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本篇文章為大家展示了php中怎么實(shí)現(xiàn)查詢操作,內(nèi)容簡(jiǎn)明扼要并且容易理解,絕對(duì)能使你眼前一亮,通過(guò)這篇文章的詳細(xì)介紹希望你能有所收獲。
方法一:
1. 投票主頁(yè)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(diào)研題目表中找出題目代號(hào)和名稱 $sql="select * from diaoyantimu limit 0,1"; $arr=$db->query($sql); $tmmc=$arr[0][1]; $tmdh=$arr[0][0]; echo "<div><h3>{$tmmc}:</h3></div>"; //從調(diào)研選項(xiàng)表中輸出選項(xiàng)內(nèi)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(jié)果" id="check" onclick="Showjieguo()"> </form> </div> <div id="jieguo" > <?php //計(jì)算總?cè)藬?shù): $sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao='{$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(yè)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(wèn)數(shù)據(jù)庫(kù)的類,封裝用于引用:
<?php //執(zhí)行一個(gè)sql語(yǔ)句,返回相應(yīng)的結(jié)果 class DBDA { public $host="localhost";//數(shù)據(jù)庫(kù)服務(wù)器地址 public $uid="root";//數(shù)據(jù)庫(kù)用戶名 public $password="";//數(shù)據(jù)庫(kù)密碼 //執(zhí)行SQL語(yǔ)句的方法 //參數(shù)里面:$sql代表要執(zhí)行的sql語(yǔ)句;$type是sql語(yǔ)句的類型,0代表查詢,1代表其他(增刪改);$db代表要操作的數(shù)據(jù)庫(kù) function Query($sql,$type=0,$db="mydb") { //造連接對(duì)象 $dbconnect=new MySQLi($this->host,$this->uid,$this->password,$db); //判斷連接是否出錯(cuò) !mysqli_connect_error() or die("連接失??!"); //執(zhí)行sql語(yǔ)句 $result=$dbconnect->query($sql); //判斷SQL語(yǔ)句類型 if($type==0) { //如果是查詢語(yǔ)句返回結(jié)果集的二維數(shù)組 return $result->fetch_all(); } else { //如果是其他語(yǔ)句,返回true或false return $result; } } }
方法二:
1. 投票主頁(yè)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(diào)研題目表中找出題目代號(hào)和名稱 $sql="select * from diaoyantimu limit 0,1"; $arr=$db->query($sql); $tmmc=$arr[0][1]; $tmdh=$arr[0][0]; echo "<div><h3>{$tmmc}:</h3></div>"; //從調(diào)研選項(xiàng)表中輸出選項(xiàng)內(nèi)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(jié)果" id="check" ></a> </form> </body> </html>
2. 處理投票頁(yè)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(jié)果頁(yè)面:
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>查看結(jié)果</title> <style> .x { float:left;} </style> </head> <body> <?php include ("../DBDA.class.php"); $db=new DBDA(); //從調(diào)研題目表中找出題目代號(hào)和名稱 $sql="select * from diaoyantimu limit 0,1"; $arr=$db->query($sql); $tmmc=$arr[0][1]; echo "<div><h3>{$tmmc}:</h3></div>"; //從調(diào)研選項(xiàng)表中輸出選項(xiàng)內(nèi)容: $sqlxx="select * from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'"; $arrxx=$db->query($sqlxx); //計(jì)算總?cè)藬?shù): $sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'"; $zrs=$db->query($sqlzs); foreach ($arrxx as $v) { $name=$v[1];//調(diào)研項(xiàng)目名稱 $number=$v[2];//選擇該項(xiàng)的人數(shù) //判斷總?cè)藬?shù)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(shù)點(diǎn)后兩位 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>
上述內(nèi)容就是php中怎么實(shí)現(xiàn)查詢操作,你們學(xué)到知識(shí)或技能了嗎?如果還想學(xué)到更多技能或者豐富自己的知識(shí)儲(chǔ)備,歡迎關(guān)注億速云行業(yè)資訊頻道。
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