( $pointer ) );

function next_element( DomNode $pointer ) {
  while ( $pointer = next_node( $pointer ) ) {
    if ( $pointer->nodeType == XML_ELEMENT_NODE ) {
      return $pointer;
    }
  }
  return false;
}

function next_node( DomNode $pointer ) {
  if ( $pointer->hasChildNodes() ) {
    return $pointer->firstChild ;
  }
  if ( $next = $pointer->nextSibling ) {
    return $next;
  }
  while( $pointer = $pointer->parentNode ) {
    if ( $next=$pointer->nextSibling ) {
      return $next;
    }
  }
}
?>








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