直接贴代码吧！主要有两个文件，一个查询、修改单词的表单所处的页面。然后另外一个文件用于将单词保存到XML文件中，使用的类是DOMDocument类。这个类就是用于操作XML文件的。
<head>
<title>test for xml file</title>
<script type="text/javascript">
<!--
function cssShow(){
var b=document.getElementById("sele");
if(b.value==2){
document.getElementById("desc").style.display="none";
document.getElementById("note").style.display="none";
}
else {
document.getElementById("desc").style.display="inline-block";
document.getElementById("note").style.display="inline-block";
}
}
-->
</script>
</head>
<form action="./test.PHP" method="post">
word:<input type="text" size=20 name="word"/><br/>
<span id="desc">descri:<input type="text" size=20 name="descri"/></span><br/>
<span id="note">note:<input type="text" size=20 name="note"/></span><br/>
<select id="sele" name="select" onchange="javascript:cssShow();">
<option value="1" selected="selected">insert</option>
<option value="2">query</option>
</select><br/>
<input type="submit" value="submit"/>
</form>
<?PHP
header("content-type:text/html;charset=utf-8");
require_once 'xml.class.PHP';
if(isset($_POST['select'])){
$word=$descri=$note="";
$dom = new XMLOper();
if(isset($_POST['word'])){
$word=$_POST['word'];
$word=strtoupper($word);
}
if(isset($_POST['descri'])){
$descri=$_POST['descri'];
}
if(isset($_POST['note'])){
$note=$_POST['note'];
}
$arr=array($descri,$word,$note);
switch($_POST['select']){
case 1:if(!$dom->checkWord($word)){$dom->xml_insert($arr);$dom->save();echo "successful";}
else {echo "danci has exist yet!";}exit;
case 2:if(!$dom->checkWord($word)) die("no word in the dbtable");
$arr=$dom->xml_query($word);
if($arr[0]==""){
die("no word in xml");
}
echo "result:<br/>word:$arr[0]<br/>descri:$arr[1]<br/>note:$arr[2]";
}
}
?>
xml.class.PHP文件如下：
<?PHP class XMLOper { private $dom; private $root; public function __construct(){ $this->dom =new DOMDocument("1.0","utf-8"); $this->dom->formatOutput=true; } public function xml_query($word){ $bool=$this->dom->load("test.xml"); if(!$bool)echo "error when load the xml file<br/>"; $arr=array(); $temp=$this->dom->getElementById($word); $arr[0]=$temp->getElementsByTagName("NAME")->item(0)->nodeValue; $arr[1]=$temp->getElementsByTagName("DESCRI")->item(0)->nodeValue; $arr[2]=$temp->getElementsByTagName("NOTES")->item(0)->nodeValue; return $arr; } public function setTextNode($Node,$content){ $Node->appendChild($this->dom->createTextNode($content)); } public function xml_insert($contentArray){ $arr=array("WORD","DESCRI","NAME","NOTES"); $this->setRootEle("DANCI"); for($j=0;$j<4;$j++){ $tempArr[$j]=$this->dom->createElement($arr[$j]); } $word=$this->root->appendChild($tempArr[0]); for($j=1;$j<4;$j++){ $this->setTextNode($word->appendChild($tempArr[$j]),$contentArray[$j-1]); } $word->setAttribute("id",$contentArray[1]); } public function setRootEle($name){ $this->root=$this->dom->appendChild($this->dom->createElement($name)); } public function checkWord($word){ $str=file_get_contents("test.xml"); if(preg_match("/<NAME>".$word."<\/NAME>/",$str)==1)return true; else return false; } public function save(){ $this->dom->save("temp.xml"); $fp=fopen("temp.xml","r+");//不能用w+，要不然文件就会被覆盖,这种方式会覆盖之前写过的信息,而不是插入。 /*下面的一句话就可以让保存的文件的编码设为UTF-8，而文件默认编码方式为ANSI。这一点可以用记事本程序查看文件的编码方式 fwrite($fp,"\xef\xbb\xbf");*/ fwrite($fp,"<?xml ?>"); fgets($fp,200);//第一行字节留有200足够,使文件指针转移到下一行 //fgets($fp,200); $xml=""; while(!feof($fp)){ $xml.=fread($fp,1024); } $xml.="</TABLE>"; fclose($fp); $str=file_get_contents("test.xml"); $pattern="/<\/TABLE>/";$replacement=""; $str=preg_replace($pattern,$replacement,$str); file_put_contents("test.xml",$str); $fp=fopen("test.xml","a+"); fwrite($fp,$xml); fclose($fp); } } ?>原文链接：https://www.f2er.com/xml/299648.html
