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Kaurov: checked bugs

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Subject:Kaurov: checked bugs
Summary:I'm not author of this class, but I checked some errors. Result:
Messages:1
Author:Kaurov Eugene
Date:2004-12-27 07:37:38
 

  1. Kaurov: checked bugs   Reply   Report abuse  
Picture of Kaurov Eugene
Kaurov Eugene
2004-12-27 07:37:38
<?php
/**
* A script that reads xml documents without the need of an external library
* Useful for reading configuration data or content data, that would otherwise
* have been placed in a db
*
* known bugs/limitations :
* + doesn't cope well with erraneous files - so be sure to validate
* + a lot of the special tags like doctype etc. aren't handled well
* + external doctype definitions are accepted though (but ignored)
* + methods and behaviour doesn't follow the W3C DOM specification correctly, although mostly.
* usage :
* <code>
* // open and read file
* $xml =& new xmlParser($filename);
* // parse document and return rootnode
* $doc =& $xml->getDocument();
* </code>
*
* disclaimer :
* this piece of code is freely usable by anyone. if it makes your life better,
* remember me in your eveningprayer. if it makes your life worse, try doing it any
* better yourself.
*
* @version 4. aug. 04
* @author troels@kyberfabrikken.dk
* @download http://www.phpclasses.org/
* @package xmllib


* @last edition (12.12.2004): cleared bugs with parsing empty tags (as <tag atribute='art' />)
and getting attributes from tag more then second level. And corrected getting lenght of empty tags.
Added function for printing multilevel objects and arrays: it is usefull for control during you develop your paser
* @Editor: Kaurov Eugene, Ukraine, Poltava
* @homepage: http://kaurov.poltav.com
* @package xmllib kaurov edition
*/

/**
* A generic implementation of a DOM node.
* Somehow follows the specs at w3c
* @see http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/
* @package xmllib
*/
class Node
{
/**
* Holds the attributes of the node
* @var array
* @access public
*/
var $attributes;

/**
* Holds the children of the node
* @var array
* @access private
*/
var $children;

/**
* The nodeName
* @var string
* @access private
*/
var $nodeName;

/**
* The nodeType
* @var int
* @access private
*/
var $nodeType;

/**
* Reference to parent node
* @var reference
* @access private
*/
var $parent;

/**
* Internally used by the parser
* @var int
* @access private
*/
var $_end;

/**
* Constructor
* @param string $nodeName The name of the node to construct
* @param int $nodeType The type of the node to construct.
* @see createChild
*/
function Node($nodeName='node', $nodeType=1)
{
//modified by Kaurov Eugene
//it most useful for printing as tree: small elements before.
$this->nodeName = $nodeName;
$this->nodeType = $nodeType; // 1=element
$this->attributes=array();
$this->children = array();
$this->parent = null;
/* in native version was:
$this->nodeName = $nodeName;
$this->children = array();
$this->attributes = array();
$this->parent = null;
$this->nodeType = $nodeType; // 1=element*/
}

/**
* Factorymethod.
* Constructs a child node, and returns it.
* @param string $nodeName The name of the node to construct
* @param int $nodeType The type of the node to construct.
* @return Node
*/
function &createChild($nodeName=null, $nodeType=1)
{
// create new instance of this class
$params = ($nodeName == null) ? "();" : "(\$nodeName, \$nodeType);";
eval("\$n =& new ".get_class($this).$params);
$this->appendChild($n);
return $n;
}

/**
* @param Node $orphan The node to adopt
* @deprecated
* @see appendChild
*/
function adopt(&$orphan)
{
$this->appendChild($orphan);
}

/**
* Assigns a node as child to current node
* @param Node $orphan The node to adopt
*/
function appendChild(&$orphan)
{
$orphan->parent =& $this;
$this->children[] =& $orphan;
$this->children[count($this->children)-1];
}

