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 nameif (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"?>
";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}>
";} } 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;}}希望本文所述对大家的php程序设计有所帮助。