legomolina legomolina - 9 months ago 60
JSON Question

Sanitize JSON with php

I always use filter_var($var, FILTER, FLAG); when I get data from $_GET, $_POST and so on, but now this data is a JSON string but I didn't find any filter to sanitize JSON. Anyone know how to implement this filter?

PHP filter_var():



Parse the JSON first into a PHP array and then filter each value in the array as you do with regular request content, you could map the JSON keys to schematic filters and flags/options e.g.

$filters = array(
$options = array(
    //... and so on
$inputs = json_decode($your_json_data);
$filtered = array();
foreach($inputs as $key=>$value) {
     $filtered[$key] = filter_var($value, $filters[$key], $options[$key]);