/**
* Removes the child node indicated by oldChild from the list of children, and returns it.
* @param Node $orphan The node to adopt
* @returns Node
*/
function & removeChild(&$oldChild)
{
$_children = array();
$notFound = true;
for ($i=0;$i<count($this->children);$i++) {
if ($oldChild !== $this->children[$i]) {
$_children[] =& $this->children[$i];
$notFound = false;
}
}
if ($notFound) {
trigger_error('oldChild is not a child of this node', E_USER_NOTICE);
return null;
}
$this->children = $_children;
$oldChild->parent = null;
return $oldChild;
}

/**
* Replaces the child node oldChild with newChild in the list of children, and returns
* the oldChild node. If the newChild is already in the tree, it is first removed.
* @param Node $newChild The new node to put in the child list.
* @param Node $oldChild The node being replaced in the list.
* @returns Node The node replaced.
*/
function & replaceChild(&$newChild, &$oldChild)
{
$notFound = true;
for ($i=0;$i<count($this->children);$i++) {
if ($oldChild !== $this->children[$i]) {
$this->children[$i] = null;
$this->children[$i] =& $newChild;
$newChild->parent =& $this;
$notFound = false;
}
}
if ($notFound) {
trigger_error('oldChild is not a child of this node', E_USER_NOTICE);
return null;
}
$oldChild->parent = null;
return $oldChild;
}

/**
* Fetch the last childnode, or null
* @param string $nodeName If supplied, only nodes of that nodeName will be returned
* @return Node
*/
function &lastChild($nodeName=null)
{
if (count($this->children)==0)
return null;
if ($nodeName == null)
return $this->children[count($this->children)-1];
for ($i=count($this->children);$i>=0;$i--) {
$c =& $this->children[$i];
if (($nodeName == null) || ($c->nodeName == $nodeName))
return $c;
}
return null;
}

/**
* Fetch the first childnode, or null
* @param string $nodeName If supplied, only nodes of that nodeName will be returned
* @return Node
*/
function &firstChild($nodeName=null)
{
if (count($this->children)==0)
return null;
if ($nodeName == null)
return $this->children[0];
for ($i=0;$i<count($this->children);$i++)
{
$c =& $this->children[$i];
if (($nodeName == null) || ($c->nodeName() == $nodeName)) return $c;
}
return null;
}

/**
* This is a convenience method to allow easy determination of whether a node has any children.
* @see hasChildNodes
* @return bool
*/
function hasChildren()
{
return (count($this->children)>0);
}

/**
* This is a convenience method to allow easy determination of whether a node has any children.
* @see hasChildren
* @return bool
*/
function hasChildNodes()
{
return $this->hasChildren();
}

/**
* Fetch array of childnodes.
* @param string $nodeName If supplied, only nodes of that nodeName will be returned
* @param string $nodeType If supplied, only nodes of that nodeType will be returned
* @see childNodes
* @return array
*/
function children($nodeName=null, $nodeType=null)
{
$ret = array();
for ($i=0;$i<count($this->children);$i++) {
$c =& $this->children[$i];
if ((($nodeName == null) || ($c->nodeName() == $nodeName)) && (($nodeType == null) || ($c->nodeType() == $nodeType)))
$ret[count($ret)] =& $c;
}
return $ret;
}

/**
* Alias for children()
* @see children
*/
function childNodes($nodeName=null, $nodeType=null)
{
return $this->children($nodeName, $nodeType);
}

/**
* Iterates through the nodes children, looking for the first node with specified id.
* @return Node
*/
function &getElementById($id)
{
if (isset($this->attributes['id']) && $this->attributes['id'] == $id)
return $this;
for ($i=0;$i<count($this->children);$i++) {
$node =& $this->children[$i]->getElementById($id);
if (is_object($node))
return $node;
}
return null;
}

