How to modify xml file using PHP

Question

I want to modify my xml file in PHP based on the following criteria.

my xml structure look like this:

Answer 1

preserveWhiteSpace = FALSE;
            
$xml->load("markers.xml");
        
$mar = $xml->getElementsByTagName("marker");
foreach($mar as $row){


            $type = $row->getElementsByTagName('type')->item(0);
            $title = $row->getElementsByTagName('title')->item(0);
            $address = $row->getElementsByTagName('address')->item(0);
            $latitude = $row->getElementsByTagName('latitude')->item(0);
            $longitude = $row->getElementsByTagName('longitude')->item(0);
            
            $row->replaceChild($type, $type);
            $row->replaceChild($title, $title);
            $row->replaceChild($address, $address);
            $row->replaceChild($latitude, $latitude);
            $row->replaceChild($longitude, $longitude);
          
            ?>
            

    

        

            
        
  
    

    
  
    nodeValue = $_POST['type'];    
    $text->nodeValue = $_POST['text'];
    $address->nodeValue = $_POST['address'];
    $latitude->nodeValue = $_POST['latitude'];
    $longitude->nodeValue = $_POST['longitude'];
    $xml->save("markers.xml");
        }
    
}

?>