title: Filter an Xml parsed into a php array
body: <p>Here's my problem, I have an Xml file generated by a rss flux. </p>
  
  <p>I made it into a php array to get the datas easily.</p>
  
  <p>The point is to filter the array with a tag name, an engine research in fact. </p>
  
  <p>Here's my code for the moment :</p>
  
  <pre><code>&lt;?php
  function xml2array($contents, $get_attributes=1, $priority = 'tag') { 
  if(!$contents) return array(); 
  
  if(!function_exists('xml_parser_create')) { 
      //print "'xml_parser_create()' function not found!"; 
      return array(); 
  } 
  
  //Get the XML parser of PHP - PHP must have this module for the parser to work 
  $parser = xml_parser_create(''); 
  xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); 
  xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0); 
  xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1); 
  xml_parse_into_struct($parser, trim($contents), $xml_values); 
  xml_parser_free($parser); 
  
  if(!$xml_values) return;//Hmm... 
  
  //Initializations 
  $xml_array = array(); 
  $parents = array(); 
  $opened_tags = array(); 
  $arr = array(); 
  
  $current = &amp;$xml_array; //Reference 
  
  //Go through the tags. 
  $repeated_tag_index = array();//Multiple tags with same name will be turned into an array 
  foreach($xml_values as $data) { 
      if($data != $mot) {     
          unset($attributes,$value);//Remove existing values, or there will be trouble 
  
      //This command will extract these variables into the foreach scope 
      // tag(string), type(string), level(int), attributes(array). 
          extract($data);//We could use the array by itself, but this cooler. 
  
          $result = array(); 
          $attributes_data = array(); 
  
          if(isset($value)) { 
              if($priority == 'tag') $result = $value; 
              else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
              }
      } 
  
      //Set the attributes too. 
      if(isset($attributes) and $get_attributes) { 
          foreach($attributes as $attr =&gt; $val) { 
              if($priority == 'tag') $attributes_data[$attr] = $val; 
              else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr' 
          } 
      } 
  
      //See tag status and do the needed. 
      if($type == "open") {//The starting of the tag '&lt;tag&gt;' 
          $parent[$level-1] = &amp;$current; 
          if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag 
              $current[$tag] = $result; 
              if($attributes_data) $current[$tag. '_attr'] = $attributes_data; 
              $repeated_tag_index[$tag.'_'.$level] = 1; 
  
              $current = &amp;$current[$tag]; 
  
          } else { //There was another element with the same tag name 
  
              if(isset($current[$tag][0])) {//If there is a 0th element it is already an array 
                  $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result; 
                  $repeated_tag_index[$tag.'_'.$level]++; 
              } else {//This section will make the value an array if multiple tags with the same name appear together
                  $current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
                  $repeated_tag_index[$tag.'_'.$level] = 2; 
  
                  if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                      $current[$tag]['0_attr'] = $current[$tag.'_attr']; 
                      unset($current[$tag.'_attr']); 
                  } 
  
              } 
              $last_item_index = $repeated_tag_index[$tag.'_'.$level]-1; 
              $current = &amp;$current[$tag][$last_item_index]; 
          } 
  
      } elseif($type == "complete") { //Tags that ends in 1 line '&lt;tag /&gt;' 
          //See if the key is already taken. 
          if(!isset($current[$tag])) { //New Key 
              $current[$tag] = $result; 
              $repeated_tag_index[$tag.'_'.$level] = 1; 
              if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data; 
  
          } else { //If taken, put all things inside a list(array) 
              if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array... 
  
                  // ...push the new element into that array. 
                  $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result; 
  
                  if($priority == 'tag' and $get_attributes and $attributes_data) { 
                      $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data; 
                  } 
                  $repeated_tag_index[$tag.'_'.$level]++; 
  
              } else { //If it is not an array... 
                  $current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
                  $repeated_tag_index[$tag.'_'.$level] = 1; 
                  if($priority == 'tag' and $get_attributes) { 
                      if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
  
                          $current[$tag]['0_attr'] = $current[$tag.'_attr']; 
                          unset($current[$tag.'_attr']); 
                      } 
  
                      if($attributes_data) { 
                          $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data; 
                      } 
                  } 
                  $repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken 
              } 
          } 
  
      } elseif($type == 'close') { //End of tag '&lt;/tag&gt;' 
          $current = &amp;$parent[$level-1]; 
      } 
  } 
  
  return($xml_array); 
  }  
  $contents = file_get_contents('magasin.xml');//Or however you what it
  $result = xml2array($contents,0);
  print_r($result);
  ?&gt;
  </code></pre>
  
  <p>So I would want to filter it by a tag (example : Iris) which show every result with this word in it. Can anyone help me ? </p>
  
  <p>Thank you very much...</p>