index.php
<html>
<body>
<?php
$conn=mysqli_connect('localhost','ksumanadhikari','welcome','task');
$sql='select * from data';
$result=mysqli_query($conn,$sql);
?>
<form action="submit.php" method="post">
<input type="number" name="num">
<button name="submit">Submit</button>
</form>
<?php
if(mysqli_num_rows($result)>0){
?>
<table border="1">
<tr>
<th>sn</th>
<th>num</th>
</tr>
<?php
while($row=mysqli_fetch_assoc($result)) {
?>
<tr>
<td><?php echo $row['sn'];?></td>
<td><?php echo $row['num'];?></td>
<td><a href='edit.php?sn=<?php echo $row['sn'];?>'>Edit</a></td>
<td><a href='delete.php?sn=<?php echo $row['sn'];?>'>delete</a></td>
</tr>
<?php } ?>
</table>
<?php }else {
echo "no table found";
mysqli_close($conn);
} ?>
</body>
</html>
<?php
$conn=mysqli_connect('localhost','ksumanadhikari','welcome','task') or die("margaya madarchood! la la lalalalalalala la la");
$num=$_POST['num'];
$sql="insert into data(num) values('$num')";
mysqli_query($conn,$sql);
header("location: index.php");
exit();
?>
edit.php
<?php
$conn=mysqli_connect('localhost','ksumanadhikari','welcome','task') or die("connection failed");
$sn=$_GET['sn'];
$sql="select * from data where sn='$sn'";
$result=mysqli_query($conn,$sql);
if(mysqli_num_rows($result)>0){
while($row=mysqli_fetch_assoc($result)) {
?>
<form action="update.php" method="post">
SN <input type="number" name="sn" value="<?php echo $row['sn']; ?>" />
Change Number <input type="number" name="num" value="<?php echo $row['num']; ?>" />
<input type="submit" value="Update Data">
</form>
<?php } } ?>
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