XML Parsing

ljschrenk

Ok XML Gurus, I need your help. I'm pretty new to these functions so I'm not exactly sure what they do or how I can modify them for my needs. Here's what I'm attempting.....I need to take an XML page and strip out the data. The function I have is fine, except if there's no data the XML page is printing out just a closing tag <tag /> which is throwing my array off. Here's the code....

function characterData($parser, $data)
{
$xmlstream[$i] = $data;
$i++
}

$xml_parser = xml_parser_create();
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
xml_set_character_data_handler($xml_parser, "characterData");

if (!($fp = fopen($file, "r"))) {
die("could not open XML input");
}

while ($data = fread($fp, 4096)) {
if (!xml_parse($xml_parser, $data, feof($fp))) {
die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
}
}
xml_parser_free($xml_parser);

Then I have variables assigned from the array:

$State = $xmlstream[2];
$City = $xmlstream[4]; etc....

basically, whenever it hits an XML tag it's assigning a space to the array:

It will assign data fine only if there is an opening and closing tag, however if there is no data, the XML output is:

which is completely messing up my array count. Does this make sense?

Any help would be greatly appreciated!!!

Thanks!!
Lisa

AdamBrill

Here is an XML parser that I created the other day just for kicks. 😉 It may be easier for you to just use this rather than use yours. I hope you can make use of it, but unfortunately I haven't documented anything on how it works yet, so if you have questions on how it works let me know.

It will return the entire XML file in an array of all of the data...

<?PHP

function start_tag_handler($parser, $name, $attrib){
	global $results, $levels;
	$levels[] = 0;
	eval("\$results[".join($levels,"][")."]['name'] = \$name;");
	eval("\$results[".join($levels,"][")."]['attribs'] = \$attrib;");
}
function end_tag_handler($parser, $name){
	global $results, $levels;

array_splice($levels, count($levels)-1);
@$levels[count($levels)-1]++;
}
function cdata_handler($parser, $value){
	global $results, $levels;
	if(trim($value) != ""){
		eval("\$results[".join($levels,"][")."]['value'] = \$value;");
	}
}
function parse_xml_file($file){
	global $results, $levels;
	$results = array();
	$levels = array();
	$fp = file($file);
	$x = 0;
	$data = "";
	while(@$fp[$x]){
		$data .= $fp[$x];
		$x++;
	}
	$parser = xml_parser_create();
	xml_set_element_handler($parser, 'start_tag_handler', 'end_tag_handler');
	xml_set_character_data_handler($parser, 'cdata_handler');
	xml_parse($parser, $data);
	return $results;
}

echo "<pre>";
print_r(parse_xml_file("path/to/file.xml"));
echo "</pre>";

?>