PHP新手上路（九）投票系统

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。

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 } ?> <html> <head> <title>新版页面调查</title> <meta http-equiv= "Content-Type" content= "text/html; charset=gb2312" > <style type= "text/css" >  </style> </head> <body bgcolor= "#FFFFFF" > <div class = "head" >与旧版页面相比较您觉得新版页面：</div><br> <? if (!isset( $submit )){ ?> <form action= "myPolls.php3" method= "get" > <input type= "radio" name= "poll_voteNr" value= "1" checked > <span class = "pt9" >信息量更大</span> <br> <input type= "radio" name= "poll_voteNr" value= "2" > <span class = "pt9" >网页更精美</span> <br> <input type= "radio" name= "poll_voteNr" value= "3" > <span class = "pt9" >没什么改进</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" >查看调查结果</A> </form> <? /* 如果想增加其它的选项可直接加上即可 */ } else { $descArray = array (1=> "信息量更大" , 2=> "网页更精美" , 3=> "没什么改进" , 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编历数组 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 "总共投票次数:<font color=red> $poll_sum</font>" ; echo $poll_tableFooter ; echo "<br>" ; echo "<input type=" submit " name=" Submit1 " value=" 返回主页 " 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>
注释：从上面我们可以看出该投票系统的基本过程：

1、打开文件取得数据到数组$curArray（文件不存在则初始化数组$curArray）

2、编历数组，处理数据得到所需值

3、计算百分比，控制统计bar图像宽度

4、将数据保存到"data.pol"中

这里有一点是需要注意：这里的data.pol文本文件需要有写权限。

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更新时间：2022-09-14 阅读：47次

PHP新手上路（九） 投票系统

PHP新手上路（九）投票系统