2 Test array_key_exists() function : usage variations - floats and casting to ints
5 /* Prototype : bool array_key_exists(mixed $key, array $search)
6 * Description: Checks if the given key or index exists in the array
7 * Source code: ext/standard/array.c
8 * Alias to functions: key_exists
12 * Pass floats as $key argument, then cast float values
13 * to integers and pass as $key argument
16 echo "*** Testing array_key_exists() : usage variations ***\n";
18 $keys = array(1.2345678900E-10, 1.00000000000001, 1.99999999999999);
20 $search = array ('zero', 'one', 'two');
23 foreach($keys as $key) {
24 echo "\n-- Iteration $iterator --\n";
25 echo "Pass float as \$key:\n";
27 var_dump(array_key_exists($key, $search));
28 } catch (TypeError $exception) {
29 echo $exception->getMessage() . "\n";
31 echo "Cast float to int:\n";
32 var_dump(array_key_exists((int)$key, $search));
38 *** Testing array_key_exists() : usage variations ***