filter_input_array() function in PHP

The filter_input_array() function gets names of external variables and filters them optionally.

Syntax

filter_input_array(type, arraydefine, add_empty)

Parameters

• type − There are five types of inputs to check i.e. INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV.

• arraydefine − It specifies an array of filter arguments. It is optional.

• add_empty − If value is True, it adds missing keys as NULL to the return value.

Return

The filter_input_array() function returns an array containing the values of the variables on success, or false on failure.

Example

The following is an example that use the filter_input_array() function to filter POST variables stname (student name), stmarks (student marks), stemail (student email)

<?php
   $filters = array (
      "stname" => array (
         "filter"=>FILTER_CALLBACK,
         "flags"=>FILTER_FORCE_ARRAY,
         "options"=>"ucwords"
      ),
      "stmarks" => array (
         "filter"=>FILTER_VALIDATE_INT,
         "options"=>array (
            "min_range"=>1,
            "max_range"=>100
         )
      ),
      "stemail"=> FILTER_VALIDATE_EMAIL,
   );
   print_r(filter_input_array(INPUT_POST, $filters));
?>

The following is the output.

Array (
   [stname] => Jack
   [stmarks] => 95
   [stemail] => [email protected]
)