EDIT DATA in TABLE using php - php

Question

**I want to edit data in my table using modal but i can only call ID=1 i cant edit the others and also i need to refresh my web before i can see the changes?
// my update code
<?php
$id= "1";
$mysqli = new mysqli('127.0.0.1','root','','books');
$query = $mysqli->query("select * from bookrecords where ID='$id' ");
$row = $query->fetch_assoc();
if(isset($_POST['update'])) {
$id = $_POST['id'];
$nm = $_POST['nm'];
$is = $_POST['is'];
$pb = $_POST['pb'];
$au = $_POST['au'];
$result = $mysqli->query("UPDATE bookrecords set BookName='$nm', ISBN='$is', Publisher='$pb', Author='$au' where ID='$id'");
if($result){
?>
<div class="alert-success" role="alert">
<button type="button" class="close" data-dismiss="alert" aria-label="close"><span aria-hidden="true">&times</span></button>
<strong>Success!</strong> your data has been updated.
</div>
<?php
} else{
?>
<div class="alert-failed" role="alert">
<button type="button" class="close" data-dismiss="alert" aria-label="close"><span aria-hidden="true">&times</span></button>
<strong>Failed!</strong> Error updating. Try Again!
</div>
<?php
}
}
?>
** and this is my Modal form....
<div class="form-group">
<label for="id">ID:</label>
<input type="text" class="form-control" id="id" name="id" value="<?php echo $row['ID']?>" readonly>
</div>
<div class="form-group">
<label for="nm">BookName:</label>
<input type="text" class="form-control" id="nm" name="nm" value="<?php echo $row['BookName']?>">
</div>
<div class="form-group">
<label for="is">ISBN:</label>
<input type="text" class="form-control" id="is" name="is" value="<?php echo $row['ISBN']?>">
</div>
<div class="form-group">
<label for="pb">Publisher:</label>
<input type="text" class="form-control" id="pb" name="pb" value="<?php echo $row['Publisher']?>">
</div>
<div class="form-group">
<label for="au">Author:</label>
<input type="text" class="form-control" id="au" name="au" value="<?php echo $row['Author']?>">
</div>
<button type="submit" name="update" class="btn-primary">Update</button>
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</form>
</div>
<div class="modal-footer">
</div>
</div>
**so how can i call any of my item/data in table? Please help me.

Answer 1

Your HTML form must have a hidden field with the id of book record, which will be send to the PHP script when pressing the "Update" button. The hidden field should look like this:
<input type="hidden" name="bookrecordId" value="ID_OF_BOOKRECORD_HERE" />
You can access the value of the transfered id with $_POST['bookrecordId'] in your receiving PHP script. Use it to build one or two prepared statements which will check if the row exists and then run an UPDATE query to update the values.