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：
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<!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：
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<?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：
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<?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false return $result; } } } |
方法二：
1. 投票主页面：
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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>投票</title><style>.x{ float:left;} </style></head> <body> <form action="touchuli.php" method="post"><?phpinclude ("../dbda.class.php");$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[]'>{$v[1]}</div><br />";} ?><input type="submit" value="提交"><a href="chakan.php"><input type="button" value="查看结果" id="check" ></a></form></body></html> |
2. 处理投票页面：
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<?php$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$sql的类型}header ("location:toupiao.php");?> |
3. 查看投票结果页面：
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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>查看结果</title><style>.x{ float:left;}</style></head><body> <?phpinclude ("../dbda.class.php");$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。