/**
* Finds the greatest used id + 1 (next free id)
* @return int
*/
function getCardinality()
{
$cardinal = 0;
if (isset($this->attributes['id']))
$cardinal = $this->attributes['id'] + 1;
for ($i=0;$i<count($this->children);$i++) {
$tmp = $this->children[$i]->getCardinality();
if ($tmp > $cardinal)
$cardinal = $tmp;
}
return $cardinal;
}

/**
* If the returned value is null, the node is the topmost (root)
* @deprecated
* @see parentNode
* @return Node
*/
function &parent()
{
return $this->parentNode();
}

/**
* If the returned value is null, the node is the topmost (root)
* @return Node
*/
function &parentNode()
{
return $this->parent;
}

/**
* Retrieves the name of the node
* @note In older versions of xmllib, nodeName was (wrongly) called type.
* @return string
*/
function nodeName()
{
return $this->nodeName;
}

/**
* Retrieves the type of the node
* @note In older versions of xmllib, nodeName was called type.
* @return int
*/
function nodeType()
{
return $this->nodeType;
}

/**
* Retrieves the named attribute.
* @note It's legal to accees $this->attributes directly, but this presents a more clean way of accomplishing it.
* @param string $name Name of the attribute to retrieve.
* @return string
*/
function getAttribute($name)
{
return (isset($this->attributes[$name])) ? $this->attributes[$name] : null;
}

/**
* Sets the value of the named attribute.
* @param string $name Name of the attribute to retrieve.
* @param string $value Value to assign to the node. Only scalar values are allowed.
* @return bool
*/
function setAttribute($name, $value)
{
if (!is_scalar($value)) {
trigger_error("Only scalar values are allowed as attribute values.", E_USER_WARNING);
return false;
}
$this->attributes[$name] = $value;
return true;
}

/**
* Removes a named attribute
* @param string $name Name of the attribute to retrieve.
*/
function removeAttribute($name)
{
$_attributes = array();
for ($i=0, $keys=array_keys($this->attributes); $i < count($keys); $i++) {
if ($keys[$i] != $name)
$_attributes[] = $this->attributes[$keys[$i]];
}
$this->attributes =& $_attributes;
}

/**
* Fetch the value of this node, depending on its type.
* @return string
*/
function nodeValue()
{
if (isset($this->attributes['value']))
return $this->attributes['value'];
if (count($this->children('#cdata-section')) == 1) {
$n = $this->firstChild('#cdata-section');
return $n->data;
}
if (count($this->children('#text')) == 1) {
$n = $this->firstChild('#text');
return $n->data;
}
return null;
}

/**
* Escape html-entities for flash
* For some reason flash doesn't seem to recognize the htmlentities
* for singlequote, lesser than and greater than
* @param string $str String to escape
* @return string
*/
function flash_escape($str)
{
$translation_table = array();
$translation_table['&'] = '&amp;';
$translation_table['"'] = '&quot;';
$translation_table["'"] = '&#039;';
$translation_table['<'] = '&#060;';
$translation_table['>'] = '&#062;';
return strtr($str, $translation_table);
}

/**
* Escapes string with different protocols
* Allowed values for translation param are :
* + htmlentities
* + htmlspecialchars
* + addslashes
* + flash_escape
* @param string $str String to escape
* @param string $translation The mode to translate the string by
* @return string
*/
function escape($str, $translation)
{
switch ($translation) {
case 'flash_escape' : return Node::flash_escape($str);
case 'addslashes' : return addslashes($str);
case 'htmlspecialchars' : return htmlspecialchars($str);
case 'htmlentities' : return htmlentities($str);
}
trigger_error("unknown translation : ".$translation, E_USER_WARNING);
return $str;
}

/**
* decodes c-style slashes and html-entities (unicode ones too)
* @param string $str Encoded string
* @return string
*/
function unescape($str)
{
$translation_table = array_flip(get_html_translation_table(HTML_ENTITIES));
$ret = strtr(stripslashes($str), $translation_table);
return preg_replace('/&#(\d+);/me', "chr('\\1')",$ret);
}

