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<?
header('content-type: text/plain');
// define hooks to rss_parser class as xml functions do not allow object methods as handlers.
function rss_start_element($parser, $name, $attributes) {
global $rss;
$rss->start_element($parser, $name, $attributes);
}
function rss_end_element($parser, $name) {
global $rss;
$rss->end_element($parser, $name);
}
function rss_character_data($parser, $data) {
global $rss;
$rss->character_data($parser, $data);
}
class rss_parser {
// constructor. setup parser options and handlers.
function rss_parser() {
$this->error = '';
$this->file = '';
$this->channel = array();
$this->data = '';
$this->stack = array();
$this->num_items = 0;
$this->xml_parser = xml_parser_create();
xml_set_element_handler($this->xml_parser, "rss_start_element", "rss_end_element");
xml_set_character_data_handler($this->xml_parser, "rss_character_data");
}
function character_data($parser, $data) {
if (empty($this->data)) $this->data = trim($data); // concatenate non-parsed data...
else $this->data .= ' '.trim($data); // and get rid of white space.
}
function start_element($parser, $name, $attrs) {
switch($name) {
case 'RSS':
break;
case 'CHANNEL':
break;
case 'IMAGE':
array_push($this->stack, $name);
break;
case 'ITEM':
array_push($this->stack, $name);
array_push($this->stack, $this->num_items); // push item index.
$this->item[$this->num_items] = array();
$this->num_items++;
break;
case 'TEXTINPUT':
array_push($this->stack, $name);
break;
default:
array_push($this->stack, $name);
break;
}
}
function end_element($parser, $name) {
switch ($name) {
case 'RSS':
break;
case 'CHANNEL':
break;
case 'IMAGE':
array_pop($this->stack);
break;
case 'ITEM':
array_pop($this->stack);
array_pop($this->stack);
break;
case 'TEXTINPUT':
array_pop($this->stack);
break;
default: // child element.
$element = (implode("']['",$this->stack));
eval("\$this->channel['$element']=\$this->data;"); // this does all the hard work.
array_pop($this->stack);
$this->data = '';
break;
}
}
function parse() {
if (!($fp = @fopen($this->file, "r"))) {
$this->error = "Could not open RSS source \"$this->file\".";
return false;
}
while ($data = fread($fp, 4096)) {
if (!xml_parse($this->xml_parser, $data, feof($fp))) {
$this->error = sprintf("XML error: %s at line %d.",
xml_error_string(xml_get_error_code($this->xml_parser)),
xml_get_current_line_number($this->xml_parser));
return false;
}
}
xml_parser_free($this->xml_parser);
return true;
}
} // class rss_parser.
// try it out...
$rss = new rss_parser();
$rss->file = 'http://freebsddiary.org/news.php3';
$rss->parse() or die($rss->error);
if ($rss->error) print $rss->error;
print_r($rss->channel); // PHP 4 needed for this to work.
?> |
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