php XML file parsing class (with demo code)-PHP Tutorial-php.cn

php XML file parsing class (with demo code)

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Release： 2016-07-25 08:55:21

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/**XML file analysis class
* Date: 2013-02-01
* Author: fdipzone
* Ver: 1.0
* Edition bbs.it-home.org
* func:
* loadXmlFile($xmlfile) reads xml file and outputs Array
* loadXmlString($xmlstring) reads xmlstring and outputs Array
*/
class XMLParser{
/**Read xml file
* @param String $xmlfile
* @return Array
*/
public function loadXmlFile($xmlfile){
// get xmlfile content
$xmlstring = file_exists($xmlfile)? file_get_contents($xmlfile) : '';
// parser xml
list($flag, $data) = $this->parser($xmlstring);
return $this->response($flag, $data);
}
/**读取xmlstring
* @param String $xmlstring
* @return Array
*/
public function loadXmlString($xmlstring){
// parser xml
list($flag, $data) = $this->parser($xmlstring);
return $this->response($flag, $data);
}
/**Interpret xml content
* @param String $xmlstring
* @return Array
*/
private function parser($xmlstring){
$flag = false;
$data = array();
// check xml format
if($this->checkXmlFormat($xmlstring)){
$flag = true;
// xml to object
$data = simpleXML_load_string($xmlstring, 'SimpleXMLElement', LIBXML_NOCDATA);
// object to array
$this->objectToArray($data);
}
return array($flag, $data);
}
/**Check whether the xml format is correct
* @param String $xmlstring
* @return boolean
*/
private function checkXmlFormat($xmlstring){
if($xmlstring==''){
return false;
}
$xml_parser_obj = xml_parser_create();
if(xml_parse_into_struct($xml_parser_obj, $xmlstring, $vals, $indexs)===1){ // 1:success 0:fail
return true;
}else{
return false;
}
}
/**object 转 Array
* @param object $object
* @return Array
*/
private function objectToArray(&$object){
$object = (array)$object;
foreach($object as $key => $value){
if($value==''){
$object[$key] = "";
}else{
if(is_object($value) || is_array($value)){
$this->objectToArray($value);
$object[$key] = $value;
}
}
}
}
/**Output returns
* @param boolean $flag true:false
* @param Array $data converted data
* @return Array
*/
private function response($flag=false, $data=array()){
return array($flag, $data);
}
}
?>

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2，演示示例

require "XMLParser.class.php";
$xmlfile = 'file.xml';
$xmlstring = '
1000
100
fdipzone
1
28
';

echo '

';  </li>
<li>  </li>
<li>$xml_parser = new XMLParser();  </li>
<li>echo "response xmlfilern";  </li>
<li>list($flag, $xmldata) = $xml_parser->loadXmlFile($xmlfile);  </li>
<li>if($flag){  </li>
<li>    print_r($xmldata);  </li>
<li>}  </li>
<li>  </li>
<li>echo "response xmlstringrn";  </li>
<li>list($flag, $xmldata) = $xml_parser->loadXmlString($xmlstring);  </li>
<li>if($flag){  </li>
<li>    print_r($xmldata);  </li>
<li>}  </li>
<li>  </li>
<li>echo '

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附，PHP XML预定义常量: http://bbs.it-home.org/shouce/php5/libxml.constants.html