发一个好用的php读取xml的类
<?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;
}
?>
以下是一个应用实例，XML来源地址是：http://data.cnaz.com/spread/?tid=7&sid=42845&order=date&flags=desc&num=50&page=1&hosts=pic.ttiankan.com&code=xml
<?php
include('xml.php'); //引用PHP XML操作类
$page=$_GET['page'];
if(empty($page) || !is_numeric($page)) $page=1;
//偶像明星
$xml = file_get_contents('http://data.cnaz.com/spread/?tid=7&sid=42845&order=date&flags=desc&num=50&page='.$page.'&hosts=pic.ttiankan.com&code=xml');
//$xml = file_get_contents("php://input"); //读取POST过来的输入流
$data=XML_unserialize($xml);
$item=$data['rss']['channel'];
$link = $item['link'];
$description= $item['description'];
$keywords = $item['keywords'];
$totalnum = $item['totalnum'];
$usetime = $item['usetime'];
$totalpage=ceil($totalnum/50);
echo('<div style="600px;margin:5px auto;background:#eee;border:1px #ccc solid;padding:5px;">关键字:'.$keywords.' ');
echo('总记录数:'.$totalnum.', 每页显示50条,一共有'.$totalpage.'页, 当前是第'.$page.'页</div>');
$item=$item['item'];
echo('
<style>
*{font-size:12px;color:#000;font-family:arial;}
a{text-decoration:none;}
a:hover{text-decoration:underline;}
.tbl{border-top:1px #ccc solid;border-left:1px #ccc solid;}
.tbl td{padding:4px 5px;border-bottom:1px #ccc solid;border-right:1px #ccc solid;}
</style>
');
echo('
<table cellspacing="0" cellpadding="0" border="0" class="tbl" width="600">
<tr>
<td>分类</td>
<td>标题</td>
<td>链接</td>
</tr>
');
foreach($item as $list)
{
echo('<tr>');
echo('<td>'.$list['sort'].'</td>');
echo('<td><a title="'.$list['description'].'" href="'.$list['photo'].'" target="_blank">'.$list['title'].'</a></td>');
echo('<td><a href="'.$list['link'].'" target="_blank">'.$list['link'].'</a></td>');
echo('</tr>');
}
echo('<tr>
<td colspan="3">
');
if($page>1) echo('<a href="b.php?page='.($page-1).'">上一页</a> ');
if($page<$totalpage) echo('<a href="b.php?page='.($page+1).'">下一页</a>');
echo('</td></tr>');
echo('</table>');
?>