Why do this :
$myarray = array();
$_SESSION['myarray'] = serialize($myarray);
$myarray = unserialize($_SESSION['myarray']);
if ($myarray == null) {
print_r($myarray);
print("<br>no data");
exit;
}
gives this as a result :
Array ( )
no data
How my var can contains an array and be tested TRUE to null ?
Type juggling is responsible. An empty array and null both equal false. Because you use the == comparison operator, type is not compared they are considered equal. If you use the === comparison operator then an empty array is not equal to null as the if statement evaluates to false.
Because of loose comparison that you are using ( == ), $myarray == null is the same as $myarray == [], loose comparison means that only values are compared and both these values are empty. To compare the type as well as the value use strict comparison with ===.
