filter_input_array

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

filter_input_array — Nimmt mehrere Variablen von Außen entgegen und filtert sie optional

Beschreibung

filter_input_array(int $type, array|int $options = FILTER_DEFAULT, bool $add_empty = true): array|false|null

Diese Funktion ist nützlich, um mehrere Werte abzufragen ohne wiederholend filter_input() aufrufen zu müssen.

Parameter-Liste

type

Einer von INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER oder INPUT_ENV.

options

Array dass die Argumente enthält. Ein gültiger Key ist ein string der einen Variablennamen enthält und ein gültiger Wert ist entweder ein Filter oder ein array welches den Filter, seine Flags und Optionen spezifiziert. Wenn der Wert ein Array ist, sind gültige Keys filter der den Filtertyp definiert, flags welches jegliche Flags die den Filter spezifizieren enthält und options welches die Optionen enthält die den Filter beschreiben. Für ein besseres Verständnis sehen Sie sich das Beispiel an.

Der Parameter kann auch ein Integer sein der eine Filterkonstante beschreibt. Dann werden alle Werte des Eingabearrays durch diesen Filter gefiltert.

add_empty

Füge dem Rückgabewert fehlende Keys als null hinzu.

Rückgabewerte

Bei Erfolg wird ein Array zurückgegeben, welches alle Werte der angefragten Variablen enthält. Ist das durch type bezeichnete Eingabearray nicht befüllt, gibt die Funktion null zurück, wenn die das FILTER_NULL_ON_FAILURE Flag nicht angegeben wurde, oder false andernfalls. Bei anderen Fehlern wird false zurückgegeben.

Ein einzelner Array-Wert ist false, wenn das Filtern fehlgeschlagen ist oder null, wenn die Variable nicht gesetzt ist. Wenn das Flag FILTER_NULL_ON_FAILURE benutzt wurde, wird false zurückgegeben, wenn die Variable nicht gesetzt ist und null, wenn das Filtern fehlgeschlagen ist. Ist der Parameter add_empty false, wird kein Arrayelement für nicht gesetzte Variablen hinzugefügt.

Beispiele

Beispiel #1 filter_input_array() Beispiel

<?php

/* data actually came from POST
$_POST = array(
    'product_id' => 'libgd<script>',
    'component'  => array('10'),
    'version'    => '2.0.33',
    'testarray'  => array('2', '23', '10', '12'),
    'testscalar' => '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)
                           ),
    'version'      => 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";
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

array(6) {
  ["product_id"]=>
  string(17) "libgd%3Cscript%3E"
  ["component"]=>
  array(1) {
    [0]=>
    int(10)
  }
  ["version"]=>
  string(6) "2.0.33"
  ["doesnotexist"]=>
  NULL
  ["testscalar"]=>
  int(2)
  ["testarray"]=>
  array(4) {
    [0]=>
    int(2)
    [1]=>
    int(23)
    [2]=>
    int(10)
    [3]=>
    int(12)
  }
}

Anmerkungen

Hinweis:
Es gibt keinen REQUEST_TIME Key im INPUT_SERVER Array, weil dieser erst später in $_SERVER eingefügt wird.

Siehe auch

filter_input() - Nimmt eine Variable von Außen entgegen und filtert sie optional
filter_var_array() - Nimmt mehrere Variablen entgegen und filtert sie optional
Filtertypen

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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

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

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

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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