| Formally Mikor. Name: Michael Walker Location: East Yorkshire, England Join Date: Aug 2005
Posts: 2,546
NP$: 171.25 ( Donate)
| Simple XML Class
Here is a simple class to parse XML files: PHP Code: // Known Bugs:
// Does not support nesting of complex types eg:
// <tag><tag2><tag3>hi</tag3></tag2></tag>
// would display as tag => null, tag2 => tag3 = "hi"
class parseXML{
// File URL
var $file;
//Private variables
var $parser;
var $data;
var $index_array;
var $data_array;
var $xml;
//Tag variables
var $root_tags = array();
var $sub_tags = array();
function presetRSS(){
// Set up the tags for RSS 2.0
$this->root_tags = array('title', 'link', 'description', 'language', 'lastBuildDate', 'copyright');
$this->sub_tags = array('item' => array('title', 'description', 'link', 'guid', 'pubDate', 'category'));
}
function print_error(){
// Display xml error message
die(sprintf("XML Error: %s at line %d",
xml_error_string(xml_get_error_code($this->parser)),
xml_get_current_line_number($this->parser)
));
}
function parse_file(){
// Create the parser
$this->parser = xml_parser_create();
// Skip whitespace between elements
xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1);
// Disable upper-casing.
xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
// Read the data into $data
$this->data = file_get_contents($this->file);
//parse XML input $data into two arrays:
// $index_array - pointers to the locations of appropriate values in $data_array - data value array.
xml_parse_into_struct($this->parser, $this->data, $this->data_array, $this->index_array) or $this->print_error();
// Stick it all in a nice array
$this->xml = array();
// Handle root tags (format: $xml[tag])
foreach($this->root_tags as $tag){
if(count($this->data_array[$this->index_array[$tag][0]]['xml:attributes']) != 0){
foreach($this->data_array[$this->index_array[$tag][0]]['xml:attributes'] as $akey => $avar){
$this->xml[$tag]['attributes'][$akey] = $avar;
}
}
$this->xml[$tag] = $this->data_array[$this->index_array[$tag][0]]['value'];
}
// Now for child tags (format: $xml[parent][number][child])
foreach($this->sub_tags as $key => $value){
$children = count($this->index_array[$key]) / 2;
$i = 0;
$j = 0;
while ($i < $children){
// Skip every 2nd one, as it is a closing tag and thus has no attributes
if($j % 2 == 0 || $j == 0){
if(count($this->data_array[$this->index_array[$key][$j]]['attributes']) != 0){
foreach($this->data_array[$this->index_array[$key][$j]]['attributes'] as $akey => $avar){
$this->xml[$key][$i]['xml:attributes'][$akey] = $avar;
}
}
foreach($value as $subtag){
if(count($this->data_array[$this->index_array[$subtag][$i]]['attributes']) != 0){
foreach($this->data_array[$this->index_array[$subtag][$i]]['attributes'] as $akey => $avar){
$this->xml[$key][$i][$subtag]['xml:attributes'][$akey] = $avar;
}
}
if(is_array($this->sub_tags[$subtag])){
$this->xml[$key][$i][$subtag] = 'xml:complex_tag';
}else{
$this->xml[$key][$i][$subtag] = $this->data_array[$this->index_array[$subtag][$i]]['value'];
}
}
$i ++;
}
$j ++;
}
}
//unseting XML parser object
xml_parser_free($this->parser);
}
}
Here is an example for parsing RSS 2.0 files (as you can see, there is a function to set the class up for parsing RSS) PHP Code: $xml = new parseXML;
// RSS 2.0 File (only tested with bbc news)
$xml->file = 'http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/front_page/rss.xml';
$xml->presetRSS();
$xml->parse_file();
$parsedXML = $xml->xml;
echo '<pre>';
print_r($parsedXML);
echo '</pre>';
(I can't believe i'm on holiday in Poland, and still doing this)
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