Category Hierarchy (PHP/MySQL)

Question

I am trying to get my all categories and sub-categories from MySQL database in a hierarchy:

My result should be like that (just example):

Answer 1

Try the following code

//connect to mysql and select db

$conn = mysqli_connect('localhost', 'user', 'password','database');

if( !empty($conn->connect_errno)) die("Error " . mysqli_error($conn));

//call the recursive function to print category listing
category_tree(0);

//Recursive php function
function category_tree($catid){
global $conn;

$sql = "select * from category where parent_id ='".$catid."'";
$result = $conn->query($sql);

while($row = mysqli_fetch_object($result)):
$i = 0;
if ($i == 0) echo '
';
 echo '
' . $row->cat_name;
 category_tree($row->id);
 echo '
';
$i++;
 if ($i > 0) echo '
';
endwhile;
}
//close the connection
mysqli_close($conn);
?>

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