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：

<?php/** * xml2array() will convert the given XML text to an array in the XML structure.  * Link: http://www.bin-co.com/php/scripts/xml2array/  * Arguments : $contents - The XML text  * $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.  * $priority - Can be 'tag' or 'attribute'. This will change the way the resulting array sturcture. For 'tag', the tags are given more importance. * Return: The parsed XML in an array form. Use print_r() to see the resulting array structure.  * Examples: $array = xml2array(file_get_contents('feed.xml'));  * $array = xml2array(file_get_contents('feed.xml', 1, 'attribute')); */function xml2array($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"); // http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss   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();  $current = &$xml_array; //Refference   // Go through the tags.  $repeated_tag_index = array(); //Multiple tags with same name will be turned into an array   foreach($xml_values as $data) {    unset($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 => $val) {        if ($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 '<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 ($type == "complete") { // Tags that ends in 1 line '<tag />'      // See if the key is already taken.      if (!isset($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 '</tag>'      $current = &$parent[$level-1];    }   }   return($xml_array);} // Array to XMLclass array2xml {  public $output = "<?xml version=/"1.0/" encoding=/"utf-8/"?>/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));          $xml .= "<{$fk}>" . $this->xmlmake($value, $key) . "</{$fk}>";        } else {          $xml .= "<{$key}>" . $this->xmlmake($value, $key) . "</{$key}>";        }       } else {        $xml .= "<{$key}>{$value}</{$key}>/n";      }     }     return $xml;  }   public function output(){    foreach($this->sub_item as $t){      $this->output = str_replace("<{$t}><{$t}>","<{$t}>",$this->output);      $this->output = str_replace("</{$t}></{$t}>","</{$t}>",$this->output);    }    return $this->output;  }}