PHP实现XML与数据格式进行转换类实例

            本文实例讲述了PHP实现XML与数据格式进行转换类。分享给大家供大家参考。具体如下：
$val) {
        if ($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 ''
      $parent[$level-1] = &$current;
      if (!is_array($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;
        $current = &$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;
        $current = &$current[$tag][$last_item_index];
      }
    } elseif ($type == "complete") { // Tags that ends in 1 line ''
      // See if the key is already taken.
      if (!isset($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 ''
      $current = &$parent[$level-1];
    }
  }
  return($xml_array);
}
// Array to XML
class array2xml {
  public $output = "\n";
  public $sub_item = array();
  public function __construct($array) {
    $sub_item = array();
    $this->output .= $this->xmlmake($array);
  }
  public function xmlmake($array, $fk = '') {
    $xml = '';
    global $sub_item;
    foreach ($array as $key => $value) {
      if (is_array($value)) {
        if (is_numeric($key)) {
          $this->sub_item=array_merge($this->sub_item,array($fk));
          $xml .= "" . $this->xmlmake($value, $key) . "";
        } else {
          $xml .= "" . $this->xmlmake($value, $key) . "";
        }
      } else {
        $xml .= "{$value}\n";
      }
    }
    return $xml;
  }
  public function output(){
    foreach($this->sub_item as $t){
      $this->output = str_replace("","",$this->output);
      $this->output = str_replace("","",$this->output);
    }
    return $this->output;
  }
}
希望本文所述对大家的php程序设计有所帮助。
            
            
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