Not able to retrieve results from database in php/mysql - php

Question

I am using simple code to retrieve data from database table but not getting result it always shows "No Result found".
Table Structure
rollno Varchar(50) Primary Key,
name Varchar(100),
fname Varchar(100),
mname Varchar(100),
course Varchar(100),
duration Varchar(100),
address Varchar(100),
image blob.
HTML FORM CODE
<form name="input" action="q.php" target="display" method="post" >
Roll No: <input type="text" name="name">
<input type="submit" name="submit" value="Submit">
</form>
PHP CODE
<?php
if (isset($_POST['name'])) {
$con=mysqli_connect("mysql.1freehosting.com","u890130056_certi","samsungk2","u890130056_certi");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$name = htmlspecialchars($_POST['rollno']);
{
$result = mysqli_query($con,"SELECT * FROM certificate where rollno ='$name'");
if(mysqli_num_rows($result)>0){
while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row['rollno'] . "</td>";
echo "<td>" . $row['course'] . "</td>";
echo "<td>" . $row['duration'] . "</td>";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['fname'] . "</td>";
echo "<td>" . $row['mname'] . "</td>";
echo "<td>" . $row['address'] . "</td>";
echo "<td>";?><img src="<?php echo $row["image"]; ?> " height="100" width="100"> <?php echo "</td>";
echo "</tr>";
}
}
else
{
echo "<tr><td colspan='4'> No Data Found , Please check your registration no. or contact the institute for clarification. ".$line.'</td></tr>';
}
mysqli_close($con);
}}
?>

Answer 1

name = htmlspecialchars($_POST['rollno']);
where are you getting this 'rollno??
i dont get why are you saving the result by posting['rollno'] because the name of your feild is 'name'.
change this line
$name = htmlspecialchars($_POST['rollno']);
to
$name = htmlspecialchars($_POST['name']);