FILTER_SANITIZE_NUMBER_INT - PHP

FILTER_SANITIZE_NUMBER_INT

Id of this function is 519. By using FILTER_SANITIZE_NUMBER_INT we can remove all chars except digits and + - signs. Here is an example

$str='41!5~6+7'; // Change this value to get different result
$str = filter_var($str,FILTER_SANITIZE_NUMBER_INT);
echo $str;

Output of this is here

4156+7