Parse error: syntax error, unexpected ',', expecting variable (T_VARIABLE)

I've got error on defined-function and from error_reporting(E_ALL);

There are errors Parse error: syntax error, unexpected ',', expecting variable (T_VARIABLE) in C:\xampp\htdocs\bs4\func.php on line 4

Here is my code

<?php
error_reporting(E_ALL);
require_once "condb.php";
function noproblem(time,suggest,phone,eat,problem){ // Here is line 4

  $sql="insert into data(time,suggest,phone,eat,problem) values(?,?,?,?,?)";
  $stmt=$cn->prepare($sql);
  $stmt->bindParam("1",time);
  $stmt->bindParam("2",suggest);
  $stmt->bindParam("3",phone);
  $stmt->bindParam("4",eat);
  $stmt->bindParam("5",problem);

  try {
    $stmt->execute();
    echo "ok!";
  } catch (Exception $e) {
    echo $e->getTraceAsString();
  }
}
?>

In PHP variables have to start with a $:

function noproblem($time,$suggest,$phone,$eat,$problem){

The same applies to all other variables in the example.