xmlToArrayParser.class.php

<?php
class xmlToArrayParser { 
  /** The array created by the parser can be assigned to any variable: $anyVarArr = $domObj->array.*/ 
  public  $array = array(); 
  public  $parse_error = false; 
  private $parser; 
  private $pointer; 
  
  /** Constructor: $domObj = new xmlToArrayParser($xml); */ 
  public function __construct($xml) { 
    $this->pointer =& $this->array; 
    $this->parser = xml_parser_create("UTF-8"); 
    xml_set_object($this->parser, $this); 
    xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, false); 
    xml_set_element_handler($this->parser, "tag_open", "tag_close"); 
    xml_set_character_data_handler($this->parser, "cdata"); 
    $this->parse_error = xml_parse($this->parser, ltrim($xml))? false : true; 
  } 
  
  /** Free the parser. */ 
  public function __destruct() { xml_parser_free($this->parser);} 

  /** Get the xml error if an an error in the xml file occured during parsing. */ 
  public function get_xml_error() { 
    if($this->parse_error) { 
      $errCode = xml_get_error_code ($this->parser); 
      $thisError =  "Error Code [". $errCode ."] \"<strong style='color:red;'>" . xml_error_string($errCode)."</strong>\", 
                            at char ".xml_get_current_column_number($this->parser) . " 
                            on line ".xml_get_current_line_number($this->parser).""; 
    }else $thisError = $this->parse_error; 
    return $thisError; 
  } 
  
  private function tag_open($parser, $tag, $attributes) { 
    $this->convert_to_array($tag, 'attrib'); 
    $idx=$this->convert_to_array($tag, 'cdata'); 
    if(isset($idx)) { 
      $this->pointer[$tag][$idx] = Array('@idx' => $idx,'@parent' => &$this->pointer); 
      $this->pointer =& $this->pointer[$tag][$idx]; 
    }else { 
      $this->pointer[$tag] = Array('@parent' => &$this->pointer); 
      $this->pointer =& $this->pointer[$tag]; 
    } 
    if (!empty($attributes)) { $this->pointer['attrib'] = $attributes; } 
  } 

  /** Adds the current elements content to the current pointer[cdata] array. */ 
  private function cdata($parser, $cdata) { $this->pointer['cdata'] = trim($cdata); } 

  private function tag_close($parser, $tag) { 
    $current = & $this->pointer; 
    if(isset($this->pointer['@idx'])) {unset($current['@idx']);} 
    
    $this->pointer = & $this->pointer['@parent']; 
    unset($current['@parent']); 
    
    if(isset($current['cdata']) && count($current) == 1) { $current = $current['cdata'];} 
    else if(empty($current['cdata'])) {unset($current['cdata']);} 
  } 
  
  /** Converts a single element item into array(element[0]) if a second element of the same name is encountered. */ 
  private function convert_to_array($tag, $item) { 
    if(isset($this->pointer[$tag][$item])) { 
      $content = $this->pointer[$tag]; 
      $this->pointer[$tag] = array((0) => $content); 
      $idx = 1; 
    }else if (isset($this->pointer[$tag])) { 
      $idx = count($this->pointer[$tag]); 
      if(!isset($this->pointer[$tag][0])) { 
        foreach ($this->pointer[$tag] as $key => $value) { 
            unset($this->pointer[$tag][$key]); 
            $this->pointer[$tag][0][$key] = $value; 
    }}}else $idx = null; 
    return $idx; 
  } 
}