更新查询更新不起作用
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【中文标题】更新查询更新不起作用【英文标题】：Update query update not work 【发布时间】：2015-01-19 05:00:53 【问题描述】：我在 php 中进行添加、更新和删除操作。
一切正常，但我的更新查询不工作。
我能知道，我在更新查询中哪里出错了吗？
这是我的 update.php 文件代码..
<?php
include('connection.php');
$ID = $_REQUEST['Student_Id'];
$result = mysql_query("select* from tblstudent where Student_Id='".$ID."'");
while($oldvalue= mysql_fetch_array($result))
$oldname=$oldvalue['Student_Name'];
$oldgender=$oldvalue['Gender'];
$olddob=$oldvalue['DOB'];
$oldaddress=$oldvalue['Address'];
$oldmobileno=$oldvalue['Phone'];
$olddivision=$oldvalue['Division'];
$oldclass=$oldvalue['Class'];
$oldemail=$oldvalue['Email_Id'];
if(isset ($_POST['submit']))
$update = $_POST['submit'];
if($update)
$newname=$_POST['Student_Name'];
$newgender=$_POST['Gender'];
$newdob=$_POST['DOB'];
$newaddress=$_POST['Address'];
$newmobileno=$_POST['Phone'];
$newdivision=$_POST['Division'];
$newclass=$_POST['Class'];
$newemail=$_POST['Email_Id'];
/* UPDATE QUERY */
mysql_query("UPDATE tblstuent SET Student_Name='$newname', Gender='$newgender', DOB='$newdob', Address='$newaddress', Phone='$newmobileno', Division='$newdivision', Class='$newclass', Email_Id='$newemail'
WHERE id='$ID'");
header('location:index.php');
?>
<body>
<form action="update.php" method="post">
<fieldset>
<legend>Personal Information</legend><br/>
<div class="studentname"><label>Student Name :</label><input type="text" name="newstudentname" id="studentnameId" value="<?php echo $oldname ?>" placeholder="Enter Name" size="30px" /></div><br/>
<div class="gender">
<label>Gender :</label>
<input type="radio" name="type" value="Male" <?php echo ($oldgender == 'Male') ? 'checked' : ''; ?> /> Male
<input type="radio" name="type" value="Female" <?php echo ($oldgender == 'Female') ? 'checked' : ''; ?>/> Female<br />
</div> <br/>
<div class="dob"><label>Date of Birth :</label><input type="text" name="dob" id="dobId" value="<?php echo $olddob ?>" placeholder="Enter DOB format Year-Month-DaY" size="30px" /></div><br/>
<div class="address"><label class="addresschild">Address : </label><textarea rows="4" cols="21" name="address" id="addressId" value="" placeholder="Enter Your Address"><?php echo $oldaddress ?></textarea></div><br/>
<div class="mobileno"><label>Parent's Mobile No : </label><input type="text" name="mobileno" id="mobilenoId" value="<?php echo $oldmobileno ?>" placeholder="Enter Parent's Mobile No" size="30px" /></div><br/>
<div class="selectdivision">
<label>Divison :</label>
<select id="divisiondropdownId" name="divisiondropdown">
<option value="0">Select Division</option>
<option value="A"<?php if($olddivision=="A") echo 'selected="selected"'; ?> >A</option>
<option value="B"<?php if($olddivision=="B") echo 'selected="selected"'; ?> >B</option>
<option value="C"<?php if($olddivision=="C") echo 'selected="selected"'; ?> >C</option>
</select>
</div><br/>
<div class="selectclass">
