"The argument should be an array" is useless

[vitalyb]

I am boggled by this warning, should I do is_array everytime I use a function that accepts an array (foreach, usort etc etc etc)??

I am regular from C++ (STL) that is the array is empty it will just won't do the for loop and get over it.

So what do I do? Check for is_array everytime?

[drawmack]

if you have code like this

<?
$my_array = some_function_that_returns_an_array_on_success();

foreach($my_array as $stuff) {
  //process array elements
} //end foreach
?>

If on failure it does not return an array then you should check is_array before calling foreach.