Classes in PHP-manipulating XML (3)

/* Here are the XML functions needed by expat * *


/* When expat hits a opening tag, it fires up this function * *

function startelement ($parser, $name, $attrs) {

Array_push ($this->current_tag, $name); Add tag to the cur. Tag array

$curtag = Implode ("_", $this->current_tag); Piece together Tag

/* This tracks what array index we are in for this tag */

if (Isset ($this->tagtracker["$curtag"])) {
$this->tagtracker["$curtag"]++;
} else {
$this->tagtracker["$curtag"]=0;
}


/* If there are attributes for this tag, we have set them here. */

if (count ($attrs) >0) {
$j = $this->tagtracker["$curtag"];
if (! $j) $j = 0;

if (!is_object ($GLOBALS [$this->identifier]["$curtag"] [$j])) {
$GLOBALS [$this->identifier]["$curtag"] [$j] = new Xml_container;
}

$GLOBALS [$this->identifier]["$curtag"] [$j]->store ("Attributes", $attrs);
}

}//End Function startelement



/* When expat hits a closing tag, it fires the up this function * *

function EndElement ($parser, $name) {

$curtag = Implode ("_", $this->current_tag); Piece together Tag
Before we pop it off,
So we can get the correct
Cdata

if (! $this->tagdata["$curtag"]) {
$popped = Array_pop ($this->current_tag); Or else we screw up where we are
Return If we have no data for the tag
} else {
$TD = $this->tagdata["$curtag"];
unset ($this->tagdata["$curtag");
}

$popped = Array_pop ($this->current_tag);
We want the tag name for
The tag above this, it
Allows us to group the
Tags together in a
Intuitive Way.

if (sizeof ($this->current_tag) = = 0) return; If we aren ' t in a tag

$curtag = Implode ("_", $this->current_tag); Piece together Tag
This time is for the arrays

$j = $this->tagtracker["$curtag"];
if (! $j) $j = 0;

if (!is_object ($GLOBALS [$this->identifier]["$curtag"] [$j])) {
$GLOBALS [$this->identifier]["$curtag"] [$j] = new Xml_container;
}

$GLOBALS [$this->identifier]["$curtag"] [$j]->store ($name, $TD); # $this->tagdata["$curtag"]);
Unset ($TD);
return TRUE;
}



/* When Expat finds some internal tag character data,
It fires up this function * *

function Characterdata ($parser, $cdata) {
$curtag = Implode ("_", $this->current_tag); Piece together Tag
$this->tagdata["$curtag"]. = $cdata;
}


/* This is the constructor:automatically called then the class is initialized * *

function XML ($data, $identifier = ' xml ') {

$this->identifier = $identifier;

Create parser Object
$this->xml_parser = Xml_parser_create ();

Set up some options and handlers
Xml_set_object ($this->xml_parser, $this);
Xml_parser_set_option ($this->xml_parser,xml_option_case_folding,0);
Xml_set_element_handler ($this->xml_parser, "startelement", "endelement");
Xml_set_character_data_handler ($this->xml_parser, "Characterdata");

if (!xml_parse ($this->xml_parser, $data, TRUE)) {
sprintf ("XML error:%s at line%d")
Xml_error_string (Xml_get_error_code ($this->xml_parser)),
Xml_get_current_line_number ($this->xml_parser));
}

We are done with the parser
Xml_parser_free ($this->xml_parser);

}//End constructor:function XML ()


}//Thus, we end class XML

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