Question

我想通过添加多个主题来更新主题和其他字段，但问题是它只保存了我检查过的主题之一。

我该如何解决这个问题？

以下是我的代码：

<?php
$status = "";
if(isset($_POST['new']) && $_POST['new']==1)
{
$host="localhost";//host name  
$username="root"; //database username  
$word="";//database word  
$db_name="tuichk";//database name  
$tbl_name="data"; //table name  
$con=mysqli_connect("$host", "$username", "$word","$db_name")or die("cannot connect");//connection string 
$id=$_REQUEST['id'];
$name =$_REQUEST['name'];
$stu_ic = $_REQUEST['stu_ic'];
$address = $_REQUEST['address'];
$contact = $_REQUEST['contact'];
$checkbox1=$_REQUEST['subject'];
$chk=""; 

$update="update data set name='".$name."', stu_ic='".$stu_ic."', address='".$address."', contact='".$contact."', sub='".$checkbox1."' where id='".$id."'";
mysql_query($update) or die(mysql_error());
$status = "Record Updated Successfully. </br></br><a href='view.php'>View Updated Record</a>";
echo '<p style="color:#FF0000;">'.$status.'</p>';
}else {
?>

这是我的html表单

<form name="form" method="post" action=""> 
<input type="hidden" name="new" value="1" />
<input name="id" type="hidden" value="<?php echo $row['id'];?>" />
<p><input type="text" name="name" placeholder="Enter Name" required value="<?php echo $row['name'];?>" /><input type="text" name="stu_ic" placeholder="Enter Student IC" required value="<?php echo $row['stu_ic'];?>" /></p>
<p><input type="text" name="address" placeholder="Enter Address" required value="<?php echo $row['address'];?>" /><input type="text" name="contact" placeholder="Enter Contact" required value="<?php echo $row['contact'];?>" /></p>
<div style="text-align:center">
   <div style="width:400px;border-radius:6px;margin:0px auto">  
<table border="1">  
   <tr>  
      <td colspan="2">Select Subject:</td>  
   </tr>  
   <tr>  
      <td>Bahasa Melayu</td>  
      <td><input type="checkbox" name="subject" value="Bahasa Melayu"></td>  
   </tr>  
   <tr>  
      <td>English</td>  
      <td><input type="checkbox" name="subject" value="English"></td>  
   </tr>  
   <tr>  
      <td>Mathematics</td>  
      <td><input type="checkbox" name="subject" value="Mathematics"></td>  
   </tr>  
   <tr>  
      <td>Science</td>  
      <td><input type="checkbox" name="subject" value="Science"></td>  
   </tr>  
   <tr>  
      <td>Sejarah</td>  
      <td><input type="checkbox" name="subject" value="Sejarah"></td>  
   </tr>
   <tr>  
      <td>Geography</td>  
      <td><input type="checkbox" name="subject" value="Geography"></td>  
   </tr>
   <tr>  
      <td>Additional Mathematics</td>  
      <td><input type="checkbox" name="subject" value="Additional Mathematics"></td>  
   </tr>
   <tr>  
      <td>Chemistry</td>  
      <td><input type="checkbox" name="subject" value="Chemistry"></td>  
   </tr>
   <tr>  
      <td>Physics</td>  
      <td><input type="checkbox" name="subject" value="Physics"></td>  
   </tr>
   <tr>  
      <td>Biology</td>  
      <td><input type="checkbox" name="subject" value="Biology"></td>  
   </tr><tr>  
      <td>Principle Of Accounting</td>  
      <td><input type="checkbox" name="subject" value="Principle Of Accounting"></td>  
   </tr><tr>  
      <td>Ekonomi Asas</td>  
      <td><input type="checkbox" name="subject" value="Ekonomi Asas"></td>  
   </tr><tr>  
      <td>Perdagangan</td>  
      <td><input type="checkbox" name="subject" value="Perdagangan"></td>  
   </tr>  
</table> 
</div>  
</form>

Answer 1

HTML输入应为

<input type="checkbox" name="subject[]" value="Subject1">
<input type="checkbox" name="subject[]" value="Subject2">

在PHP中有很多选择。

选项1：

将主题保存为字符串

$subjects = implode(',', $_POST['subject']);

