php查询操作实现投票功能
这篇文章主要为大家详细介绍了php查询操作实现投票功能的具体代码,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
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"> < 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" > <? php include ("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" > <? php include ("../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 > <? php include ("../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:
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