php写的 xml操作类
XML作为轻量级的数据库还是挺好用的，当XML不超过2M大小的时候读取速度还是很快的。以下提供我自己写的XML操作类。如果用户想循环利用XML作为数据库的话，只要记录节点总数，当到达一个饱和数量时，又重新初始化XML即可。
<?php
class requirelog
{
protected static $requirelog;
//get ready for xml,if xml is not found ,create xml
static function _initializeLog()
{
if(file_exists('requirelog.xml'))
{
self::$requirelog = DOMDocument::load('requirelog.xml');
}
else
{
self::$requirelog = new DOMDocument('1.0', 'iso-8859-1');
self::$requirelog->loadXML('<?xml version="1.0" encoding="UTF-8"?><contents></contents>');
self::$requirelog->save('requirelog.xml');
}
}
//获取finish字段全部为0的所有节点
public static function get_entrys()
{
self::_initializeLog();
$entrys = self::$requirelog->getElementsByTagName('entry');
$entry_arrays = array();
foreach($entrys as $entry)
{
if($entry->getElementsByTagName('finish')->item(0)->nodeValue == 0)
{
$entry_array = array();
$entry_array['id'] = $entry->getElementsByTagName('id')->item(0)->nodeValue;
$entry_array['time'] = $entry->getElementsByTagName('time')->item(0)->nodeValue;
$entry_array['operator'] = $entry->getElementsByTagName('operator')->item(0)->nodeValue;
$entry_array['byoperator'] = $entry->getElementsByTagName('byoperator')->item(0)->nodeValue;
$entry_array['parameters1'] = $entry->getElementsByTagName('parameters1')->item(0)->nodeValue;
$entry_array['parameters2'] = $entry->getElementsByTagName('parameters2')->item(0)->nodeValue;
$entry_array['parameters3'] = $entry->getElementsByTagName('parameters3')->item(0)->nodeValue;
$entry_array['type'] = $entry->getElementsByTagName('type')->item(0)->nodeValue;
$entry_array['module'] = $entry->getElementsByTagName('module')->item(0)->nodeValue;
$entry_array['finish'] = $entry->getElementsByTagName('finish')->item(0)->nodeValue;
$entry_arrays[] = $entry_array;
}
}
return$entry_arrays;
}
//获取所有的节点
public static function get_count_entrys()
{
self::_initializeLog();
$entrys = self::$requirelog->getElementsByTagName('entry');
$entry_arrays = array();
foreach($entrys as $entry)
{
$entry_array = array();
$entry_array['id'] = $entry->getElementsByTagName('id')->item(0)->nodeValue;
$entry_array['time'] = $entry->getElementsByTagName('time')->item(0)->nodeValue;
$entry_array['operator'] = $entry->getElementsByTagName('operator')->item(0)->nodeValue;
$entry_array['byoperator'] = $entry->getElementsByTagName('byoperator')->item(0)->nodeValue;
$entry_array['parameters1'] = $entry->getElementsByTagName('parameters1')->item(0)->nodeValue;
$entry_array['parameters2'] = $entry->getElementsByTagName('parameters2')->item(0)->nodeValue;
$entry_array['parameters3'] = $entry->getElementsByTagName('parameters3')->item(0)->nodeValue;
$entry_array['type'] = $entry->getElementsByTagName('type')->item(0)->nodeValue;
$entry_array['module'] = $entry->getElementsByTagName('module')->item(0)->nodeValue;
$entry_array['finish'] = $entry->getElementsByTagName('finish')->item(0)->nodeValue;
$entry_arrays[] = $entry_array;
}
return$entry_arrays;
}
//根据ID获取节点
public static function get_entry($id)
{
self::_initializeLog();
$count=count(self::get_count_entrys());
if($count > 0)
{
$entrys = self::$requirelog->getElementsByTagName('entry');
foreach($entrys as $entry)
{
if ($id == $entry->getElementsByTagName('id')->item(0)->nodeValue)
{
$entry_array = array();
$entry_array['id'] = $entry->getElementsByTagName('id')->item(0)->nodeValue;
$entry_array['time'] = $entry->getElementsByTagName('time')->item(0)->nodeValue;
$entry_array['operator'] = $entry->getElementsByTagName('operator')->item(0)->nodeValue;
$entry_array['byoperator'] = $entry->getElementsByTagName('byoperator')->item(0)->nodeValue;
$entry_array['parameters1'] = $entry->getElementsByTagName('parameters1')->item(0)->nodeValue;
