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Bug #70263 filter_input_array 'add_empty' fails if query string absent
Submitted: 2015-08-13 22:24 UTC Modified: 2020-04-11 13:50 UTC
Avg. Score:4.7 ± 0.5
Reproduced:3 of 3 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: mike dot whipps at littlevale dot co dot uk Assigned: cmb (profile)
Status: Not a bug Package: Filter related
PHP Version: 5.5.28 OS: Linux Fedora 20
Private report: No CVE-ID: None
 [2015-08-13 22:24 UTC] mike dot whipps at littlevale dot co dot uk
filter_input_array(INPUT_GET, $filters, true) does not add empty fields to the output array if the query string is absent. It does add them correctly if even one parameter appears.

Note that filter_var_array($_GET, $filters, true) does add the empty fields correctly.

Test script:
$getFilters = [

    echo '$_GET: <br>';

    $req = filter_input_array(INPUT_GET, $getFilters, true);
    echo '<hr>$req:<br>';

    echo '<hr>$reqGet<br>';
    $reqGet = filter_var_array($_GET, $getFilters, true);

Actual result:
Execute the above script with no query string gives this result:


array (size=0)




array (size=2)
  'id' => null
  'name' => null


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 [2019-11-01 13:22 UTC] vorbox+php at pp dot me
confirmed PHP7.4.0RC5 Windows 7 32.
 [2020-04-11 13:50 UTC]
-Status: Open +Status: Not a bug -Assigned To: +Assigned To: cmb
 [2020-04-11 13:50 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at

From the manual[1]:

| If the input array designated by type is not populated, the
| function returns NULL […]

[1] <>
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