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本文实例为大家分享了php查询操作实现投票功能的代码,供大家参考,具体内容如下
题目:



解题方法汇总:

方法一:
1. 投票主页面:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>投票</title><style>#list{width:400px;height:300px;}#jieguo{width:400px;height:300px;}.x{ float:left;} </style></head> <body> <form action="TouChuLi.php" method="post"><?phpinclude ("DBDA.class.php");$db=new DBDA();//从调研题目表中找出题目代号和名称$sql="select * from diaoyantimu limit 0,1";$arr=$db->query($sql);$tmmc=$arr[0][1];$tmdh=$arr[0][0];echo "<div><h2>{$tmmc}:</h2></div>";//从调研选项表中输出选项内容:$sqlxx="select * from diaoyanxuanxiang where timudaihao="{$tmdh}"";$arrxx=$db->query($sqlxx);echo "<div id="list">";foreach ($arrxx as $v){echo "<div><input type="checkbox" value="{$v[0]}" name="xx[]">{$v[1]}</div><br />";} ?><input type="submit" value="提交"><input type="button" value="查看结果" id="check" onclick="Showjieguo()"></form></div> <div id="jieguo" style="display:none"><?php//计算总人数:$sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao="{$tmdh}"";$zrs=$db->query($sqlzs); foreach ($arrxx as $v){ $name=$v[1];$number=$v[2];if($zrs[0][0]==0) { $bfb = 0; } else { $bfb = ($number/$zrs[0][0])*100; }$bfb=round($bfb,2);echo "<div><span class="x">{$name} </span><div class="x" style="width:200px; height:10px; background-color:#808080"><div style="width:{$bfb}%; height:10px; background-color:#FF8040"> </div></div><span class="x">{$number} </span><span class="x">{$bfb}% </span></div><br />"; }?><input type="button" value="返回" id="fanhui" onclick="Showfanhui()"></div><script>function Showjieguo(){document.getElementById("list").style.display="none";document.getElementById("jieguo").style.display="block";}function Showfanhui(){document.getElementById("list").style.display="block";document.getElementById("jieguo").style.display="none";}</script> </body></html>
2.处理投票页面:

<?php$arr=$_POST["xx"];include ("../DBDA.class.php");$db=new DBDA();foreach($arr as $v){$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids = "{$v}"";$db->Query($sql,1);//1代表$sql的类型}header ("location:TouPiao.php");?>
3. 建立访问数据库的类,封装用于引用:

<?php//执行一个sql语句,返回相应的结果class DBDA{public $host="localhost";//数据库服务器地址public $uid="root";//数据库用户名public $password="";//数据库密码//执行SQL语句的方法//参数里面:$sql代表要执行的sql语句;$type是sql语句的类型,0代表查询,1代表其他(增删改);$db代表要操作的数据库function Query($sql,$type=0,$db="mydb"){//造连接对象$dbconnect=new MySQLi($this->host,$this->uid,$this->password,$db);//判断连接是否出错!mysqli_connect_error() or die("连接失败!");//执行sql语句$result=$dbconnect->query($sql);//判断SQL语句类型if($type==0){ //如果是查询语句返回结果集的二维数组return $result->fetch_all();}else{//如果是其他语句,返回true或falsereturn $result;} } }
方法二:
1. 投票主页面:

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>投票</title><style>.x{ float:left;} </style></head> <body> <form action="TouChuLi.php" method="post"><?phpinclude ("../DBDA.class.php");$db=new DBDA();//从调研题目表中找出题目代号和名称$sql="select * from diaoyantimu limit 0,1";$arr=$db->query($sql);$tmmc=$arr[0][1];$tmdh=$arr[0][0];echo "<div><h2>{$tmmc}:</h2></div>";//从调研选项表中输出选项内容:$sqlxx="select * from diaoyanxuanxiang where timudaihao="{$tmdh}"";$arrxx=$db->query($sqlxx);echo "<div id="list">";foreach ($arrxx as $v){echo "<div><input type="checkbox" value="{$v[0]}" name="xx[]">{$v[1]}</div><br />";} ?><input type="submit" value="提交"><a href="ChaKan.php"><input type="button" value="查看结果" id="check" ></a></form></body></html>
2. 处理投票页面:

<?php$arr=$_POST["xx"];include ("../DBDA.class.php");$db=new DBDA();foreach($arr as $v){$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids = "{$v}"";$db->Query($sql,1);//1代表$sql的类型}header ("location:TouPiao.php");?>
3. 查看投票结果页面:

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>查看结果</title><style>.x{float:left;}</style></head><body> <?phpinclude ("../DBDA.class.php");$db=new DBDA();//从调研题目表中找出题目代号和名称$sql="select * from diaoyantimu limit 0,1";$arr=$db->query($sql);$tmmc=$arr[0][1];echo "<div><h2>{$tmmc}:</h2></div>";//从调研选项表中输出选项内容:$sqlxx="select * from diaoyanxuanxiang where timudaihao="{$arr[0][0]}"";$arrxx=$db->query($sqlxx); //计算总人数:$sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao="{$arr[0][0]}"";$zrs=$db->query($sqlzs); foreach ($arrxx as $v){ $name=$v[1];//调研项目名称 $number=$v[2];//选择该项的人数 //判断总人数是否为0 if($zrs[0][0]==0) { $bfb = 0; } else { $bfb = ($number/$zrs[0][0])*100;//求百分比 } $bfb=round($bfb,2); //取小数点后两位echo "<div><span class="x">{$name} </span><div class="x" style="width:200px; height:10px; background-color:#808080"><div style="width:{$bfb}%; height:10px; background-color:#FF8040"> </div></div><span class="x">{$number} </span><span class="x">{$bfb}%</span><br /></div><br />"; }?><br /><a href="TouPiao.php"><input type="button" value="返回"></a></body></html>

显示结果:



以上就是本文的全部内容,希望对大家学习php程序设计有所帮助。