I'm creating a small website using PHP, which is generally a site for showcasing the hospital, and I modified the code given in this example: https://www.w3schools.com/php/php_mysql_select.asp
<?php
    $query = "SELECT * FROM emp WHERE type = 'woman' "; 
    $result = mysqli_query($db, $query);
    if(mysqli_num_rows($result) > 0)
    { 
        while($row = mysqli_fetch_array($result)) 
        {
            $cat = $row["cat"] . ','; 
            echo $cat;                
           ////<---- echo on while (Loop)
         }
     }
The expected output would be as follows:
Output: 35,36
But I changed the code with the link above and it is as follows:
if(mysqli_num_rows($result) > 0)
{ 
  while($row = mysqli_fetch_array($result)) 
  {
    $cat = $row["cat"] . ','; 
  }
  echo $cat;              
  ///// <---- echo Out of While (Loop)
} 
Output: 35
My expecting output would be 35, 36 outside of "while" using "echo".
What code do you recommend to output "35,36" the same code above?
 
     
    