一、用法舉例:
1、将xml檔案解釋成便于使用的數組:
<?php
include('xml.php'); //引用php xml操作類
$xml = file_get_contents('data.xml'); //讀取xml檔案
//$xml = file_get_contents("php://input"); //讀取post過來的輸入流
$data=xml_unserialize($xml);
echo '<pre>';
print_r($data);
echo '</pre>';
?>
data.xml檔案:
<?xml version="1.0" encoding="gbk"?>
<video>
<upload>
<videoid>998</videoid>
<name><![cdata[回憶未來]]></name>
<memo><![cdata[def]]></memo>
<up_userid>11317</up_userid>
</upload>
</video>
利用該xml操作類生成的對應數組(漢字編碼:utf-8):
array
(
[video] => array
(
[upload] => array
(
[videoid] => 998
[name] => 回憶未來
[memo] => def
[up_userid] => 11317
)
)
)
2、将數組轉換成xml檔案:
include('xml.php');//引用php xml操作類
$xml = xml_serialize($data);
二、php xml操作類源代碼:
<?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]);
#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;
?>