Get or set a whitelist variable
Whitelist variables are used by modules and templates and assumed to be sanitized. Only place variables in the whitelist that you have already sanitized.
The whitelist is a list of variables specifically set by the application as sanitized for use elsewhere in the application. This whitelist is not specifically used by ProcessWire unless you populate it from your templates or the API. When populated, it is used by the MarkupPagerNav module (for instance) to ensure that sanitizedd query string (GET) variables are maintained across paginations.
// Retrieve a GET variable, sanitize/validate it, and populate to whitelist $limit = (int) $input->get('limit'); if($limit < 10 || $limit > 100) $limit = 25; // validate $input->whitelist('limit', $limit);
// Retrieve a variable from the whitelist $limit = $input->whitelist('limit');
// basic usage $mixed = $input->whitelist(); // usage with all arguments $mixed = $input->whitelist(string $key = '', mixed $value = null);
Whitelist variable name that you want to get or set.
Value you want to set (if setting a value). See explanation for the $key param.
Returns whitelist variable value if getting a value (null if it doesn't exist).
API reference based on ProcessWire core version 3.0.130