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數組<=>xml 互相轉換

一、用法舉例:

1、将xml檔案解釋成便于使用的數組:

數組<=>xml 互相轉換

<?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:

數組<=>xml 互相轉換

<?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):

數組<=>xml 互相轉換

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:

數組<=>xml 互相轉換

include('xml.php');//引用php xml操作類  

$xml = xml_serialize($data);  

 二、php xml操作類源代碼:

數組<=>xml 互相轉換

<?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;   

?>