/**
* Recursively transforms node into string
* @see escape
* @param bool $add_formatting If true, blocks get indented
* @param string $att_escape Translation to use.
* @param string $str String to escape
* @return string
*/
function toString($add_formatting=false, $att_escape='addslashes')
{
$indent = "";
$toadd = "";
$indent_minus_one = "";
if ($add_formatting) {
$toadd = "\n";
for ($p = $this->parent(); $p != null; $p = $p->parent()) {
if ($indent != "")
$indent_minus_one .= "\t";
$indent .= "\t";
}
}

if ($this->nodeType() == 3) {
return Node::escape($this->data, $att_escape);
} else if ($this->nodeType() == 4) {
if (strpos($this->data, '<![CDATA[') !== false) {
trigger_error("illegal content. cdata-section can't contain the string : <![CDATA[", E_USER_WARNING);
}
if (strpos($this->data, ']]>') !== false) {
trigger_error("illegal content. cdata-section can't contain the string : ]]>", E_USER_WARNING);
}
return $toadd.$indent."<![CDATA[".$this->data."]]>".$toadd.$indent_minus_one;
} else if ($this->nodeType() == 8) {
return $toadd.$indent."<!--".$this->data."-->".$toadd.$indent_minus_one;
} else if ($this->nodeType() != 1) {
trigger_error("unsupported nodetype : ".$this->nodeType(), E_USER_WARNING);
}

$a = "";
foreach ($this->attributes as $name => $value) {
$value = Node::escape($value, $att_escape);
$a .= " ".$name."=\"".$value."\"";
}
if ((count($this->children) == 0)) {
return $indent."<".$this->nodeName().$a." />";
}
$ret = $indent."<".$this->nodeName().$a.">";
if ((count($this->children(null,1)) == 0)) {
// only text/cdata nodes contained
foreach ($this->children as $child) {
$ret .= $child->toString($add_formatting, $att_escape);
}
$ret .= "</".$this->nodeName().">";
} else {
$ret .= $toadd;
foreach ($this->children as $child) {
$ret .= $child->toString($add_formatting, $att_escape);
$ret .= $toadd;
}
$ret .= $indent."</".$this->nodeName().">";
}
return $ret;
}

/**
* Outputs document to browser, complete with header
* Param encoding works with :
* + UTF-8
* + ISO-8859-1
* but may work with other encodings too.
* @param string $encoding The document encoding.
*/
function dump($encoding='utf-8')
{
header ("Content-Type: application/xml");

echo "<?xml version=\"1.0\" encoding=\"".$encoding."\" ?>\n";
if ($encoding == 'utf-8') {
echo utf8_encode($this->toString(true, 'flash_escape'));
} else {
echo $this->toString(true, 'flash_escape');
}
}

/**
* Writes document to file
* @param string $filename The filename to write to
* @param string $encoding The document encoding.
*/
function toFile($filename, $encoding='utf-8')
{
$content = "<?xml version=\"1.0\" encoding=\"".$encoding."\" ?>\n";
if ($encoding == 'utf-8') {
$content .= utf8_encode($this->toString(true, 'flash_escape'));
} else {
$content .= $this->toString(true, 'flash_escape');
}
$fp = fopen($filename,'wb');
fwrite($fp, $content);
fclose($fp);
}

/**
* Makes a html decorated version of the document. Usefull for debugging.
* @see toString
* @return string Document as html-formatted string
*/
function toHtml()
{
return nl2br(str_replace('&lt;', '<strong>&lt;', str_replace('&gt;', '&gt;</strong>', str_replace("\t",'&nbsp;&nbsp;&nbsp;&nbsp;',htmlentities($this->toString(true, 'htmlentities'))))));
}

