一个小巧的带图形结果的网上投票与统计程序

说明：


    近日研究PHP的图形函数，有一些心得，制作一个网上投票与统计程序与大家共同探讨。本程序由poll_counter.php与count_image.php两个文件组成，总共代码91行。程序执行后还会产生两个文件poll_count.txt和poll_addr.txt，程序带有控制投票功能，同一IP在一定时间内不能反复投票。程序最多可有七个投票项目，具体请修改poll_counter.php文件开始处的“初始化”部分，程序不足之处请大家指正。





1．poll_counter.php-----------------------------------------------------------





<script language='JavaScript'><!-- 


    function MM_openBrWindow(theURL,winName,features)


    {window.open(theURL,winName,features);}


--></script>


<? 


  echo "<style type='text/css'><!-- .dkj {  font-size: 9pt} --></style>";


  //初始化


  $title="你怎么看待台湾问题？";


  $content="武力解决,和平解决,让台湾独立,民主投票解决";


  $counter_file="poll_count.txt";


  $addr_file="poll_addr.txt";


  $content=split(",",$content);


  $color=split(",","#0080ff,#ff0000,#008000,#ff80ff,#ff8040,#080000,#808080");


  if (file_exists($counter_file)) // 如果存放计数器文件已经存在，读取其中的内容 


  { 


    $fp=fopen($counter_file,"r"); 


    $count=split(",",fgets($fp,40)); 


    fclose($fp); 


  } 


  else


  {$count=split(",","0,0,0,0,0,0,0");}


  if ($submit) //统计投票


  {


    //控制投票


    if (file_exists($addr_file)) // 如果存放投票地址的文件已经存在，读取其中的内容并进行检验


    { 


      $fp=fopen($addr_file,"r"); 


      $addr=split(",",fgets($fp,200)); 


      fclose($fp); 


    } 


    else


    {


      $addr=split(",","1,0,0,0,0,0,0,0,0,0,0"); 


    }


    $q=1;


    for ($i=1;$i<=10;$i++){if ($addr[$i]==$REMOTE_ADDR){$q=0;}}


    if ($q)


    {


      $count[$radiobutton]++;


      $fp=fopen($counter_file,"w"); 


      fputs($fp,implode(",",$count)); 


      fclose($fp); 


      $addr[$addr[0]]=$REMOTE_ADDR;


      $addr[0]++;


      if ($addr[0]>10){$addr[0]=1;}


      $fp=fopen($addr_file,"w"); 


      fputs($fp,implode(",",$addr)); 


      fclose($fp); 


    }


  }


  //产生投票界面


  $i=0;


  echo "<form method='post' action='$PHP_SELF'><table width='20%' border='0' cellspacing='0' cellpadding='0'><tr><td><div align='center' class='dkj'><b>$title</b></div></td></tr>";


  while (($content[$i]!="")and($i<7))


  {


    echo "<tr><td><div align='left'><table width='100%' border='0' cellspacing='0' cellpadding='0'><tr><td width='80%'><input type='radio' name='radiobutton' value='$i'><font color='$color[$i]' class='dkj'>$content[$i]</font></div></td><td class='dkj' width='20%'><div align='right'>$count[$i]</div></td></tr></table></tr>";


    $i++;


  }


  $i--;


  echo "<tr><td><div align='center'><input type='submit' name='submit' value='投票'>&nbsp;&nbsp<a href='#' onClick=\"MM_openBrWindow('count_image.php?count=".implode(",",$count)."&t=$i','查看投票结果','scrollbars=no,width=150,height=150')\"><input type='button' name='submit' value='结果'></a></div></td></tr></table></form>";


?>





2． count_image.php-----------------------------------------------------------





<?


  Header("Content-type: image/gif"); 


  //显示投票结果的子程序


  $x=0;


  $count=split(",",$count); 


  $im=imagecreate(140,120); //显示图形区域


  //配置颜色 


  $color[0]=imageColorallocate($im, 0,128,255);


  $color[1]=imageColorallocate($im, 255,0,0);


  $color[2]=imageColorallocate($im, 0,128,0);


  $color[3]=imageColorallocate($im, 255,128,255);


  $color[4]=imageColorallocate($im, 255,128,64);  


  $color[5]=imageColorallocate($im, 128,128,0);


  $color[6]=imageColorallocate($im, 128,128,128);


  $color[7]=imageColorallocate($im, 255,255,255);


  imagefill($im, 5, 5, $color[7]); //填充颜色


  for ($i=0;$i<=$t;$i++) //统计总投票人数


  {$total=$total+$count[$i];}


  for ($i=0;$i<=$t;$i++)


  {


    if ($total==0)


    {$y=0;}


    else


    {$y=Ceil($count[$i]/$total*100);}


    imagefilledrectangle($im, $x+$i*20, 100-$y, $x+$i*20+10, 100, $color[$i]); //画距型


    imagestring($im, 2, $x+$i*20, 104, "$y%", $red); //输出内容


  }


  imagegif($im); //完成图形


  imagedestroy($im); //释放内存


?>