filter_input_array

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

filter_input_array — Obtem variáveis externas e opcionalmente as filtra

Descrição

filter_input_array(int $type, mixed $definition = ?): mixed

Esta função é útil para receber muitos valores sem repetidamente chamar a função filter_input().

Parâmetros

type

Um dos INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, INPUT_ENV, INPUT_SESSION, ou INPUT_REQUEST.

definition

Um definindo os argumentos. Uma chave válida é um string contendo o nome da variável e um valor válido é um tipo filtro, ou um array opcionalmente especificando o filtro, flags e opções. Se o valor é um array, chaves válidas são filter que especifica o tipo de filtro, flags que especifica uma flag aplica ao filtro, e options que especifica uma opção para aplicar ao filtro. Veja os exemplos abaixo para entender melhor.

Este parâmetro pode ser também um inteiro indicando uma constante da filter. Então todos valores na array de entrada serão filtradas por este filtro.

Valor Retornado

Um array contendo os valores das variáveis requisitads em caso de sucesso, ou false em falha. Um array de valores será false se o filtro falhar, ou null se a variável não é definida. Ou se a flag FILTER_NULL_ON_FAILURE é usada, é retornado false se a variável não é definida e null se o filtro falhar.

Exemplos

Exemplo #1 Um exemplo da filter_input_array()

<?php
error_reporting(E_ALL | E_STRICT);
/* data actually came from POST
$_POST = array(
    'product_id'    => 'libgd<script>',
    'component'     => '10',
    'versions'      => '2.0.33',
    'testscalar'    => array('2', '23', '10', '12'),
    'testarray'     => '2',
);
*/

$args = array(
    'product_id'   => FILTER_SANITIZE_ENCODED,
    'component'    => array('filter'    => FILTER_VALIDATE_INT,
                            'flags'     => FILTER_REQUIRE_ARRAY,
                            'options'   => array('min_range' => 1, 'max_range' => 10)
                           ),
    'versions'     => FILTER_SANITIZE_ENCODED,
    'doesnotexist' => FILTER_VALIDATE_INT,
    'testscalar'   => array(
                            'filter' => FILTER_VALIDATE_INT,
                            'flags'  => FILTER_REQUIRE_SCALAR,
                           ),
    'testarray'    => array(
                            'filter' => FILTER_VALIDATE_INT,
                            'flags'  => FILTER_REQUIRE_ARRAY,
                           )

);

$myinputs = filter_input_array(INPUT_POST, $args);

var_dump($myinputs);
echo "\n";
?>

O exemplo acima produzirá:

array(6) {
  ["product_id"]=>
  array(1) {
    [0]=>
    string(17) "libgd%3Cscript%3E"
  }
  ["component"]=>
  array(1) {
    [0]=>
    int(10)
  }
  ["versions"]=>
  array(1) {
    [0]=>
    string(6) "2.0.33"
  }
  ["doesnotexist"]=>
  NULL
  ["testscalar"]=>
  bool(false)
  ["testarray"]=>
  array(1) {
    [0]=>
    int(2)
  }
}

Veja Também

filter_input() - Obtem a específica variável externa pelo nome e opcionalmente a filtra
filter_var_array() - Obtêm múltiplas variáveis e opcionalmente as filtra

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User Contributed Notes 9 notes

down

sdupuis at blax dot ca ¶

9 years ago

Note that although you can provide a default filter for the entire input array there is no way to provide a flag for that filter without building the entire definition array yourself.

So here is a small function that can alleviate this hassle!

<?php
function filter_input_array_with_default_flags($type, $filter, $flags, $add_empty = true) {
    $loopThrough = array();
    switch ($type) {
        case INPUT_GET : $loopThrough = $_GET; break;
        case INPUT_POST : $loopThrough = $_POST; break;
        case INPUT_COOKIE : $loopThrough = $_COOKIE; break;
        case INPUT_SERVER : $loopThrough = $_SERVER; break;
        case INPUT_ENV : $loopThrough = $_ENV; break;
    }
   
    $args = array();
    foreach ($loopThrough as $key=>$value) {
        $args[$key] = array('filter'=>$filter, 'flags'=>$flags);
    }
    
    return filter_input_array($type, $args, $add_empty);
}
?>

down

CertaiN ¶

9 years ago

[New Version]
This function is very useful for filtering complicated array structure.
Also, Some integer bitmasks and invalid UTF-8 sequence detection are available.