$entry_array['parameters2'] = $entry->getElementsByTagName('parameters2')->item(0)->nodeValue;
$entry_array['parameters3'] = $entry->getElementsByTagName('parameters3')->item(0)->nodeValue;
$entry_array['type'] = $entry->getElementsByTagName('type')->item(0)->nodeValue;
$entry_array['module'] = $entry->getElementsByTagName('module')->item(0)->nodeValue;
$entry_array['finish'] = $entry->getElementsByTagName('finish')->item(0)->nodeValue;
return $entry_array;
}
}
}
else
return null;
}
//执行完用户请求，更改finsh字段
public static function do_finsh($id)
{
self::_initializeLog();
$entrys = self::$requirelog->getElementsByTagName('entry');
$entry_arrays = array();
foreach($entrys as $entry)
{
if($entry->getElementsByTagName('id')->item(0)->nodeValue == $id)
{
$entry->getElementsByTagName('finish')->item(0)->nodeValue = 1;
}
}
self::$requirelog->save('requirelog.xml');
}
//增加新节点,$operator为操作者，$byoperator是被操作对象，$parameters1,2,3为可扩展的参数，$type为类型，$module为影响的模块
static function add_entry($operator,$byoperator,$parameters1,$parameters2,$parameters3,$type,$module)
{
//$contents = self::$restlog->getElementsByTagName('contents');
self::_initializeLog();
$count=count(self::get_count_entrys());
$entry = self::$requirelog->createElement('entry');
$id = self::$requirelog->createElement('id');
$idvalue = self::$requirelog->createTextNode($count+1);
$id->appendChild($idvalue);
$time = self::$requirelog->createElement('time');
$timevalue = self::$requirelog->createTextNode(date("Y-m-d H:i:s",time()));
$time->appendChild($timevalue);
$op = self::$requirelog->createElement('operator');
$opvalue = self::$requirelog->createTextNode($operator);
$op->appendChild($opvalue);
$bop = self::$requirelog->createElement('byoperator');
$bopvalue = self::$requirelog->createTextNode($byoperator);
$bop->appendChild($bopvalue);
$ps1 = self::$requirelog->createElement('parameters1');
$ps1value = self::$requirelog->createTextNode($parameters1);
$ps1->appendChild($ps1value);
$ps2 = self::$requirelog->createElement('parameters2');
$ps2value = self::$requirelog->createTextNode($parameters2);
$ps2->appendChild($ps2value);
$ps3 = self::$requirelog->createElement('parameters3');
$ps3value = self::$requirelog->createTextNode($parameters3);
$ps3->appendChild($ps3value);
$tp = self::$requirelog->createElement('type');
$tpvalue = self::$requirelog->createTextNode($type);
$tp->appendChild($tpvalue);
$md = self::$requirelog->createElement('module');
$mdvalue = self::$requirelog->createTextNode($module);
$md->appendChild($mdvalue);
$fi = self::$requirelog->createElement('finish');
$fivalue = self::$requirelog->createTextNode(0);
$fi->appendChild($fivalue);
$entry->appendChild($id);
$entry->appendChild($time);
$entry->appendChild($op);
$entry->appendChild($bop);
$entry->appendChild($ps1);
$entry->appendChild($ps2);
$entry->appendChild($ps3);
$entry->appendChild($tp);
$entry->appendChild($md);
$entry->appendChild($fi);
self::$requirelog->documentElement->appendChild($entry);
self::$requirelog->save('requirelog.xml');
return 1;
}
}
?>
requirelog.xml的格式如下：
<?xml version="1.0" encoding="UTF-8"?>
<contents>
<entry>
<id>1</id>
<time>2009-11-21 16:56:33</time>
<operator>peng.zhou</operator>
<byoperator>zxcxzcxzczxcxz</byoperator>
<parameters1>cxzcxzc</parameters1>
<parameters2/>
<parameters3/>
<type>add_group</type>
<module>cn_group</module>
<finish>1</finish>
</entry>
<entry>
<id>2</id>
<time>2009-11-21 16:56:53</time>
<operator>peng.zhou</operator>
<byoperator>sales</byoperator>
<parameters1/>
<parameters2/>
<parameters3/>
<type>add_member</type>
<module>mail_group</module>
<finish>1</finish>
</entry>
</contents>
页:
[1]