<label>Class :</label>
<select id="classdropdownId" name="classdropdown">
<option value="0">Select Class</option>
<option value="First"<?php if($oldclass=="First") echo 'selected="selected"'; ?>>First</option>
<option value="Second"<?php if($oldclass=="Second") echo 'selected="selected"'; ?>>Second</option>
<option value="Third"<?php if($oldclass=="Third") echo 'selected="selected"'; ?>>Third</option>
<option value="Fourth"<?php if($oldclass=="Fourth") echo 'selected="selected"'; ?>>Fourth</option>
<option value="Fifth"<?php if($oldclass=="Fifth") echo 'selected="selected"'; ?>>Fifth</option>
<option value="Sixth"<?php if($oldclass=="Sixth") echo 'selected="selected"'; ?>>Sixth</option>
<option value="Seventh"<?php if($oldclass=="Seventh") echo 'selected="selected"'; ?>>Seventh</option>
<option value="Eighth"<?php if($oldclass=="Eighth") echo 'selected="selected"'; ?>>Eighth</option>
<option value="Nineth"<?php if($oldclass=="Nineth") echo 'selected="selected"'; ?>>Nineth</option>
<option value="Tenth"<?php if($oldclass=="Tenth") echo 'selected="selected"'; ?>>Tenth</option>
</select>
</div><br/>
<div class="emailid"><label>Email-Id : </label><input type="text" name="emailid" id="emailId" value="<?php echo $oldemail ?>" placeholder="Enter your Email-id" size="30px" /></div><br/>
<div id="submit1">
<input class="btnsubmit" type="submit" name="submit" id="submit" value="Submit" />
<input class="btnreset" type="reset" name="reset" id="submit" value="Reset" />
</div><br/>
</fieldset>
</form>
</body>谢谢
拉胡尔驳船
【问题讨论】：
你得到什么错误？（用于错误报告使用：<?php error_reporting(E_ALL); ini_set("display_errors", 1); ?>）在更新语句中的列名周围也加上`
再次检查您的查询，它有一个错字tblstuent，应该是tblstudent
@Yohanes Khosiawan :- 谢谢，但现在更新查询也不起作用。
@Rizier123 :- 我没有收到任何错误。
【参考方案1】：
除了拼写错误，你还用过
$ID = $_REQUEST['Student_Id'];
在您的代码中，我没有在您的表单中找到任何 id 为“Student_Id”的元素，因此 $ID 中将没有任何值，并且不会进行任何更新。
【讨论】：
【参考方案2】：试试这个：
Student_Name='$newname',
put $newname in double quotes like this.
Student_Name="$newname",
【讨论】：
【参考方案3】：很抱歉没有发表评论。我还没有50分。
我在您的查询中发现了一些错误。
-
表名。在选择查询中是
tblstudent，在更新查询中是tblstuent
'$newname' 最好像这样连接。 '".$newname."'。这应该适用于所有变量。
您的代码中没有STUDENT_ID。所以将其添加为隐藏字段。
确保列名的拼写方式与表中相同。简单/大写和拼写。
【讨论】：
【参考方案4】：如果您要更新同一张表，则应在下面的查询中传递 Student_Id 而不是 id，
mysql_query("UPDATE tblstuent SET Student_Name='$newname', Gender='$newgender', DOB='$newdob', Address='$newaddress', Phone='$newmobileno', Division='$newdivision', Class='$newclass', Email_Id='$newemail'
WHERE id='$ID'");
或者你设置了错误的表名 tblstuent ，如果你更新同一张表，它应该是 tblstudent 。
【讨论】：
【参考方案5】：在查询中检查所有列的数据类型，然后作为数据类型，如果数据类型如字符串、日期，则需要使用引号设置列值。否则不需要为良好的做法设置报价。在你的更新查询中你写错了表名，所以首先更新它。检查后
【讨论】：
【参考方案6】：我有一个 PDO 示例，并为您准备了语句。另外，如果我是你，我会从准备好的语句开始学习 PDO。 MySQL 已被弃用，可能会给您带来麻烦。
此示例使用 Student_Id 作为自动增量和主要
SelectStudentPage.php
<!DOCTYPE>
<html>
<head>
<title>Students</title>
</head>
<body>
<?php
$db_host = "localhost";
$db_username = "root";
$db_pass = "";
$db_name = "Studentsdb";
