PHP operation XML Full-featured XML operations Class _php tutorial

The programming House provides a fully functional XML operation class

/* XML Operation class */
Class Operxml
{
var $parser;

Public Function __construct ()
{
$this->parser = Xml_parser_create ();
Xml_parser_set_option ($this->parser, xml_option_case_folding, 0);
Xml_parser_set_option ($this->parser, Xml_option_skip_white, 1);

Xml_set_object ($this->parser, $this);
Xml_set_element_handler ($this->parser, "Tag_open", "tag_close");
Xml_set_character_data_handler ($this->parser, "CDATA");
}

Public Function Parse ($xmlStr = "", $endtag =true)
{
$this->endtag = $endtag;
$this->xmlstr = $xmlStr;
$this->tree = new StdClass;
$this->tree->tag = "root";
$this->tree->props = new StdClass;
$this->tree->children = Array ();
$this->tree->p = NULL;
$this->tree->level =-1;
$this->deep = 0;
$this->plist = Array ($this->tree);
Xml_parse ($this->parser, $this->xmlstr);
if (count ($this->tree->children) >0)
$this->root = $this->tree->children[0];
Else
$ This->root = NULL;
return $this;
}

Public Function Tag_open ($parser, $tag, $attributes)
{
$o = new StdClass;
$o->p = $this->plist[$this->deep];
$o->index = count ($o->p->children);
$o->level = $o->p->level 1;
$o->tag = $tag;
$o->props = new StdClass;
while (list ($key, $value) =each ($attributes))
$o->props->{$key} = $value;
$o->value = "";
$o->children = Array ();
Array_push ($o->p->children, $o);
$this->deep;
$this->plist[$this->deep] = $o;
}

Public Function CDATA ($parser, $cdata)
{
$this->plist[$this->deep]->value = $cdata;
}

Public Function Tag_close ($parser, $tag)
{
$this->deep--;
}

Public Function Getnodebyprop ()//Get node based on attribute name and value,
{//Parameters: Property Name, property value 1, property value 2, property value 3,...
$args = Func_get_args ();
$node = $this->tree;
for ($i =1; $i {
$node = $this->_getnodebyprop ($node, $args [0], $args [$i]);
if ($node ==null) break;
}
return $node;
}

Public Function Getchildbytag ($node, $tag)//Gets the node labeled $tag under the $node node
{
for ($i =0; $i children); $i)
{
if ($node->children[$i]->tag== $tag)
return $node->children[$i];
}
return NULL;
}

Public Function Getchildsbytag ($node, $tag)//Gets the node that is labeled $tag under the $node node and returns an array of node lists
{
$rs = Array ();
for ($i =0; $i children); $i)
if ($node->children[$i]->tag== $tag)
Array_push ($rs, $node->children[$i]);
return $rs;
}

Public Function Addroot ($TAG)//Add root node
{
$this->tree->children = Array ();
$this->root = $this->addchild ($this->tree, $tag);
return $this->root;
}

Public Function AddChild ($node, $tag)//Add a node labeled $tag under the $node node and return the added node
{
$o = new StdClass;
$o->p = $node;
$o->level = $node->level 1;
$o->index = count ($node->children);
$o->tag = $tag;
$o->props = new StdClass;
$o->value = "";
$o->children = Array ();
Array_push ($node->children, $o);
return $o;
}

Public Function Delete ($node)//Delete $node node
{
$p = $node->p;
Array_splice ($p->children, $node->index,1);
for ($i =0; $i children); $i)
$p->children[$i]->index = $i;
}

Public function Move ($dstNode, $srcNode)//move Srcnode to $dstnode
{
$this->delete ($srcNode);
$srcNode->p = $dstNode;
$srcNode->level = $dstNode->level 1;
$srcNode->index = count ($dstNode->children);
Array_push ($dstNode->children, $srcNode);
}

Public Function __tostring ()//return XML format string
{
$s = "";
for ($i =0; $i tree->children); $i)
$s. = $this->traversalnodetoxml ($this->tree->children[$i], $this->endtag);
return $s;
}

Public function Save ($xmlFile)//Save as XML format file
{
$content = $this->__tostring ();

$fp = @fopen ($xmlFile, "w") or Die ("Create file failed:". $xmlFile);
@fwrite ($fp, $content);
@fclose ($FP);
@chmod ($xmlFile, 0777);
}

Private Function Traversalnodetoxml ($treeNode, $endtag)
{
$space = "";
$space = Str_pad ($s, $treeNode->level*2, "", str_pad_left);
$s = $space. " < ". $treeNode->tag;
while (list ($key, $value) =each ($treeNode->props))
$s. = "$key =" $value "";
$childCount = count ($treeNode->children);
if ($childCount ==0)
{
if ($treeNode->value!= "" | | $endtag)
$s. = ">" $treeNode->value. " Tag. " > ";
Else
$s. = "/>";
return $s;
}

$s. = ">";
for ($i =0; $i < $childCount; $i)
$s. = $this->traversalnodetoxml ($treeNode->children[$i], $endtag);
$s. = $space. " Tag. " > ";
return $s;
}

Private Function _getnodebyprop ($node, $propName, $propValue)
{
for ($i =0; $i children); $i)
{
$anode = $node->children[$i];
if (Isset ($anode->props) && isset ($anode

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