分类分类
关注+2010-02-04作者:
1.注意几个编码地方
1.1表单所在的网页的:meta
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1.2XMLHTTPRequest GET的编码
httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
此处设置不对!responseText会返回empty(没有内容),如果您有FireFox并装有FireBug组件的话,点击状态栏的绿色箭头打开控件面板(非OS的,FireBug的),选中Console会看到Response选项是:
Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,COERCIBLE) for operation ’=
当然如果是连接数据库的话也可能跟下面的(1.4)有关系.
1.3ajax GET请求的页面(.php)header
header("Content-Type:text/html;charset=UTF-8");
1.4数据连接的编码
mysql_query("SET CHARACTER SET UTF8");
如果你的数据库是GBK的或其它的字符集,为了统一编码还要与以上三个统一起来.下面我的示例用的数据库也是GBK,从昨天开始我一起把它设成:
mysql_query("SET CHARACTER SET GBK");
可还是有时发现会返回空(empty 我用的是ResponseText),千万不要写成UTF-8噢,数据库的字符集是没有中间的"-"
2.如果还是返回空或无效的值
例如:
a.html中有表单,a用XMLHTTPRequest和b.php通讯.
首先要保证b.php可以正确运行,例b.php?param=value打印出来的是你期望的值
如果a.html打印b.php返回的结果(ajax)与上面的(单独运行b.php)执行结果有出入.可以删除b.php中的空行试试!我想应该不会出现这种情况,但我有几次作demo删除后和删除前确实有出入
3.下面是朋友发给我的一个示例!我修改完的源码
表单页:3.1JS部分
function processRequest() {
var tran;
if (httpRequest.readyState == 4 || httpRequest.readyState == "complete") {
if (httpRequest.status == 200 || httpRequest.statusText == "OK") {
tran = httpRequest.responseText;
//setGlobalValue(tran);
alert(tran);
} else {
alert("您所请求的页面发生错误!");
}
}
}
function sendRequest(strurl) {
httpRequest = false;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
httpRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE
try {
httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!httpRequest) {
window.alert("通讯失败");
return false;
}
httpRequest.onreadystatechange = processRequest;
httpRequest.open("GET", strurl, true);
httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
httpRequest.send(null);
}>}
function processRequest() {
var tran;
if (httpRequest.readyState == 4 || httpRequest.readyState == "complete") {
if (httpRequest.status == 200 || httpRequest.statusText == "OK") {
tran = httpRequest.responseText;
//setGlobalValue(tran);
alert(tran);
} else {
alert("您所请求的页面发生错误!");
}
}
}
function sendRequest(strurl) {
httpRequest = false;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
httpRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE
try {
httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!httpRequest) {
window.alert("通讯失败");
return false;
}
httpRequest.onreadystatechange = processRequest;
httpRequest.open("GET", strurl, true);
httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
httpRequest.send(null);
}>}
function asychronouscheck(strparam){
if(strparam.value.length == 0){
document.getElementById("state3").innerHTML="新帐号不能为空";
}
var strurl="checknewaccount.php?name="+encodeURIComponent(strparam.value);
sendRequest(strurl);
<BR pre="">
function asychronouscheck(strparam){
if(strparam.value.length == 0){
document.getElementById("state3").innerHTML="新帐号不能为空";
}
var strurl="checknewaccount.php?name="+encodeURIComponent(strparam.value);
sendRequest(strurl);
表单部分
<dl>
<dt>新帐号</dt>
<dd><label id="state3"></label></dd>
<dd><input type="text" name="nusername" id="nusername" size="26" maxlength="14" onblur="asychronouscheck(this)" /></dd>
</dl>
<dl>
<dt>新帐号</dt>
<dd><label id="state3"></label></dd>
<dd><input type="text" name="nusername" id="nusername" size="26" maxlength="14" onblur="asychronouscheck(this)" /></dd>
</dl>
php文件
<?php
header("Content-Type:text/html;charset=UTF-8");
conn=mysql_connect(’localhost’,’root’,’bus’);
mysql_select_db(’test’,conn);
mysql_query("SET CHARACTER SET UTF8");
curName=GET[’name’];
if(emptyempty(curName)){
echo "新帐号不能为空";
exit();
}
tSQL="SELECT uid FROM members WHERE username =’curName’";
try{
result=mysql_query(tSQL) OR die(mysql_error());
row = mysql_num_rows(result);
flush();
if(row>0){
echo "false";
}else{
echo "true";
}
mysql_free_result(result);
mysql_close(conn);
}catch(Exception e){
print e->getMessage();
}
?>
相关文章
更多+相同厂商
热门推荐
点击查看更多
点击查看更多
点击查看更多
说两句网友评论