PHP+AJAX自动完成实例：关于邮编的处理

当客户输入一个postcode后，zipcode.php就接收到它，然后进行从数据表中取出对应的资料，再按一定的格式返回给客户端（此处是以 | 分隔）。最后客户端接收返回的资料，显示在页面上。

<script> <br />function createRequestObject() { <br />var ro; <br />var browser = navigator.appName; <br />if(browser == "Microsoft Internet Explorer"){ <br />ro = new ActiveXObject("Microsoft.XMLHTTP"); <br />}else{ <br />ro = new XMLHttpRequest(); <br />} <br />return ro; <br />} <br />var http = createRequestObject(); <br />function sndReq(zip) { <br />http.open('get', 'zipcode.PHP?zip='+zip); <br />http.onreadystatechange = handleResponse; <br />http.send(null); <br />} <br />function handleResponse() { <br />if(http.readyState == 4){ <br />var response = http.responseText; <br />var update = new Array(); <br />if(response.indexOf('|' != -1)) { <br />update = response.split('|'); <br />document.getElementById("city").value = update[0]; <br />document.getElementById("state").value = update[1]; <br />} <br />} <br />} <br /></script>

Enter A United States Zipcode, Then Tab

以上是客户输入页面，下面是服务端的处理页面'zipcode.PHP

$dbuser = 'root';
$dbpass = '111111';
$cn = mysql_connect("localhost", $dbuser, $dbpass);
$db = mysql_select_db("ajax");
$sql = "select city, state from zipcodes where zipcode = " . $_REQUEST['zip'];
$rs = mysql_query($sql);
$row = mysql_fetch_array($rs);
echo $row['city'] . "|" . $row['state'];
mysql_close($cn);
?>

当客户输入一个postcode后，zipcode.php就接收到它，然后进行从数据表中取出对应的资料，再按一定的格式返回给客户端（此处是以 | 分隔）。最后客户端接收返回的资料，显示在页面上。

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if(response.indexOf('|' != -1)) {
update = response.split('|');
document.getElementById("city").value = update[0];
document.getElementById("state").value = update[1];