发一个好用的php读取xml的类

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

$xml = file_get_contents('http://data.cnaz.com/spread/?t.$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 >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" 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>');

?>