<?
/*
(c) 2000 hans anderson corporation. all rights reserved.
you are free to use and modify this class under the same
guidelines found in the php license.
-----------
bugs/me:
http://www.hansanderson.com/php/
me@hansanderson.com
showstv@163.com
-----------
version 1.0
- 1.0 is the first actual release of the class. it's
finally what i was hoping it would be, though there
are likely to still be some bugs in it. this is
a much changed version, and if you have downloaded
a previous version, this won't work with your existing
scripts! you'll need to make some simple changes.
- .92 fixed bug that didn't include tag attributes
(to use attributes, add _attributes[array_index]
to the end of the tag in question:
$xml_html_head_body_img would become
$xml_html_head_body_img_attributes[0],
for example)
-- thanks to nick winfield <nick@wirestation.co.uk>
for reporting this bug.
- .91 no longer requires php4!
- .91 now all elements are array. using objects has
been discontinued.
*/
class xml_container{
function store($k,$v) {
$this->{$k}[] = $v;
}
}
/* parses the information */
/*********************************
* 类定义开始
*
*********************************/
class xml{
// initialize some variables
var $current_tag=array();
var $xml_parser;
var $version = 1.0;
var $tagtracker = array();
/* here are the xml functions needed by expat */
/* when expat hits an opening tag, it fires up this function */
function startelement($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 on for this tag */
if(isset($this->tagtracker["$curtag"])) {
$this->tagtracker["$curtag"]++;
}
else{
$this->tagtracker["$curtag"]=0;
}
/* if there are attributes for this tag, we 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",$attrs);
}
}// end function startelement
/* when expat hits a closing tag, it fires up this function */
function endelement($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 more
// 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 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($td);
return true;
} // end function endelement
/* when expat finds some internal tag character data,
it fires up this function */
function characterdata($parser, $cdata) {
$curtag = implode("_",$this->current_tag); // piece together tag
$this->tagdata["$curtag"] .= $cdata;
}
function xml($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($this->xml_parser));
}
// we are done with the parser, so let's free it
xml_parser_free($this->xml_parser);
}//end constructor: function xml()
}//thus, we end our class xml
?>
操作方法：
require('class.xml.php');
$file = "data.xml";
$data = implode("",file($file)) or die("could not open xml input file");
$obj = new xml($data,"xml");
print $xml["hans"][0]->num_results[0];
for($i=0;$i<sizeof($xml["hans"]);$i++) {
print $xml["hans"][$i]->tag[0] . " ";
}
to print url attributes (if they exist):
print $xml["hans"][0]->attributes[0]["size"];
