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復(fù)制代碼 代碼如下:
function processajax (serverPage, obj, getOrPost, str){
//將創(chuàng)建XMLHttpRequest對(duì)象寫到getxmlhttp()函數(shù)中，并獲取該對(duì)象
xmlhttp = getxmlhttp ();
//GET方式（和前面幾篇一樣）
if (getOrPost == "get"){
xmlhttp.open("GET", serverPage);
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}
//POST方式
else{
//第三個(gè)true參數(shù)將打開異步功能
xmlhttp.open("POST", serverPage, true);
//創(chuàng)建POST請(qǐng)求
xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=GB2312");
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
//表單（Form）傳值
xmlhttp.send(str);
}
}
在下圖中當(dāng)點(diǎn)擊“Submit”按鈕后會(huì)激發(fā)submitform函數(shù)（functions.js），在該函數(shù)中會(huì)通過getformvalues函數(shù)檢查Form內(nèi)容是否都填寫完畢，否則提示哪項(xiàng)未填寫。當(dāng)檢查通過后會(huì)調(diào)用process_task.php程序，它會(huì)將Form值寫入數(shù)據(jù)庫(kù)。
submitform 函數(shù)：
復(fù)制代碼 代碼如下:
function submitform (theform, serverPage, objID, valfunc){
var file = serverPage;
//檢查Form值
var str = getformvalues(theform,valfunc);
//Form全部填寫
if (aok == true){
obj = document.getElementById(objID);
//運(yùn)行Ajax進(jìn)行傳值
processajax(serverPage, obj, "post", str);
}
}
getformvalues 函數(shù)：
復(fù)制代碼 代碼如下:
function getformvalues (fobj, valfunc){
var str = "";
aok = true;
var val;
//遍歷Form中所有對(duì)象
for(var i = 0; i < fobj.elements.length; i++){
if(valfunc){
if (aok == true){
val = valfunc (fobj.elements[i].value,fobj.elements[i].name);
if (val == false){
aok = false;
}
}
}
str += fobj.elements[i].name + "=" + escape(fobj.elements[i].value) + "&";
}
//將Form值以String形式返回
return str;
}
process_task.php 程序：
復(fù)制代碼 代碼如下:
<?php
require_once ("dbconnector.php");
opendatabase();
//對(duì)數(shù)據(jù)預(yù)處理
$yourname = strip_tags (mysql_real_escape_string ($_POST['yourname']));
$yourtask = strip_tags (mysql_real_escape_string ($_POST['yourtask']));
$thedate = strip_tags (mysql_real_escape_string ($_POST['thedate']));
//創(chuàng)建Insert語(yǔ)句
$myquery = "INSERT INTO task (name, thedate, description) VALUES ('$yourname','$thedate','$yourtask')";
//執(zhí)行SQL語(yǔ)句
if (!mysql_query ($myquery)){
header ("Location: theform.php?message=There was a problem with the entry.");
exit;
}
//返回成功信息
header ("Location: theform.php?message=Success");
?>
源代碼下載
php技術(shù)：Ajax+PHP 邊學(xué)邊練之四 表單，轉(zhuǎn)載需保留來(lái)源！
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