Code:
<?php
/**
 * @param  integer $type    Constant like INPUT_XXX.
 * @param  array   $default Default structure of the specified super global var.
 *                          Following bitmasks are available:
 *  + FILTER_STRUCT_FORCE_ARRAY - Force 1 dimensional array.
 *  + FILTER_STRUCT_TRIM        - Trim by ASCII control chars.
 *  + FILTER_STRUCT_FULL_TRIM   - Trim by ASCII control chars,
 *                                full-width and no-break space.
 * @return array            The value of the filtered super global var.
 */
define('FILTER_STRUCT_FORCE_ARRAY', 1);
define('FILTER_STRUCT_TRIM', 2);
define('FILTER_STRUCT_FULL_TRIM', 4);
function filter_struct_utf8($type, array $default) {
    static $func = __FUNCTION__;
    static $trim = "[\\x0-\x20\x7f]";
    static $ftrim = "[\\x0-\x20\x7f\xc2\xa0\xe3\x80\x80]";
    static $recursive_static = false;
    if (!$recursive = $recursive_static) {
        $types = array(
            INPUT_GET => $_GET,
            INPUT_POST => $_POST,
            INPUT_COOKIE => $_COOKIE,
            INPUT_REQUEST => $_REQUEST,
        );
        if (!isset($types[(int)$type])) {
            throw new LogicException('unknown super global var type');
        }
        $var = $types[(int)$type];
        $recursive_static = true;
    } else {
        $var = $type;
    }
    $ret = array();
    foreach ($default as $key => $value) {
        if ($is_int = is_int($value)) {
            if (!($value | (
                FILTER_STRUCT_FORCE_ARRAY |
                FILTER_STRUCT_FULL_TRIM | 
                FILTER_STRUCT_TRIM
            ))) {
                $recursive_static = false;
                throw new LogicException('unknown bitmask');
            }
            if ($value & FILTER_STRUCT_FORCE_ARRAY) {
                $tmp = array();
                if (isset($var[$key])) {
                    foreach ((array)$var[$key] as $k => $v) {
                        if (!preg_match('//u', $k)){
                            continue;
                        }
                        $value &= FILTER_STRUCT_FULL_TRIM | FILTER_STRUCT_TRIM;
                        $tmp += array($k => $value ? $value : '');
                    }
                }
                $value = $tmp;
            }
        }
        if ($isset = isset($var[$key]) and is_array($value)) {
            $ret[$key] = $func($var[$key], $value);
        } elseif (!$isset || is_array($var[$key])) {
            $ret[$key] = null;
        } elseif ($is_int && $value & FILTER_STRUCT_FULL_TRIM) {
            $ret[$key] = preg_replace("/\A{$ftrim}++|{$ftrim}++\z/u", '', $var[$key]);
        } elseif ($is_int && $value & FILTER_STRUCT_TRIM) {
            $ret[$key] = preg_replace("/\A{$trim}++|{$trim}++\z/u", '', $var[$key]);
        } else {
            $ret[$key] = preg_replace('//u', '', $var[$key]);
        }
        if ($ret[$key] === null) {
            $ret[$key] = $is_int ? '' : $value;
        }
    }
    if (!$recursive) {
        $recursive_static = false;
    }
    return $ret;
}
?>

down

CertaiN ¶

10 years ago

This function is very useful for filtering complicated array structure.

Code:
<?php
function filter_request($var, $default_structure) {

    $ret = array();

    foreach ($default_structure as $key => $value) {
        if (!isset($var[$key])) {
            $ret[$key] = $value;
        } elseif (is_array($value)) {
            $ret[$key] = filter_request($var[$key], $value);
        } elseif (is_array($var[$key])) {
            $ret[$key] = $value;
        } else {
            $ret[$key] = $var[$key];
        }
    }

    return $ret;

}
?>

Sample Usage:
<?php
$_GET['a']['wrong_structure'] = 'foo';
$_GET['b']['c'] = 'CORRECT';
$_GET['b']['d']['wrong_structure'] = 'bar';
$_GET['unneeded_item'] = 'baz';

var_dump(filter_request($_GET, array(
    'a' => 'DEFAULT',
    'b' => array(
        'c' => 'DEFAULT',
        'd' => 'DEFAULT',
    ),
)));
?>

Sample Result:
array(2) {
  ["a"]=>
  string(21) "DEFAULT"
  ["b"]=>
  array(2) {
    ["c"]=>
    string(12) "CORRECT"
    ["d"]=>
    string(21) "DEFAULT"
  }
}

down

Anonymous ¶

13 years ago

Beware: if none of the arguments is set, this function returns NULL, not an array of NULL values.

