PHP新手上路（九）

最後更新：2018-12-08 來源：互聯網

上載者：User

創建阿里雲帳戶，並獲得超過 40 款產品的免費試用版；而企業帳戶則可以享有總值 $1200 的免費試用版。立即註冊！

建設一個簡單互動的網站(五)

8. 投票系統

　　在許多時候，我們需要收集上網者和網友們的意見。例如：新版頁面與舊版頁面的比較；對某一事情的看法；對體育比賽結果的預測等等。這時候，你需要一個非常有效網上調查系統。使用PHP就可以非常方便地實現你的這一構想。

8.1 投票系統（mypolls.php3）：

<?
$status=0;
if(isset($polled)&&($polled=="c-e")){
$status=1;
}
#echo "$status";
if(isset($poll)&&($status==0)){
setcookie("polled","c-e",time()+86400,"/");#time=24h
}
?>
<html>
<head>
<title>新版頁面調查</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">

</style>
</head>
<body bgcolor="#FFFFFF">
<div class="head">與舊版頁面相比較您覺得新版頁面：</div><br>
<?
if(!isset($submit)){
?>
<form action="myPolls.php3" method="get">
<input type="radio" name="poll_voteNr" value="1" checked >
<span class="pt9">資訊量更大</span> <br>
<input type="radio" name="poll_voteNr" value="2" >
<span class="pt9">網頁更精美</span> <br>
<input type="radio" name="poll_voteNr" value="3" >
<span class="pt9">沒什麼改進</span> <br>
<input type="radio" name="poll_voteNr" value="4" >
<span class="pt9">其它</span> <br>
<input type="submit" name="submit" value="OK">
<input type="hidden" name="poll" value="vote">
<A HREF="myPolls.php3?submit=OK" class="p9">查看調查結果</A>
</form>
<?
/*
如果想增加其它的選項可直接加上即可
*/
}else{
$descArray=array(1=>"資訊量更大",
2=>"網頁更精美",
3=>"沒什麼改進",
4=>"其它"
);
$poll_resultBarHeight = 9; // height in pixels of percentage bar in result table
$poll_resultBarScale = 1; // scale of result bar (in multiples of 100 pixels)
$poll_tableHeader="<table border=1 class="tb">";
$poll_rowHeader="<tr>";
$poll_dataHeader="<td align=center>";
$poll_dataFooter="</td>";
$poll_rowFooter="</tr>";
$poll_tableFooter="</table>";
$coutfile="data.pol";
$poll_sum=0;

// read counter-file
if (file_exists( $coutfile))
{
$fp = fopen( $coutfile, "rt");
while ($Line = fgets($fp, 10))
{
// split lines into identifier/counter
if (ereg( "([^ ]*) *([0-9]*)", $Line, $tmp))
{
$curArray[(int)$tmp[1]] = (int)$tmp[2];
$poll_sum+=(int)$tmp[2];
}
}
// close file
fclose($fp);
}else{//
for ($i=1;$i<=count($descArray);$i++){
$curArray[$i]=0;
}
}
if(isset($poll)){
$curArray[$poll_voteNr]++;
$poll_sum++;
}
echo $poll_tableHeader;

// cycle through all options編曆數組
reset($curArray);
while (list($K, $V) = each($curArray))
{
$poll_optionText = $descArray[$K];
$poll_optionCount = $V;
echo $poll_rowHeader;

if($poll_optionText != "")
{
echo $poll_dataHeader;
echo $poll_optionText;
echo $poll_dataFooter;

if($poll_sum)
$poll_percent = 100 * $poll_optionCount / $poll_sum;
else
$poll_percent = 0;
echo $poll_dataHeader;

if ($poll_percent > 0)
{
$poll_percentScale = (int)($poll_percent * $poll_resultBarScale);
}

printf(" %.2f %% (%d)", $poll_percent, $poll_optionCount);

echo $poll_dataFooter;
}

echo $poll_rowFooter;
}

echo "總共投票次數:<font color=red> $poll_sum</font>";
echo $poll_tableFooter;
echo "<br>";
echo "<input type="submit" name="Submit1" value="返回首頁" onClick="javascript:location='http://gophp.heha.net/index.html'">";
echo " <input type="submit" name="Submit2" value="重新投票" onClick="javascript:location='http://gophp.heha.net/mypolls.php3'">";
if(isset($poll)){
// write counter file
$fp = fopen($coutfile, "wt");
reset($curArray);
while (list($Key, $Value) = each($curArray))
{
$tmp = sprintf( "%s %dn", $Key, $Value);
fwrite($fp, $tmp);
}
// close file
fclose($fp);
}
}
?>
</body>
</html>

注釋：從上面我們可以看出該投票系統的基本過程：
1、開啟檔案取得資料到數組$curArray（檔案不存在則初始化數組$curArray）
2、編曆數組，處理資料得到所需值
3、計算百分比，控制統計bar映像寬度
4、將資料儲存到"data.pol"中

　　這裡有一點是需要注意：這裡的data.pol文字檔需要有寫入權限。

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More