新手上路請多關照 PHP新手上路（九）

建设一个简单交互的网站(五)
8. 投票系统
　　在许多时候，我们需要收集上网者和网友们的意见。例如：新版页面与旧版页面的比较；对某一事情的看法；对体育比赛结果的预测等等。这时候，你需要一个非常有效的网上调查系统。使用PHP就可以非常方便地实现你的这一构想。
8.1 投票系统（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
}
?>

与旧版页面相比较您觉得新版页面：

if(!isset($submit)){
?>

資訊量更大


網頁更精美


沒什麼改進


其它



查看調查結果

/*
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="";
$poll_rowHeader="";
$poll_rowHeader="";
$poll_dataHeader="";
$poll_rowFooter="";
$poll_tableFooter= "

";
$poll_dataFooter="

";
$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;$i$curArray[$i]=0;
}
}
if(isset($poll)){
$curArray[$poll_voteNr]++;
$poll_sum++;
}
echo $poll_tableHeader;
// cycle through all option;編歷陣列
reset($curArray);
while (list($K, $V) = each($curArray))
{
$poll_optionText = $descArray[$K];
$poll_optionCount = $V;
echo $poll_rowHeader;
if($poll_optionText != "")
{
echo $poll_dataHeader; poll_dataFooter;
if($poll_sum)
$poll_percent = 100 * $poll_optionCount / $poll_sum;
else
$poll_percent = 0； > 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: $poll_sum";
echo $poll_tableFooter;
echo "
";
echo "";
echo " ";
if(isset($ 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);
}
}
?>