单选按钮交替PHP表单字段功能与AJAX字段、表单、单选、按钮
有无单选按钮来触发不同的PHP函数..此刻虽然，页面只是闪烁点击提交按钮时！
Have Radio Buttons to Trigger Different PHP Functions.. At the moment though, the page just flashes when the submit button is clicked!
看来.PHP NEEDS调整!!
IT SEEMS THE .PHP NEEDS TWEAKING!!
想不需要刷新页面来执行的功能，因此AJAX ..
Would like the functions to perform without a page refresh, hence AJAX..
表单域应提交的字符串到PHP当提交按钮（返回）被点击时，受选择的单选按钮。
The Form field should submit a string to the PHP when the Submit Button (Return) is clicked, subject to the selected Radio button.
http://bootply.com/61461
HTML页：
<div class="container">
<!-- Input Section -->
<form action="">
<fieldset>
<legend>A Form to input plain English and output Pig Latin</legend>
<label></label>
<input class="span9" type="text" id="txt1" name="yourText" placeholder="… Type Something Here …"><br><br>
<span class="help-block">Choose whether or not you want to have the English input echoed on the output as Pig Latin:</span>
<label class="radio inline">
<input type="radio" name="optionsRadios" id="english" value="english" checked>
Echo the English Input
</label>
<label class="radio inline">
<input type="radio" name="optionsRadios" id="piglatin" value="piglatin">
Output as Pig Latin
</label>
<br><br>
<button type="submit" class="btn" onClick="showTxt(this.value)">Return</button>
</fieldset>
</form>
<br><br><br>
<!-- Output Section -->
<span id="return-text">
<p>Text Will Post Here</p>
</span>
</div>
PHP页面：
PHP PAGE:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Pig Latin PHP</title>
</head>
<body>
<?php
if( isset($_POST['yourText'])){
$text = $_POST['yourText'];
}
function engish(){
if( isset($_POST['optionsRadios']) &&
$_POST['optionsRadios'] == 'english'){
echo $text;
}
}
function piglatin(){
if( isset($_POST['optionsRadios']) &&
$_POST['optionsRadios'] == 'piglatin'){
echo '…pig latin php operation to be written…';
}
}
echo english();
echo piglatin();
?>
</body>
</html>
AJAX脚本（感谢OGC-尼克的回答）：
AJAX SCRIPT (thanks to ogc-nick's answer):
<!-- AJAX Call to piglatin.php -->
<script>
function showTxt(str)
{
var xmlhttp;
if (str.length==0)
{
document.getElementById("return-text").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("return-text").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("POST","piglatinajax.php", true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
var dataString = $('form').serialize();
xmlhttp.send(dataString);
}
感谢您寻找
推荐答案
它看起来像你的请求被发送数据的$ _ GET变量①但你的PHP正在寻找用于索引。您需要添加后的数据发送方法，像这样
It looks like your request is sending the data in the $_GET variable q but you php is looking for the indexes. You need to add post data in the send method like so
var optionsRadios = document.forms[formname].optionsRadios.value;
var yourText = document.forms[formname].yourText.value;
xmlhttp.send("optionsRadios=" + optionsRadios + "&yourText=" + yourText);
参考： http://www.w3schools.com/ajax/ajax_xmlhttprequest_send.asp