/**
* Translates the document into an associative array.
* @param Node $node From where to start the recursion. You shouldn't use this.
* @return array
*/
function toArray($node=null)
{
if ($node == null) $node = $this;
if ((isset($node->attributes['type']) && ($node->attributes['type'] == 'array') || $node->nodeName() == 'array')) {
$a = array();
$c =& $node->children();
for ($i=0; $i < count($c); $i++) {
if (in_array($c[$i]->nodeType(), array(1,3,4))) {
array_push($a, Node::toArray($c[$i]));
}
}
return $a;
}

if (!$node->hasChildren()) {
if (count($node->attributes)>0)
return $node->attributes;
return $node->nodeValue();
}
$a = array();
$c =& $node->children();
for ($i=0; $i < count($c); $i++) {
if (in_array($c[$i]->nodeType(), array(1,3,4))) {
$v = $c[$i]->nodeValue();
if ($v !== null)
$a[$c[$i]->nodeName()] = $v;
else
$a[$c[$i]->nodeName()] = Node::toArray($c[$i]);
}
}
return $a;
}
}





/**
* The xml-parser. Used to parse a document into a tree of nodes.
* @access public
* @package xmllib
*/
class xmlParser
{
/**
* @access private
*/
var $parse_stack;

/**
* @access private
*/
var $data;

/**
* @access private
*/
var $encoding;

/**
* @access private
*/
var $casefolding;

/**
* Constructor
* @param string $filename If a filename is given, the document will be loaded and prepared
* @param boolean $casefolding If true, uppercase nodenames and attributenames are converted to lowercase
*/
function xmlParser($filename=null, $casefolding=false)
{
$this->casefolding = $casefolding;
if (is_string($filename)) {
$this->loadFromFile($filename);
}
}

/**
* Loads and prepares a file
* @param string $filename name of the file
*/
function loadFromFile($filename)
{
if (!function_exists('file_get_contents')) {
$fp = fopen($filename,'rb');
$size = filesize($filename);
$contents = fread($fp,$size);
fclose($fp);
} else $contents = file_get_contents($filename);
$this->loadFromString($contents);
}

/**
* Loads a xml-document and prepares the parsing
* @param string $contents the document
*/
function loadFromString($contents)
{
$this->parse_stack = array();

// find xml opening tag
$pos1 = strpos($contents, "<?xml");
if ($pos1 === false) {
trigger_error ("not xml", E_USER_ERROR);
}
// find xml opening tag terminator
$pos2 = strpos($contents, "?>");
if ($pos2 === false) {
trigger_error ("not xml", E_USER_ERROR);
}
// find the encoding
$xml_att = substr($contents, $pos1, $pos2);
$pos3 = strpos($xml_att, "encoding=\"");
if ($pos3 === false) {
$this->encoding = "utf-8";
} else {
$xml_att_enc = substr($xml_att, $pos3+10, $pos2);
$pos4 = strpos($xml_att_enc, "\"");
if ($pos3 === false) {
} else {
$this->encoding = strtolower(substr($xml_att_enc, 0, $pos4));
}
}

if ($this->encoding == "utf-8") {
$contents = utf8_decode($contents);
$pos2 = strpos($contents, "?>");
}

// strip xml opening tag
$this->data = substr($contents, $pos2+2);


// find doctype tag if any
$pos = strpos($this->data, "<!DOCTYPE");
if ($pos !== false)
{
// find doctype tag terminator
$pos = strpos($this->data, ">");
if ($pos === false) {
trigger_error ("xml parse error", E_USER_ERROR);
}
$this->data = substr($this->data, $pos+1);
}


//replace bad symbols
//added by Kaurov Eugene
$this->data=str_replace(" ", " ", $this->data);
$this->data=str_replace("'", "\"", $this->data);
}

/**
* Parses the loaded document
* @returns Node The rootnode of the document
*/
function getDocument()
{
$tags = $this->parse_tags();
return $this->parse_tree($tags);
}

