本文執行個體為大家分享了php查詢操作實現投票功能的代碼，供大家參考，具體內容如下
題目：
解題方法匯總：
方法一：
1. 投票首頁面：
<!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");$db=new DBDA();//從調研題目表中找出題目代號和名稱$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>";//從調研選項表中輸出選項內容：$sqlxx="select * from diaoyanxuanxiang where timudaihao='{$tmdh}'";$arrxx=$db->query($sqlxx);echo "<div id='list'>";foreach ($arrxx as $v){ echo "<div><input type='checkbox' value='{$v[0]}' name='xx[]'>{$v[1]}</div><br />";} ?><input type="submit" value="提交"><input type="button" value="查看結果" id="check" onclick="Showjieguo()"></form></div> <div id="jieguo" style="display:none"><?php//計算總人數：$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.處理投票頁面：
<?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的類型}header ("location:TouPiao.php");?>
3. 建立訪問資料庫的類,封裝用於引用：
<?php//執行一個sql語句，返回相應的結果class DBDA{ public $host="localhost";//資料庫伺服器地址 public $uid="root";//資料庫使用者名稱 public $password="";//資料庫密碼 //執行SQL語句的方法 //參數裡面：$sql代表要執行的sql語句；$type是sql語句的類型，0代表查詢，1代表其他(增刪改)；$db代表要操作的資料庫 function Query($sql,$type=0,$db="mydb") { //造連線物件 $dbconnect=new MySQLi($this->host,$this->uid,$this->password,$db); //判斷串連是否出錯 !mysqli_connect_error() or die("串連失敗！"); //執行sql語句 $result=$dbconnect->query($sql); //判斷SQL語句類型 if($type==0) { //如果是查詢語句返回結果集的二維數組 return $result->fetch_all(); } else { //如果是其他語句，返回true或false return $result; } } }
方法二：
1. 投票首頁面：
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>投票</title><style>.x{ float:left;} </style></head> <body> <form action="TouChuLi.php" method="post"><?phpinclude ("../DBDA.class.php");$db=new DBDA();//從調研題目表中找出題目代號和名稱$sql="select * from diaoyantimu limit 0,1";$arr=$db->query($sql);$tmmc=$arr[0][1];$tmdh=$arr[0][0];echo "<div><h2>{$tmmc}:</h2></div>";//從調研選項表中輸出選項內容：$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[]'>{$v[1]}</div><br />";} ?><input type="submit" value="提交"><a href="ChaKan.php"><input type="button" value="查看結果" id="check" ></a></form></body></html>
2. 處理投票頁面：
<?php$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$sql的類型}header ("location:TouPiao.php");?>
3. 查看投票結果頁面：
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>查看結果</title><style>.x{ float:left;}</style></head><body> <?phpinclude ("../DBDA.class.php");$db=new DBDA();//從調研題目表中找出題目代號和名稱$sql="select * from diaoyantimu limit 0,1";$arr=$db->query($sql);$tmmc=$arr[0][1];echo "<div><h2>{$tmmc}:</h2></div>";//從調研選項表中輸出選項內容：$sqlxx="select * from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'";$arrxx=$db->query($sqlxx); //計算總人數：$sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'";$zrs=$db->query($sqlzs); foreach ($arrxx as $v){ $name=$v[1];//調研項目名稱 $number=$v[2];//選擇該項的人數 //判斷總人數是否為0 if($zrs[0][0]==0) { $bfb = 0; } else { $bfb = ($number/$zrs[0][0])*100;//求百分比 } $bfb=round($bfb,2); //取小數點後兩位 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>
顯示結果：
以上就是本文的全部內容，希望對大家學習php程式設計有所協助。
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