help.php

<?php

// Information at below: I've explained
// Inside Website:
<?php
error_reporting(1);
require 'includes/Handler.php';

  $api = new Handler();

  $rtn = $_GET['level'];

  if (isset($rtn)) {
          echo "<tr>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['id'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['fullname'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['ic'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['level'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['subject'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['branch'] . "</td>";
          echo "<td>" . $api->returnStudentByLevel($rtn)['payment'] . "</td>";
          echo "</tr>";					        							        		
  }

// Function inside includes/Handler.php
public function returnStudentByLevel($level) {
  $sql = "SELECT * FROM student WHERE level = ?";
  $stmt = mysqli_stmt_init($this->storedSQL);

  if (!mysqli_stmt_prepare($stmt, $sql)) {
    echo "Prepare Failed!";
    exit();			
  } else {
    mysqli_stmt_bind_param($stmt, "s", $level);
    mysqli_stmt_execute($stmt);

    $result = mysqli_stmt_get_result($stmt);

    if ($row = mysqli_fetch_assoc($result)) {	
      $custArray = array("id" => $row['id'], "fullname" => $row['fullname'], "ic" => $row['ic'], "level" => $row['level'], "subject" => $row['subject'], "branch" => $row['branch'], "payment" => $this->checkPaymentStatusForCurrentMonth($row['ic']));
      return $custArray;
    } else {
      $row = array("id" => "?", "fullname" => "No Data", "ic" => "No Data", "level" => "No Data", "subject" => "null", "branch" => "-", "payment" => "No Data");
      return $row;
    }
  }
}

?>

// What have I done?
- I've tried to change to 
`while ($row = mysqli_fetch_assoc($result)) { }`
 and return the $row. Nothing really added or changed. At the time being, I have 5 records in the student table.
  
  // What I want?
  - I want to it to show all records (student) inside the Table