检索为字符串并转换为数组

$subjects = explode(',', $field);

选项2：可以保存为JSON并检索为JSON并对其进行解码。

Answer 2

这是我的代码inc html形式：

<?php
$status = "";
if(isset($_POST['new']) && $_POST['new']==1)
{
$host="localhost";//host name  
$username="root"; //database username  
$word="";//database word  
$db_name="tuichk";//database name  
$tbl_name="data"; //table name  
$con=mysqli_connect("$host", "$username", "$word","$db_name")or die("cannot connect");//connection string 
$id=$_REQUEST['id'];
$name =$_REQUEST['name'];
$stu_ic = $_REQUEST['stu_ic'];
$address = $_REQUEST['address'];
$contact = $_REQUEST['contact'];
$checkbox1=$_REQUEST['subject'];
$subjects = implode(',', $_POST['subject']);
$subjects = explode(',', $field);
$chk=""; 

$update="update data set name='".$name."', stu_ic='".$stu_ic."', address='".$address."', contact='".$contact."', sub='".$checkbox1."' where id='".$id."'";
mysql_query($update) or die(mysql_error());
$status = "Record Updated Successfully. </br></br><a href='view.php'>View Updated Record</a>";
echo '<p style="color:#FF0000;">'.$status.'</p>';
}else {
?>
<div>
<form name="form" method="post" action=""> 
<input type="hidden" name="new" value="1" />
<input name="id" type="hidden" value="<?php echo $row['id'];?>" />
<p><input type="text" name="name" placeholder="Enter Name" required value="<?php echo $row['name'];?>" /><input type="text" name="stu_ic" placeholder="Enter Student IC" required value="<?php echo $row['stu_ic'];?>" /></p>
<p><input type="text" name="address" placeholder="Enter Address" required value="<?php echo $row['address'];?>" /><input type="text" name="contact" placeholder="Enter Contact" required value="<?php echo $row['contact'];?>" /></p>
<div style="text-align:center">
   <div style="width:400px;border-radius:6px;margin:0px auto">  
<table border="1">  
   <tr>  
      <td colspan="2">Select Subject:</td>  
   </tr>  
   <tr>  
      <td>Bahasa Melayu</td>  
      <td><input type="checkbox" name="subject[]" value="Bahasa Melayu"></td>  
   </tr>  
   <tr>  
      <td>English</td>  
      <td><input type="checkbox" name="subject[]" value="English"></td>  
   </tr>  
   <tr>  
      <td>Mathematics</td>  
      <td><input type="checkbox" name="subject[]" value="Mathematics"></td>  
   </tr>  
   <tr>  
      <td>Science</td>  
      <td><input type="checkbox" name="subject[]" value="Science"></td>  
   </tr>  
   <tr>  
      <td>Sejarah</td>  
      <td><input type="checkbox" name="subject[]" value="Sejarah"></td>  
   </tr>
   <tr>  
      <td>Geography</td>  
      <td><input type="checkbox" name="subject[]" value="Geography"></td>  
   </tr>
   <tr>  
      <td>Additional Mathematics</td>  
      <td><input type="checkbox" name="subject[]" value="Additional Mathematics"></td>  
   </tr>
   <tr>  
      <td>Chemistry</td>  
      <td><input type="checkbox" name="subject[]" value="Chemistry"></td>  
   </tr>
   <tr>  
      <td>Physics</td>  
      <td><input type="checkbox" name="subject[]" value="Physics"></td>  
   </tr>
   <tr>  
      <td>Biology</td>  
      <td><input type="checkbox" name="subject[]" value="Biology"></td>  
   </tr><tr>  
      <td>Principle Of Accounting</td>  
      <td><input type="checkbox" name="subject[]" value="Principle Of Accounting"></td>  
   </tr><tr>  
      <td>Ekonomi Asas</td>  
      <td><input type="checkbox" name="subject[]" value="Ekonomi Asas"></td>  
   </tr><tr>  
      <td>Perdagangan</td>  
      <td><input type="checkbox" name="subject[]" value="Perdagangan"></td>  
   </tr>  
</table> 
</div>  
</form>  
<p><input name="submit" type="submit" value="Update" /></p>
</form>
<?php } ?>

如何更新多个复选框

2 个答案: