Fixing the "invalid argument supplied for foreach()" PHP error

<?php 
function getList () {
  // Assume some error occurs here and instead of
  // a list/array, a boolean FALSE is returned.
  return false;
}
// Get the array from a function call.
$myList = getList();
//Loop through the $myList array.
foreach($myList as $arrayItem)
{
  //Do something.
}
?>

<?php 
function getList () {
  // Assume some error occurs here and instead of
  // a list/array, a boolean FALSE is returned.
  return false;
}
// Get the array from a function call.
$myList = getList();
// Check if $myList is indeed an array or an object.
if (is_array($myList) || is_object($myList))
{
  // If yes, then foreach() will iterate over it.
  foreach($myList as $arrayItem){
      //Do something.
  }
}
else // If $myList was not an array, then this block is executed. 
{
  echo "Unfortunately, an error occured.";
}
?>