一、用法举例:
1、将XML文件解释成便于使用的数组:
- <?php
- include('xml.php'); //引用PHP XML操作类
- $xml = file_get_contents('data.xml'); //读取XML文件
- //$xml = file_get_contents("php://input"); //读取POST过来的输入流
- $data=XML_unserialize($xml);
- echo '<pre>';
- print_r($data);
- echo '</pre>';
- ?>
data.xml文件:
- <?xml version="1.0" encoding="GBK"?>
- <video>
- <upload>
- <videoid>998</videoid>
- <name><![CDATA[回忆未来]]></name>
- <memo><![CDATA[def]]></memo>
- <up_userid>11317</up_userid>
- </upload>
- </video>
利用该XML操作类生成的对应数组(汉字编码:UTF-8):
- Array
- (
- [video] => Array
- (
- [upload] => Array
- (
- [videoid] => 998
- [name] => 回忆未来
- [memo] => def
- [up_userid] => 11317
- )
- )
- )
2、将数组转换成XML文件:
- <?php
- include('xml.php');//引用PHP XML操作类
- $xml = XML_serialize($data);
- ?>
二、PHP XML操作类源代码:
- <?php
- ###################################################################################
- #
- # XML Library, by Keith Devens, version 1.2b
- # <a href="http://keithdevens.com/software/phpxml" target="_blank">http://keithdevens.com/software/phpxml</a>
- #
- # This code is Open Source, released under terms similar to the Artistic License.
- # Read the license at <a href="http://keithdevens.com/software/license" target="_blank">http://keithdevens.com/software/license</a>
- #
- ###################################################################################
- ###################################################################################
- # XML_unserialize: takes raw XML as a parameter (a string)
- # and returns an equivalent PHP data structure
- ###################################################################################
- function & XML_unserialize(&$xml){
- $xml_parser = &new XML();
- $data = &$xml_parser->parse($xml);
- $xml_parser->destruct();
- return $data;
- }
- ###################################################################################
- # XML_serialize: serializes any PHP data structure into XML
- # Takes one parameter: the data to serialize. Must be an array.
- ###################################################################################
- function & XML_serialize(&$data, $level = 0, $prior_key = NULL){
- if($level == 0){ ob_start(); echo '<?xml version="1.0" ?>',"\n"; }
- while(list($key, $value) = each($data))
- if(!strpos($key, ' attr')) #if it's not an attribute
- #we don't treat attributes by themselves, so for an empty element
- # that has attributes you still need to set the element to NULL
- if(is_array($value) and array_key_exists(0, $value)){
- XML_serialize($value, $level, $key);
- }else{
- $tag = $prior_key ? $prior_key : $key;
- echo str_repeat("\t", $level),'<',$tag;
- if(array_key_exists("$key attr", $data)){ #if there's an attribute for this element
- while(list($attr_name, $attr_value) = each($data["$key attr"]))
- echo ' ',$attr_name,'="',htmlspecialchars($attr_value),'"';
- reset($data["$key attr"]);
- }
- if(is_null($value)) echo " />\n";
- elseif(!is_array($value)) echo '>',htmlspecialchars($value),"</$tag>\n";
- else echo ">\n",XML_serialize($value, $level+1),str_repeat("\t", $level),"</$tag>\n";
- }
- reset($data);
- if($level == 0){ $str = &ob_get_contents(); ob_end_clean(); return $str; }
- }
- ###################################################################################
- # XML class: utility class to be used with PHP's XML handling functions
- ###################################################################################
- class XML{
- var $parser; #a reference to the XML parser
- var $document; #the entire XML structure built up so far
- var $parent; #a pointer to the current parent - the parent will be an array
- var $stack; #a stack of the most recent parent at each nesting level
- var $last_opened_tag; #keeps track of the last tag opened.
- function XML(){
- $this->parser = &xml_parser_create();
- xml_parser_set_option(&$this->parser, XML_OPTION_CASE_FOLDING, false);
- xml_set_object(&$this->parser, &$this);
- xml_set_element_handler(&$this->parser, 'open','close');
- xml_set_character_data_handler(&$this->parser, 'data');
- }
- function destruct(){ xml_parser_free(&$this->parser); }
- function & parse(&$data){
- $this->document = array();
- $this->stack = array();
- $this->parent = &$this->document;
- return xml_parse(&$this->parser, &$data, true) ? $this->document : NULL;
- }
- function open(&$parser, $tag, $attributes){
- $this->data = ''; #stores temporary cdata
- $this->last_opened_tag = $tag;
- if(is_array($this->parent) and array_key_exists($tag,$this->parent)){ #if you've seen this tag before
- if(is_array($this->parent[$tag]) and array_key_exists(0,$this->parent[$tag])){ #if the keys are numeric
- #this is the third or later instance of $tag we've come across
- $key = count_numeric_items($this->parent[$tag]);
- }else{
- #this is the second instance of $tag that we've seen. shift around
- if(array_key_exists("$tag attr",$this->parent)){
- $arr = array('0 attr'=>&$this->parent["$tag attr"], &$this->parent[$tag]);
- unset($this->parent["$tag attr"]);
- }else{
- $arr = array(&$this->parent[$tag]);
- }
- $this->parent[$tag] = &$arr;
- $key = 1;
- }
- $this->parent = &$this->parent[$tag];
- }else{
- $key = $tag;
- }
- if($attributes) $this->parent["$key attr"] = $attributes;
- $this->parent = &$this->parent[$key];
- $this->stack[] = &$this->parent;
- }
- function data(&$parser, $data){
- if($this->last_opened_tag != NULL) #you don't need to store whitespace in between tags
- $this->data .= $data;
- }
- function close(&$parser, $tag){
- if($this->last_opened_tag == $tag){
- $this->parent = $this->data;
- $this->last_opened_tag = NULL;
- }
- array_pop($this->stack);
- if($this->stack) $this->parent = &$this->stack[count($this->stack)-1];
- }
- }
- function count_numeric_items(&$array){
- return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0;
- }
- ?>