Why not sort the output? Have you by the assorted xml a performance advantage?
I do not understand what you are doing but this code should work:
PHP Code:
<?php
/////////////////////////////sort xml////////////////////////////////////////////////////
$url = 'test.xml';
$sortXML = new cams();
$arr=$sortXML->load($url);
foreach($arr->element as $item) {
$items[] = $item;
};
usort ($items, function($a, $b ) {
return strcmp($a->person->age[0] , $b->person->age[0]);
});
// save array to xml
$sortXML->save('test.xml',$items);
///////////////////////////
// class
//
class cams {
public function load($fname) {
$doc = new DOMDocument();
if($doc->load($fname)) {
$res= simplexml_load_file($fname);
} else {
throw new Exception('error load XML');
}
return $res;
}
//save array to xml
public function save($fname, $rows) {
$doc = new DOMDocument('1.0','utf-8');
$doc->formatOutput = true;
$elements = $doc->appendChild($doc->createElement('root'));
foreach($rows as $row){
$element=$elements->appendChild($doc->createElement('element'));
foreach($row as $field_name=>$field_value) {
$f=$element->appendChild($doc->createElement($field_name));
if($field_name=='about') {
foreach($field_value as $field_name=>$field_value) {
$description=$f->appendChild($doc->createElement($field_name));
$description->appendChild($doc->createTextNode($field_value));
}
}
elseif($field_name=='person') {
foreach($field_value as $field_name=>$field_value) {
$description=$f->appendChild($doc->createElement($field_name));
$description->appendChild($doc->createTextNode($field_value));
}
} else {
$f->appendChild($doc->createTextNode($field_value));
}
}
}
file_put_contents($fname, $doc->saveXML());
}
}
?>
The code would still be optimized