$db = new PDO('mysql:host='.$db_host.';dbname='.$db_name,$db_username,$db_pass);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
//prepared statement with PDO to query the database
$stmt = $db->prepare("SELECT * FROM tblstudent ");
$stmt->execute();
?>
<?php //start of the while loop ?>
<?php while( $row = $stmt->fetch(PDO::FETCH_ASSOC) ) ?>
<table border="1" style="table-layout: fixed; width: 1080px;">
<br>
<tr>
<th style="width:125px">STUDENT ID</th>
<th style="width:125px">STUDENT NAME</th>
<th style="width:100px">GENDER</th>
<th style="width:100px">DOB</th>
<th style="width:250px">ADDRESS</th>
<th style="width:100px">PHONE</th>
<th style="width:100px">DIVISION</th>
<th style="width:100px">CLASS</th>
<th style="width:250px">EMAIL ID</th>
</tr>
<tr style="width:25px">
<?php $id = $row['Student_Id'];?>
<?php echo "<td> <a href='StudentUpdateForm.php?Student_Id=$id'>$id</a></td>"?>
<td><?php echo $row['Student_Name']; ?></td>
<td><?php echo $row['Gender']; ?></td>
<td><?php echo $row['DOB']; ?></td>
<td><?php echo $row['Address']; ?></td>
<td><?php echo $row['Phone']; ?></td>
<td><?php echo $row['Division']; ?></td>
<td><?php echo $row['Class']; ?></td>
<td><?php echo $row['Email_Id']; ?></td>
</tr>
</table>
<?php //end of the while loop?>
</body>
</html>
StudentUpdateForm.php
<?php
$db_host = "localhost";
$db_username = "root";
$db_pass = "";
$db_name = "Studentsdb";
$db = new PDO('mysql:host='.$db_host.';dbname='.$db_name,$db_username,$db_pass);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
$id=$_GET['Student_Id'];
$result = $db->prepare("SELECT * FROM tblstudent Where Student_Id=:Student_Id");
$result->bindParam(':Student_Id', $id);
$result->execute();
for($i=0; $row = $result->fetch(); $i++)
?>
<!DOCTYPE>
<html>
<head>
<title>Example Update Form</title>
</head>
<body>
<form action="UpdateProcess.php" method="post">
<legend>Personal Information</legend><br>
<div>
<label>Student Id :<label><input name="Student_Id" type="text" value=
"<?php print($row['Student_Id']) ?>">
</div><br>
<div>
<label>Student Name :</label><input name="Student_Name" type="text" value=
"<?php print($row['Student_Name']) ?>">
</div><br>
<div>
<label>Gender :</label>
<select name ="Gender" style="width: 149px" >
<option value <?php if ($row['Gender']==1) print('selected'); ?> ="Male">Male</option>
<option value <?php if ($row['Gender']==2) print('selected'); ?> ="Female">Female</option>
</select>
</div><br>
<div>
<label>Date of Birth :</label><input name="DOB" type="text" value=
"<?php print($row['DOB']) ?>">
</div><br>
<div>
<label>Address :</label><textarea name="Address"><?php echo $row['Address']; ?></textarea><br>
</div><br>
<div>
<label>parents mobile no:</label><input name="Phone" type="text"value=
"<?php print($row['Phone']) ?>">
</div><br>
<div>
<label>Divison :</label><br>
<select name ="Division" style="width: 149px" >
<option value <?php if ($row['Division']==1) print('selected'); ?> ="A">A</option>
