filter_input_array

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

filter_input_array — Obtiene variables externas y opcionalmente las filtra

Descripción

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

Esta función es útil para recuperar muchos valores sin necesidad de hacer repetidas llamadas a filter_input().

Parámetros

type

Una de las siguientes: INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER o INPUT_ENV.

definition

Un array definiendo los argumentos. Una clave válida será aquella que contiene un string con el nombre de una variable y un valor válido aquel que o bien es un tipo filter type o un array especificando opcionalmente el filtro, flags y opciones. Si el valor es un array, las claves válidas serán: filter que especifica el tipo filter type, flags que define cualquier flag que deba aplicarse a los filtros, y options que establece cualquier opción que se deba aplicar al filtro. Para entender mejor su funcionamiento, vea el ejemplo inferior.

Este parámetro puede ser también un entero que indique una constante de filtro. Entonces todos los valores en el array de entrada son filtrados por ese filtro.

add_empty

Añade claves faltantes como null al valor devuelto.

Valores devueltos

En caso de éxito, un array con los valores de las variables que se han pedido o false en caso de fallo. Un valor del array puede ser false si el filtro falla o null si la variable no está creada. O, si se usa el flag FILTER_NULL_ON_FAILURE y la variable no está definida retorna false y null si el filtro falla.

Ejemplos

Ejemplo #1 Un ejemplo con filter_input_array()

<?php
error_reporting(E_ALL | E_STRICT);
/* Los datos vienen realmente por POST
$_POST = array(
    'id_producto'    => 'libgd<script>',
    'componente'     => '10',
    'version'      => '2.0.33',
    'test_escalar'    => array('2', '23', '10', '12'),
    'test_array'     => '2',
);
*/

$args = array(
    'id_producto'   => FILTER_SANITIZE_ENCODED,
    'componente'    => array('filter'    => FILTER_VALIDATE_INT,
                            'flags'     => FILTER_REQUIRE_ARRAY, 
                            'options'   => array('min_range' => 1, 'max_range' => 10)
                           ),
    'version'     => FILTER_SANITIZE_ENCODED,
    'no_existe' => FILTER_VALIDATE_INT,
    'test_escalar'   => array(
                            'filter' => FILTER_VALIDATE_INT,
                            'flags'  => FILTER_REQUIRE_SCALAR,
                           ),
    'test_array'    => array(
                            'filter' => FILTER_VALIDATE_INT,
                            'flags'  => FILTER_REQUIRE_ARRAY,
                           )

);

$mis_entradas = filter_input_array(INPUT_POST, $args);

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

El resultado del ejemplo sería:

array(6) {
  ["id_producto"]=>
  array(1) {
    [0]=>
    string(17) "libgd%3Cscript%3E"
  }
  ["componente"]=>
  array(1) {
    [0]=>
    int(10)
  }
  ["version"]=>
  array(1) {
    [0]=>
    string(6) "2.0.33"
  }
  ["no_existe"]=>
  NULL
  ["test_escalar"]=>
  bool(false)
  ["test_array"]=>
  array(1) {
    [0]=>
    int(2)
  }
}

Historial de cambios

Versión	Descripción
5.4.0	Se añadió el parámetro `add_empty`.

Notas

Nota:
No existe la clave REQUEST_TIME en la matriz INPUT_SERVER porque este valor se inserta posteriormente en $_SERVER.

Ver también

filter_input() - Toma una variable externa concreta por su nombre y opcionalmente la filtra
filter_var_array() - Retorna múltiple variables y opcionalmente las filtra
Tipos de filtros

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User Contributed Notes 9 notes

down

sdupuis at blax dot ca ¶

10 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 ¶

10 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 ¶

11 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 ¶

14 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

Kevin ¶

16 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

CertaiN ¶

10 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

ville at N0SPAM dot zydo dot com ¶

14 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 ¶

15 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 year 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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