Values are not updating in database - php

Question

I have one table , in that i have 4 text fields. So when i enter the values in all text field box. And when i press Update button. The entered values are not showing in my database. Here is my code :
This below code is for textfield box:
<td class="answer">
<input type="text" name="Answer1" value='<?php echo $obj["Answer1"]; ?>' /></td>
<td class="answer">
<input type="text" name="Answer2" value='<?php echo $obj["Answer2"]; ?>' /></td>
<td class="answer">
<input type="text" name="Answer3" value='<?php echo $obj["Answer3"]; ?>' /></td>
<td class="answer">
<input type="text" name="Answer4" value='<?php echo $obj["Answer4"]; ?>' /></td>
My update button code :
if(isset($_POST["update_question"]))
{
$Question_Id=$_POST["update_question"];
$Question_Name=$_POST["Question_Name"];
$Answer1=$_POST["Answer1"];
$Answer2=$_POST["Answer2"];
$Answer3=$_POST["Answer3"];
$Answer3=$_POST["Answer4"];
$update_question="UPDATE `tblquestions` SET `Question_Name`='".$Question_Name."', `Answer1`='".$Answer1."', `Answer2`='".$Answer2."', `Answer3`='".$Answer3."', `Answer4`='".$Answer4."',`ModifiedDate`=NOW() WHERE `Question_Id`='".$Question_Id."'";
$update_result=mysqli_query($con,$update_question);
if($update_result)
{
echo "<script> window.location.href='question.php?msg=sucmsg';</script>";
}
else
{
echo "<script> window.location.href='question.php?msg=errmsg';</script>";
}
}
<button type="submit" name="update_question" class="button" value="<?php echo $obj["update_question"]; ?>">Update</button>
When i enter all the field value , and when i press nothing update in my database.Thanks in advance !

Answer 1

You miss these fields in the form:
<input type="hidden" name="Question_Id" value='<?php echo $obj["Question_Id"]; ?>' /></td>
//just to set any value inside to update_question:
<input type="hidden" name="update_question" value='1' /></td>
Change also the button this way:
<input type="submit" class="button">Update</input>
Then in the script:
if(isset($_POST["update_question"]))
{
$Question_Id=$_POST["Question_Id"];
...
}

Answer 2

There's no update_question column in your table, that's the name of the submit button. The column name is Question_Id, so you should use $obj['Question_Id'] instead of $obj['update_question'].