<option value <?php if ($row['Division']==2) print('selected'); ?> ="B">B</option>
<option value <?php if ($row['Division']==3) print('selected'); ?> ="C">C</option>
</select>
</div><br>
<div>
<label>Class :</label><br>
<select name ="Class" style="width: 149px" >
<option value <?php if ($row['Class']==1) print('selected'); ?> ="First">First</option>
<option value <?php if ($row['Class']==2) print('selected'); ?> ="Second">Second</option>
<option value <?php if ($row['Class']==3) print('selected'); ?> ="Third">Third</option>
</select>
</div><br>
<div>
<label>Email id :</label><input name="Email_Id" type="text" value=
"<?php print($row['Email_Id']) ?>">
</div><br>
<div id="submit1">
<input class="btnsubmit" id="submit" name="submit" type="submit"
value="Update"> <input class="btnreset" id="submit" name="reset"
type="reset" value="Reset">
</div><br>
</form>
</body>
</html>
<?php ?>
UpdateProcess.php
<?php
$db_host = "localhost";
$db_username = "root";
$db_pass = "";
$db_name = "Studentsdb";
try
$db = new PDO('mysql:host='.$db_host.';dbname='.$db_name,$db_username,$db_pass);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
$sql = 'UPDATE tblstudent SET Student_Id=:Student_Id, Student_Name=:Student_Name, Gender=:Gender, DOB=:DOB, Address=:Address, Phone=:Phone, Division=:Division, Class=:Class, Email_Id=:Email_Id WHERE Student_Id=:Student_Id';
$stmt = $db->prepare($sql);
$stmt->bindParam(':Student_Id', $_POST['Student_Id'], PDO::PARAM_STR);
$stmt->bindParam(':Student_Name', $_POST['Student_Name'], PDO::PARAM_STR);
$stmt->bindParam(':Gender', $_POST['Gender'], PDO::PARAM_STR);
$stmt->bindParam(':DOB', $_POST['DOB'], PDO::PARAM_STR);
$stmt->bindParam(':Address', $_POST['Address'], PDO::PARAM_STR);
$stmt->bindParam(':Phone', $_POST['Phone'], PDO::PARAM_STR);
$stmt->bindParam(':Division', $_POST['Division'], PDO::PARAM_STR);
$stmt->bindParam(':Class', $_POST['Class'], PDO::PARAM_STR);
$stmt->bindParam(':Email_Id', $_POST['Email_Id'], PDO::PARAM_STR);
$stmt->execute();
echo $stmt->rowCount() . " record Updated successfully.";
catch(PDOException $exception)
echo "Error: " . $exception->getMessage();
echo "<a href=http://localhost/students/SelectStudentPage.php>Go to Grid view Results page</a>";
?>
【讨论】：
【参考方案7】： $sql = "SELECT * FROM table WHERE id = '$id' " ;
while($oldvalue= mysql_fetch_array($result))
$oldname=$oldvalue['Student_Name'];
$oldgender=$oldvalue['Gender'];
$olddob=$oldvalue['DOB'];
$oldaddress=$oldvalue['Address'];
$oldmobileno=$oldvalue['Phone'];
$olddivision=$oldvalue['Division'];
$oldclass=$oldvalue['Class'];
$oldemail=$oldvalue['Email_Id'];
if(mysql_query("DESCRIBE `table`"))
$sql = "UPDATE table SET ";
$sql.= " Student_Name = '$oldname', Gender = '$oldgender',.... ";
$sql.= " WHERE id = '$id' ";
if(mysql_query($sql))
echo 'Good';
else
echo 'Bad';
试试这样的；）
【讨论】：
【参考方案8】：你好朋友谢谢你，
您的所有回答都帮助我解决了问题。
我从你们那里学到了很多。
最后我解决了上述问题，对 update.php 文件代码进行了一些更改..
