PHP 5 number_format() not returning exception message in local but it returns in production

Question

I have this PHP snippet below in a PHP 5 legacy project environment(local and production):

<?php

ini_set('display_errors', 'on');
error_reporting(E_ALL);
error_reporting(-1);
ini_set('error_reporting', E_ALL);

try {
    number_format("");
 } catch (\Exception $e) {
     throw new Exception($e->getMessage());
 }

?>

I know that this is a problem since number_format expects float or double. However it does not trigger the exception in localhost but it does in the production.

The actual message is Warning: number_format() expects parameter 1 to be double, string given in /path-to-file.php

I also tried changing ini_set('display_errors', 'on'); to ini_set('display_errors', 1); and error_reporting(E_ALL); to error_reporting(E_ALL | E_STRICT); but it does not return the expected exception.

I also tried removing the try/catch and just use the number_format as is just so that exception error will popup the exception error did not display.

Also tried to add the display_errors = on in php.ini same result.