/* No POST vars set in request
$_POST = array();
*/

$args = array('some_post_var' => FILTER_VALIDATE_INT);
$myinputs = filter_input_array(INPUT_POST, $args);
var_dump($myinputs);

Expected Output: array(1) { ["some_post_var"]=> NULL } 

Actual Output: NULL

down

CertaiN ¶

9 years ago

[New Version]

Example Usage:
<?php
$_GET['A']['a'] = '  CORRECT(including some spaces)    ';
$_GET['A']['b'] = '  CORRECT(including some spaces)    ';
$_GET['A']['c'] = "Invalid UTF-8 sequence: \xe3\xe3\xe3";
$_GET['A']['d']['invalid_structure'] = 'INVALID';

$_GET['B']['a'] = '  CORRECT(including some spaces)    ';
$_GET['B']['b'] = "Invalid UTF-8 sequence: \xe3\xe3\xe3";
$_GET['B']['c']['invalid_structure'] = 'INVALID';
$_GET['B']["Invalid UTF-8 sequence: \xe3\xe3\xe3"] = 'INVALID';

$_GET['C']['a'] = '  CORRECT(including some spaces)    ';
$_GET['C']['b'] = "Invalid UTF-8 sequence: \xe3\xe3\xe3";
$_GET['C']['c']['invalid_structure'] = 'INVALID';
$_GET['C']["Invalid UTF-8 sequence: \xe3\xe3\xe3"] = 'INVALID';

$_GET['unneeded_item'] = 'UNNEEDED';

var_dump(filter_struct_utf8(INPUT_GET, array(
    'A' => array(
        'a' => '',
        'b' => FILTER_STRUCT_TRIM,
        'c' => '',
        'd' => '',
    ),
    'B' => FILTER_STRUCT_FORCE_ARRAY,
    'C' => FILTER_STRUCT_FORCE_ARRAY | FILTER_STRUCT_TRIM,
)));
?>

Example Result:
array(3) {
  ["A"]=>
  array(4) {
    ["a"]=>
    string(36) "  CORRECT(including some spaces)    "
    ["b"]=>
    string(30) "CORRECT(including some spaces)"
    ["c"]=>
    string(0) ""
    ["d"]=>
    string(0) ""
  }
  ["B"]=>
  array(3) {
    ["a"]=>
    string(36) "  CORRECT(including some spaces)    "
    ["b"]=>
    string(0) ""
    ["c"]=>
    string(0) ""
  }
  ["C"]=>
  array(3) {
    ["a"]=>
    string(30) "CORRECT(including some spaces)"
    ["b"]=>
    string(0) ""
    ["c"]=>
    string(0) ""
  }
}

down

Kevin ¶

15 years ago

Looks like filter_input_array isn't aware of changes to the input arrays that were made before calling filter_input_array. Instead, it always looks at the originally submitted input arrays.

So this will not work:

$_POST['my_float_field'] = str_replace(',','.',$_POST['my_float_field']);
$args = array('my_float_field',FILTER_VALIDATE_FLOAT);
$result = filter_input_array(INPUT_POST, $args);

down

ville at N0SPAM dot zydo dot com ¶

13 years ago

While filtering input arrays, be careful of what flags you set besides FILTER_REQUIRE_ARRAY. For example, setting the flags like so:



<?php

$filter = array(

'myInputArr' => array('filter' => FILTER_SANITIZE_STRING,

                      'flags' => array('FILTER_FLAG_STRIP_LOW', 'FILTER_REQUIRE_ARRAY'))

);



$form_inputs = filter_input_array(INPUT_POST, $filter);

?>



.. will result in a blank $form_inputs['myInputArr'] regardless of what $_POST['myInputArr'] contains.

down

kibblewhite at live dot com ¶

14 years ago

If you are trying to handling multiple form inputs with same name, then you must assign the `'flags'  => FILTER_REQUIRE_ARRAY` to the definitions entry.

Example, you have a html form as such:
<form>
 <input name="t1[]" value="Some string One" />
 <input name="t1[]" value="Another String Two" />
</form>

Your definitions array will look a little like this:
$args = array(
  't1'    => array(
      'name' => 't1',
      'filter' => FILTER_SANITIZE_STRING,
      'flags'  => FILTER_REQUIRE_ARRAY)
);

down

cornelyu85 at yahoo dot com ¶

1 month ago

Here's an extended function that allows you to keep also the unfiltered items/args from the request, while you also apply validation to some of them:

<?php

$validationRules = [
    'foo' => [
        'filter' => FILTER_VALIDATE_REGEXP,
        'options' => ['regexp' => '/^(bar|baz)$/i']
    ]
];

$request = filter_input_array_keep_unfiltered_args(INPUT_POST, $validationRules);

var_dump($request);

function filter_input_array_keep_unfiltered_args($type, $filters, $addEmpty = true)
{
    $rawRequest = filter_input_array($type);

    $validationRules = [];
    foreach ($rawRequest as $key => $value) {
        $validationRules[$key] = isset($filters[$key]) ? $filters[$key] : ['filter' => FILTER_DEFAULT];
    }

    return filter_input_array($type, $validationRules, $addEmpty);
}

?>

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