这是我的新代码
<?php
include('connection.php');
if(isset ($_REQUEST['Student_Id']))
$id = $_REQUEST['Student_Id'];
$result = mysql_query("select* from tblstudent where Student_Id ='".$id."'");
while($oldvalue= mysql_fetch_array($result))
$oldid = $oldvalue['Student_Id'];
$oldname=$oldvalue['Student_Name'];
$oldgender=$oldvalue['Gender'];
$olddob=$oldvalue['DOB'];
$oldaddress=$oldvalue['Address'];
$oldmobileno=$oldvalue['Phone'];
$olddivision=$oldvalue['Division'];
$oldclass=$oldvalue['Class'];
$oldemail=$oldvalue['Email_Id'];
if(isset ($_POST['newname']))
$newname =$_POST['newname'];
$newid =$_POST['newid'];
$newgender =$_POST['newgender'];
$newdob = $_POST['newdob'];
$newaddress = $_POST['newaddress'];
$newphone = $_POST['newphone'];
$newdivision = $_POST['newdivision'];
$newclass = $_POST['newclass'];
$newemailid = $_POST['newemailid'];
$sql= "UPDATE tblstudent SET Student_Name='$newname', Gender='$newgender', DOB='$newdob', Address='$newaddress', Phone='$newphone', Division='$newdivision', Class='$newclass', Email_Id='$newemailid' WHERE Student_Id='$newid'";
$result= mysql_query($sql);
header('location:index.php');
?>
<body>
<form action="update.php" method="post">
<fieldset>
<legend>Personal Information</legend><br/>
<div class="studentname"><label>Student Name :</label><input type="text" name="newname" id="studentnameId" value="<?php echo $oldname ?>" placeholder="Enter First & Last Name" size="30px" /></div><br/>
<input type="hidden" name="newid" value="<?php echo $oldid ?>"/>
<div class="gender">
<label>Gender :</label>
<input type="radio" name="newgender" value="Male" <?php echo ($oldgender == 'Male') ? 'checked' : ''; ?> /> Male
<input type="radio" name="newgender" value="Female" <?php echo ($oldgender == 'Female') ? 'checked' : ''; ?>/> Female<br />
</div> <br/>
<div class="dob"><label>Date of Birth :</label><input type="text" name="newdob" id="dobId" value="<?php echo $olddob ?>" placeholder="Enter DOB format Year-Month-DaY" size="30px" /></div><br/>
<div class="address"><label class="addresschild">Address : </label><textarea rows="4" cols="21" name="newaddress" id="addressId" value="" placeholder="Enter Your Address"><?php echo $oldaddress ?></textarea></div><br/>
<div class="mobileno"><label>Parent's Mobile No : </label><input type="text" name="newphone" id="mobilenoId" value="<?php echo $oldmobileno ?>" placeholder="Enter Parent's Mobile No" size="30px" /></div><br/>
<div class="selectdivision">
<label>Divison :</label>
<select id="divisiondropdownId" name="newdivision">
<option value="0">Select Division</option>
<option value="A"<?php if($olddivision=="A") echo 'selected="selected"'; ?> >A</option>
<option value="B"<?php if($olddivision=="B") echo 'selected="selected"'; ?> >B</option>
<option value="C"<?php if($olddivision=="C") echo 'selected="selected"'; ?> >C</option>
</select>
</div><br/>
<div class="selectclass">
<label>Class :</label>
<select id="classdropdownId" name="newclass">
<option value="0">Select Class</option>
<option value="First"<?php if($oldclass=="First") echo 'selected="selected"'; ?>>First</option>
<option value="Second"<?php if($oldclass=="Second") echo 'selected="selected"'; ?>>Second</option>
<option value="Third"<?php if($oldclass=="Third") echo 'selected="selected"'; ?>>Third</option>
<option value="Fourth"<?php if($oldclass=="Fourth") echo 'selected="selected"'; ?>>Fourth</option>
<option value="Fifth"<?php if($oldclass=="Fifth") echo 'selected="selected"'; ?>>Fifth</option>
<option value="Sixth"<?php if($oldclass=="Sixth") echo 'selected="selected"'; ?>>Sixth</option>
<option value="Seventh"<?php if($oldclass=="Seventh") echo 'selected="selected"'; ?>>Seventh</option>
<option value="Eighth"<?php if($oldclass=="Eighth") echo 'selected="selected"'; ?>>Eighth</option>
<option value="Nineth"<?php if($oldclass=="Nineth") echo 'selected="selected"'; ?>>Nineth</option>
<option value="Tenth"<?php if($oldclass=="Tenth") echo 'selected="selected"'; ?>>Tenth</option>
</select>
</div><br/>
<div class="emailid"><label>Email-Id : </label><input type="text" name="newemailid" id="emailId" value="<?php echo $oldemail ?>" placeholder="Enter your Email-id" size="30px" /></div><br/>
<div id="submit1">
<input class="btnsubmit" type="submit" name="submit" id="submit" value="Submit" />
<input class="btnreset" type="reset" name="reset" id="submit" value="Reset" />
</div><br/>
</fieldset>
</form>
</body>谢谢你:-)
【讨论】：
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