<?php
    $host='127.0.0.1';
    $user='root';
    $pass='1234';
    $db='practice';


   if($link= mysqli_connect($host,$user,$pass,$db))
   {
    echo "connected successfully";
   }



   ?>

<?php
   include('db_connection.php');
   $table="studentinfo";

   $query =" SELECT 'name' from $table ";
   $result=mysqli_query($link,$query);
   if(false===$result)
   {
    printf("error: %sn",mysqli_error($link));
   }

  ?>

connected successfullyerror: Table 'practice.studentinfo' doesn't exist