/**
* @access private
*/
function stack_push($nodeName, $pos, $a_begin)
{
$nodeName = strtolower($nodeName);
if (!isset($this->parse_stack[$nodeName]) || ($this->parse_stack[$nodeName] == null))
$this->parse_stack[$nodeName] = array();
$t = new Tag($nodeName);
$t->begin = $pos;
$t->a_begin = $a_begin;
array_push($this->parse_stack[$nodeName], $t);
}

/**
* @access private
*/
function stack_pop($nodeName, $pos)
{
$nodeName = strtolower($nodeName);
if (($this->parse_stack[$nodeName] == null) || (count($this->parse_stack[$nodeName])==0))
trigger_error("xml_malformed unmatched closing tag [tag=".$nodeName." pos=".$pos."]", E_USER_ERROR);

$t = array_pop($this->parse_stack[$nodeName]);
$t->end = $pos;
return $t;
}

/**
* @access private
*/
function cmp($a, $b)
{
if ($a->begin == $b->begin) return 0;
return ($a->begin > $b->begin) ? 1 : -1;
}

/**
* eh .. a hack really ... but it works, so who cares
* @access private
*/
function add_textnode($textnode_begin, $textnode_end)
{
$t = new Tag('#text');
$t->nodeType = 3;
$t->begin = $textnode_begin+1;
$t->end = $textnode_end-1;
$t->data = Node::unescape(substr($this->data, $textnode_begin, $textnode_end - $textnode_begin));
$t->begin;
return $t;
}

/**
* @access private
*/
function parse_tags()
{
$valid =
array( 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','-','_',':',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
$parse_tags = array();
$len = strlen($this->data);
$textnode_begin = -1;
for ($i=0;$i<$len;$i++)
{
$n = $i+1;
if (substr($this->data, $i, 9) == '<![CDATA[')
{
if ($textnode_begin > -1)
{
array_push($parse_tags, $this->add_textnode($textnode_begin, $i));
$textnode_begin = -1;
}
$t = new Tag('#cdata-section');
$t->nodeType = 4;
$t->begin = $i+9;
for ($i=$t->begin;substr($this->data, $i, 3) != ']]>';$i++) ;
$t->end = $i;
$i=$i+2;
$t->data = substr($this->data, $t->begin, $t->end - $t->begin);
array_push($parse_tags, $t);
} else
if (substr($this->data, $i, 4) == '<!--')
{
if ($textnode_begin > -1) {
array_push($parse_tags, $this->add_textnode($textnode_begin, $i));
$textnode_begin = -1;
}
$t = new Tag('#comment');
$t->nodeType = 8;
$t->begin = $i+4;
for ($i=$t->begin;substr($this->data, $i, 3) != '-->';$i++) ;
$t->end = $i;
$i=$i+2;
$t->data = substr($this->data, $t->begin, $t->end - $t->begin);
array_push($parse_tags, $t);
} else
if (($this->data{$i} == '<') && ($n<$len) && ($this->data{$n} == '/'))
{
if ($textnode_begin > -1) {
array_push($parse_tags, $this->add_textnode($textnode_begin, $i));
$textnode_begin = -1;
}
// closing tag
$n++;
for ($c=$this->data{$n++},$nodeName=''; in_array($c, $valid); $c=$this->data{$n++}) $nodeName .= $c;
array_push($parse_tags, $this->stack_pop($nodeName, $i-1));
$i = $n-1;
} else if ($this->data{$i} == '<')
{
if ($textnode_begin > -1) {
array_push($parse_tags, $this->add_textnode($textnode_begin, $i));
$textnode_begin = -1;
}
// opening tag
for ($c=$this->data{$n++},$nodeName=''; in_array($c, $valid); $c=$this->data{$n++}) $nodeName .= $c;
for ($a=$n--;($this->data{$n}!='>') && !(($this->data{$n-1}=='/') && ($this->data{$n}=='>')); $n++) { ; } // this part holds the attributes
if ($this->casefolding) $nodeName = strtolower($nodeName);
if ($this->data{$n-1} == '/') {
// single-style closing
$t = new Tag($nodeName);
$t->begin = $n; //n+1; it's value of native version, but it's make error with parsing tags without values like <tag/>. Kaurov
$t->end = $n; //$n+1; it's value of native version, but it's make error with parsing tags without values like <tag/>. Kaurov
$t->a_begin = $a;
array_push($parse_tags, $t);
} else {
$this->stack_push($nodeName, $n+1, $a);
}
$i = $n;
} else
if ($textnode_begin == -1 && (ord($this->data{$i}) > 32))
{
$textnode_begin = $i;
}
}
usort($parse_tags, array('xmlParser', 'cmp'));
return $parse_tags;
}


