PHP FILTER_SANITIZE_NUMBER_INT filter
Definition and Usage
FILTER_SANITIZE_NUMBER_INT digital filter remove all illegal characters.
The filter allows all digital and + -
- Name: "number_int"
- ID-number: 519
Examples
<?php
$number="5-2+3pp";
var_dump(filter_var($number, FILTER_SANITIZE_NUMBER_INT));
?>
$number="5-2+3pp";
var_dump(filter_var($number, FILTER_SANITIZE_NUMBER_INT));
?>
Output code is as follows:
string(5) "5-2+3"
Complete PHP Filter Reference