I noticed that :
PHP ignored arguments type when using array_walk() even if there was
declare(strict_types=1) .
See this code as an example ...
<?php
declare(strict_types=1);
$fruits = array("butter" => 5.3, "meat" => 7, "banana" => 3);
function test_print(int $item2, $key) {
echo "$key: $item2<br />\n";
}
array_walk($fruits, 'test_print');
?>
The output is :
butter: 5
meat: 7
banana: 3
whilst the expecting output is :
Fatal error: Uncaught TypeError: Argument 1 passed to test_print() must be of the type integer
because "butter" => 5.3 is float
I asked someone about it and they said "this was caused by the fact that callbacks called from internal code will always use weak type". But I tried to do some tests and this behavior is not an issue when using call_user_func().
