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【PHP】 XML与数据格式进行转换类
作者:qita.in / 发布于2012/10/22/ 534
XML与数据格式进行转换类
<div><?php</div>
<div>/**</div>
<div>* xml2array() will convert the given XML text to an array in the XML structure.</div>
<div>* Link: http://www.bin-co.com/php/scripts/xml2array/</div>
<div>* Arguments : $contents - The XML text</div>
<div>* $get_attributes - 1 or 0. If this is 1 the function will get the attributes as well as the tag values - this results in a different array structure in the return value.</div>
<div>* $priority - Can be 'tag' or 'attribute'. This will change the way the resulting array sturcture. For 'tag', the tags are given more importance.</div>
<div>* Return: The parsed XML in an array form. Use print_r() to see the resulting array structure.</div>
<div>* Examples: $array = xml2array(file_get_contents('feed.xml'));</div>
<div>* $array = xml2array(file_get_contents('feed.xml', 1, 'attribute'));</div>
<div>*/</div>
<div>function xml2array($contents, $get_attributes = 1, $priority = 'tag') {</div>
<div>  if (!$contents) return array();</div>
<div></div>
<div>  if (!function_exists('xml_parser_create')) {</div>
<div>    // print "'xml_parser_create()' function not found!";</div>
<div>    return array();</div>
<div>  }
<div>  // Get the XML parser of PHP - PHP must have this module for the parser to work</div>
<div>  $parser = xml_parser_create('');</div>
<div>  xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); # http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss</div>
<div>  xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);</div>
<div>  xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);</div>
<div>  xml_parse_into_struct($parser, trim($contents), $xml_values);</div>
<div>  xml_parser_free($parser);</div>
<div></div>
<div>  if (!$xml_values) return; //Hmm... </div>
<div>  // Initializations</div>
<div>  $xml_array = array();</div>
<div>  $parents = array();</div>
<div>  $opened_tags = array();</div>
<div>  $arr = array();</div>
<div></div>
<div>  $current = &$xml_array; //Refference </div>
<div>  // Go through the tags.</div>
<div>  $repeated_tag_index = array(); //Multiple tags with same name will be turned into an array</div>
<div>  foreach($xml_values as $data) {</div>
<div>    unset($attributes, $value); //Remove existing values, or there will be trouble </div>
<div>    // This command will extract these variables into the foreach scope</div>
<div>    // tag(string), type(string), level(int), attributes(array).</div>
<div>    extract($data); //We could use the array by itself, but this cooler.</div>
<div>    $result = array();</div>
<div>    $attributes_data = array();</div>
<div></div>
<div>    if (isset($value)) {</div>
<div>      if ($priority == 'tag') $result = $value;</div>
<div>      else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode</div>
<div>    }
<div>    // Set the attributes too.</div>
<div>    if (isset($attributes) and $get_attributes) {</div>
<div>      foreach($attributes as $attr => $val) {</div>
<div>        if ($priority == 'tag') $attributes_data[$attr] = $val;</div>
<div>        else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'</div>
<div>      }
<div>    }
<div>    // See tag status and do the needed.</div>
<div>    if ($type == "open") { // The starting of the tag '<tag>'</div>
<div>      $parent[$level-1] = &$current;</div>
<div>      if (!is_array($current) or (!in_array($tag, array_keys($current)))) { // Insert New tag</div>
<div>        $current[$tag] = $result;</div>
<div>        if ($attributes_data) $current[$tag . '_attr'] = $attributes_data;</div>
<div>        $repeated_tag_index[$tag . '_' . $level] = 1;</div>
<div></div>
<div>        $current = &$current[$tag];</div>
<div>      } else { // There was another element with the same tag name</div>
<div>        if (isset($current[$tag][0])) { // If there is a 0th element it is already an array</div>
<div>          $current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;</div>
<div>          $repeated_tag_index[$tag . '_' . $level]++;</div>
<div>        } else { // This section will make the value an array if multiple tags with the same name appear together</div>
