PHP ???? ?? AJAX ??? ?? ??
AJAX? ????? ?? ???? ??? ?? ??? ??? ? ????
?? ???? ??? ??? ???? ???? ???? ???? ?? ?? ??? ????.
?? ??? ?? ??? ???? ?? ??? ????.
???? ???? ???? ??? ?????
?? ???? ???? ???? ??? ?????. ??
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?? head.xml? ???? ??? ??? ????. ??? ??
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<script>
function showResult(str){
if (str.length==0){
document.getElementById("livesearch").innerHTML="";
document.getElementById("livesearch").style.border="0px";
return;
}
if (window.XMLHttpRequest){
// IE7+, Firefox, Chrome, Opera, Safari 瀏覽器執(zhí)行
xmlhttp=new XMLHttpRequest();
}else{
// IE6, IE5 瀏覽器執(zhí)行
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
document.getElementById("livesearch").innerHTML=xmlhttp.responseText;
document.getElementById("livesearch").style.border="1px solid #A5ACB2";
}
}
xmlhttp.open("GET","demo.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
<input type="text" size="30" onkeyup="showResult(this.value)">
<div id="livesearch"></div>
</form>
</body>
</html>???? PHP ??? ???? ??? ??? ????.
<?php
$xmlDoc=new DOMDocument();
$xmlDoc->load("links.xml");
$x=$xmlDoc->getElementsByTagName('link');
// 從 URL 中獲取參數(shù) q 的值
$q=$_GET["q"];
// 如果 q 參數(shù)存在則從 xml 文件中查找數(shù)據(jù)
if (strlen($q)>0){
$hint="";
for($i=0; $i<($x->length); $i++){
$y=$x->item($i)->getElementsByTagName('title');
$z=$x->item($i)->getElementsByTagName('url');
if ($y->item(0)->nodeType==1){
// 找到匹配搜索的鏈接
if (stristr($y->item(0)->childNodes->item(0)->nodeValue,$q)){
if ($hint==""){
$hint="<a href='" .
$z->item(0)->childNodes->item(0)->nodeValue .
"' target='_blank'>" .
$y->item(0)->childNodes->item(0)->nodeValue . "</a>";
}else{
$hint=$hint . "<br /><a href='" .
$z->item(0)->childNodes->item(0)->nodeValue .
"' target='_blank'>" .
$y->item(0)->childNodes->item(0)->nodeValue . "</a>";
}
}
}
}
}
// 如果沒(méi)找到則返回 "no suggestion"
if ($hint==""){
$response="no suggestion";
}else{
$response=$hint;
}
// 輸出結(jié)果
echo $response;
?>??:
?? ??? ?? ?? ??(str.length==0 ), ? ??? ??? ?? ?? ???? ??? ??? ??? ?????.
?? ??? ?? ?? ??? showResult()? ?? ??? ?????.
XMLHttpRequest ?? ??
?? ?? ? ??? ?? ?? ???
??? ?? ??? ?? ???
URL ?? ??? ????(q)(?? ??? ?? ??)? ?????
links.xml? ?? ??? ?? ??? ??? ???. ?? ?????? ??? ??? ????.
<?xml version="1.0" encoding="UTF-8"?> <pages> <link> <title>HTML a 標(biāo)簽</title> <url>http://ipnx.cn/tags/tag-a.html</url> </link> <link> <title>HTML br 標(biāo)簽</title> <url>http://ipnx.cn/tags/tag-br.html</url> </link> <link> <title>CSS background 屬性</title> <url>http://ipnx.cn/cssref/css3-pr-background.html</url> </link> <link> <title>CSS border 屬性</title> <url>http://ipnx.cn/cssref/pr-border.html</url> </link> <link> <title>JavaScript Date 對(duì)象</title> <url>http://ipnx.cn/jsref/jsref-obj-date.html</url> </link> <link> <title>JavaScript Array 對(duì)象</title> <url>http://ipnx.cn/jsref/jsref-obj-array.html</url> </link> </pages>
