1. 程式人生 > >PHP-AJAX 投票

PHP-AJAX 投票

上程式碼…
兩個檔案:poll.html poll_vote.php
poll.html:

<html>
<head>
<meta charset="utf-8">
<title>ajax投票</title>
<script>
function getVote(int) {
  if (window.XMLHttpRequest) {
    // IE7+, Firefox, Chrome, Opera, Safari 執行程式碼
    xmlhttp=new XMLHttpRequest();
  } else
{ // IE6, IE5 執行程式碼 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("poll").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","poll_vote.php?vote="
+int,true); xmlhttp.send(); } </script> </head> <body> <div id="poll"> <h3>你喜歡 PHPAJAX?</h3> <form>: <input type="radio" name="vote" value="0" onclick="getVote(this.value)"> <br>: <input type="radio" name="vote" value="1" onclick="getVote(this.value)"
> </form> </div> </body> </html>

poll_vote.php:

<?php
$vote = htmlspecialchars($_REQUEST['vote']);   //把預定義的字元轉換為 HTML 實體

// 獲取檔案中儲存的資料
$filename = "poll_result.txt";
$content = file($filename);

// 將資料分割到陣列中
$array = explode("||", $content[0]);
$yes = $array[0];
$no = $array[1];

if ($vote == 0)
{
 $yes = $yes + 1;
}

if ($vote == 1)
{
 $no = $no + 1;
}

// 插入投票資料
$insertvote = $yes."||".$no;
$fp = fopen($filename,"w");
fputs($fp,$insertvote);
fclose($fp);
?>

<h2>結果:</h2>
<table>
 <tr>
 <td>:</td>
 <td>
 <span style="display: inline-block; background-color:green;
     width:<?php echo(100*round($yes/($no+$yes),2)); ?>px;
     height:20px;" ></span>
 <?php echo(100*round($yes/($no+$yes),2)); ?>%
 </td>
 </tr>
 <tr>
 <td>:</td>
 <td>
 <span style="display: inline-block; background-color:red;
     width:<?php echo(100*round($no/($no+$yes),2)); ?>px;
     height:20px;"></span>
 <?php echo(100*round($no/($no+$yes),2)); ?>%
 </td>
 </tr>
</table>