/**
* @access private
*/
function loadAttributes(&$node, $data)
{
if ($node->nodeType != 1)
return ;
$valid = array( 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','-','_',':',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
$len = strlen($data);
$name = null;
$value = null;
for ($i=0;$i<$len;$i++)
{
if ($value === null)
{ // reading name
if ($data{$i} == '=')
{ // end of name
$value = '';
$escapes = 0;
$i++; // skip opening quote
} else
if (in_array($data{$i}, $valid))
{ // add to name
if ($name === null) $name = $data{$i};
else $name .= $data{$i};
}
} else
{ // reading value
if ($data{$i} == "\\")
$escapes++;
if ($data{$i} == "\"" && ($escapes == 0))
{ // closing quote
if ($this->casefolding) $name = strtolower($name);
$node->attributes[$name] = Node::unescape($value);
$name = null;
$value = null;
} else
{ // add to value
$value .= $data{$i};
}
if ($data{$i-1} == "\\")
$escapes--;
}
}
}

/**
* @access private
*/
function parse_tree($tags)
{
for ($r=null, $i=0; $i<count($tags); $i++)
{
if ($r == null)
{
$r = $tags[$i]->toNode();
$r->_end = strlen($this->data);
if ($tags[$i]->a_begin != $tags[$i]->begin){
$this->loadAttributes(&$r, substr($this->data, $tags[$i]->a_begin, ($tags[$i]->begin - $tags[$i]->a_begin)-1));
}
$p =& $r;
} else {
$n = $tags[$i]->toNode();
if ($tags[$i]->a_begin != $tags[$i]->begin){
$this->loadAttributes(&$n, substr($this->data, $tags[$i]->a_begin, ($tags[$i]->begin - $tags[$i]->a_begin)-1));
}
while ($p->_end < $tags[$i]->begin) $p =& $p->parent;
$n->parent =& $p;
array_push($p->children, $n);
$p =& $p->lastChild();
}
}
return $r;
}


//functions of this class, given below
//are added by Kaurov Eugene

//For any access. This function print simple tree
//for control arrays and object during programmer
//develop it.
function print_tree($r, $parently='', $child_print=false)
{
foreach ($r as $name => $value){
if (is_array($value)){
echo "<br>$parently $name = $value:";
if ($name!='children'||$child_print) $this->print_tree($value, $parently."....");
} elseif(is_object($value)){
echo "<br>$parently $name = $value: ";
if ($name!='parent') $this->print_tree($value, $parently."...."); else if (isset($value->nodeName)) echo $value->nodeName;
}else
echo "<br>$parently $name = $value";
}
}


}


/**
* Used by the parser, as an intermediate before becomming a node
* @access private
* @package xmllib
*/
class Tag
{
var $nodeName;
var $begin;
var $end;
var $a_begin;

function Tag($nodeName)
{
$this->nodeName = $nodeName;
$this->nodeType = 1;
$this->data = null;
}

function toNode()
{
$n = new Node($this->nodeName);
$n->nodeType = $this->nodeType;
$n->_end = $this->end;
$n->data = $this->data;
return $n;
}
}
?>