PHP MYSQL Record not added [closed] - php

Question

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 6 days ago.
Improve this question
i am creating simple registation using php mysql.when i click the save button record need to add into the database table.but couldn't i didn't get any error but record not addedd.
php isset method is not working.
Form Design
<form action="add.php" method="post">
<label>Name</label></br>
<input type="text" name="name" id="name" class="form-control"></br>
<label>Address</label></br>
<input type="text" name="address" id="address" class="form-control"></br>
<label>Mobile</label></br>
<input type="text" name="mobile" id="mobile" class="form-control"></br>
<input type="submit" value="Save" class="btn btn-success"></br>
</form>
Php Code
<?php
$conn = mysqli_connect("localhost","root","");
$db = mysqli_select_db($conn,"bcrud");
$errors = "";
if(isset($_POST['submit'])) {
$name = $_POST['name'];
$address = $_POST['address'];
$phone = $_POST['mobile'];
if(! $errors)
{
if(mysqli_errno($conn))
{
echo "Errr " , mysqli_errno($conn);
}
$sql = "insert into register(name,address,mobile)values('$name','$address','$phone')";
if(mysqli_query($conn,$sql))
{
echo "addedd";
}
else
{
echo "Errr " , mysqli_error($conn);
}
}
}
?>