filter_var

Function • Params and return types changed in PHP 8.0

Filters a variable with a specified filter.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

filter_var Function synopsis

filter_var(
    mixed $value,
    int $filter = FILTER_DEFAULT,
    array|int $options = 0
  ): mixed

Parameters

$value

Typemixed

$filter

OptionalTypeintDefault valueFILTER_DEFAULT

$options

OptionalTypearray|intDefault value0

Return value

Typemixed

Changes to the filter_var Function

PHP 8.0

  • Return type added: mixed
  • Parameter name of parameter #1 changed: $variable to $value
  • Parameter type added for parameter #1 ($value): mixed
  • Parameter type added for parameter #2 ($filter): int
  • Parameter default value added for position #2 ($filter): FILTER_DEFAULT
  • Parameter type added for parameter #3 ($options): array|int
  • Parameter default value added for position #3 ($options): 0
  filter_var(
-     $variable,
+     mixed $value,
-     $filter,
+     int $filter = FILTER_DEFAULT,
-     $options
+     array|int $options = 0
-   )
+   ): mixed

filter_var Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes