本文實例為大家分享了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. 投票主頁面:
<!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"> <?php include ("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" > <?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. 建立訪問數據庫的類,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";//數據庫服務器地址 public $uid="root";//數據庫用戶名 public $password="";//數據庫密碼 //執行SQL語句的方法 //參數裡面:$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代表要操作的數據庫 function Query($sql,$type=0,$db="mydb") { //造連接對象 $dbconnect=new MySQLi($this->host,$this->uid,$this->password,$db); //判斷連接是否出錯 !mysqli_connect_error() or die("連接失敗!"); //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. 投票主頁面:
<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"> <?php include ("../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> <?php include ("../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程序設計有所幫助。