<div>          $current[$tag] = array($current[$tag], $result); //This will combine the existing item and the new item together to make an array</div>
<div>          $repeated_tag_index[$tag . '_' . $level] = 2;</div>
<div></div>
<div>          if (isset($current[$tag . '_attr'])) { // The attribute of the last(0th) tag must be moved as well</div>
<div>            $current[$tag]['0_attr'] = $current[$tag . '_attr'];</div>
<div>            unset($current[$tag . '_attr']);</div>
<div>          }
<div>        }
<div>        $last_item_index = $repeated_tag_index[$tag . '_' . $level]-1;</div>
<div>        $current = &$current[$tag][$last_item_index];</div>
<div>      }
<div>    } elseif ($type == "complete") { // Tags that ends in 1 line '<tag />'</div>
<div>      // See if the key is already taken.</div>
<div>      if (!isset($current[$tag])) { // New Key</div>
<div>        $current[$tag] = $result;</div>
<div>        $repeated_tag_index[$tag . '_' . $level] = 1;</div>
<div>        if ($priority == 'tag' and $attributes_data) $current[$tag . '_attr'] = $attributes_data;</div>
<div>      } else { // If taken, put all things inside a list(array)</div>
<div>        if (isset($current[$tag][0]) and is_array($current[$tag])) { // If it is already an array...</div>
<div>          // ...push the new element into that array.</div>
<div>          $current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;</div>
<div></div>
<div>          if ($priority == 'tag' and $get_attributes and $attributes_data) {</div>
<div>            $current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;</div>
<div>          }
<div>          $repeated_tag_index[$tag . '_' . $level]++;</div>
<div>        } else { // If it is not an array...</div>
<div>          $current[$tag] = array($current[$tag], $result); //...Make it an array using using the existing value and the new value</div>
<div>          $repeated_tag_index[$tag . '_' . $level] = 1;</div>
<div>          if ($priority == 'tag' and $get_attributes) {</div>
<div>            if (isset($current[$tag . '_attr'])) { // The attribute of the last(0th) tag must be moved as well</div>
<div>              $current[$tag]['0_attr'] = $current[$tag . '_attr'];</div>
<div>              unset($current[$tag . '_attr']);</div>
<div>            }
<div></div>
<div>            if ($attributes_data) {</div>
<div>              $current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;</div>
<div>            }
<div>          }
<div>          $repeated_tag_index[$tag . '_' . $level]++; //0 and 1 index is already taken</div>
<div>        }
<div>      }
<div>    } elseif ($type == 'close') { // End of tag '</tag>'</div>
<div>      $current = &$parent[$level-1];</div>
<div>    }
<div>  }
<div></div>
<div>  return($xml_array);</div>
<div>}
<div></div>
<div>// Array to XML</div>
<div>class array2xml {</div>
<div>  public $output = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";</div>
<div>  public $sub_item = array();</div>
<div>  public function __construct($array) {</div>
<div>    $sub_item = array();</div>
<div>    $this->output .= $this->xmlmake($array);</div>
<div>  }
<div>  public function xmlmake($array, $fk = '') {</div>
<div>    $xml = '';</div>
<div>    global $sub_item;</div>
<div>    foreach ($array as $key => $value) {</div>
<div>      if (is_array($value)) {</div>
<div>        if (is_numeric($key)) {</div>
<div>          $this->sub_item=array_merge($this->sub_item,array($fk));</div>
<div>          $xml .= "<{$fk}>" . $this->xmlmake($value, $key) . "</{$fk}>";</div>
<div>        } else {</div>
<div>          $xml .= "<{$key}>" . $this->xmlmake($value, $key) . "</{$key}>";</div>
<div>        }
<div>      } else {</div>
<div>        $xml .= "<{$key}>{$value}</{$key}>\n";</div>
<div>      }
<div>    }
<div>    return $xml;</div>
<div>  }
<div>  public function output(){</div>
<div>    foreach($this->sub_item as $t){</div>
<div>      $this->output = str_replace("<{$t}><{$t}>","<{$t}>",$this->output);</div>
<div>      $this->output = str_replace("</{$t}></{$t}>","</{$t}>",$this->output);</div>
<div>    }
<div>    return $this->output;</div>
<div>  }
<div>}
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