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@ 2013-09-10T06:48:53Z

<?
function filter_input_utf8($type, $default = array()) {
    static $is_recursive_static = false;
    $is_recursive = $is_recursive_static;
    if (!$is_recursive_static) {
        $types = array(
            INPUT_GET => $_GET,
            INPUT_POST => $_POST,
            INPUT_COOKIE => $_COOKIE,
            INPUT_REQUEST => $_REQUEST,
            INPUT_ENV => $_ENV,
            INPUT_SERVER => $_SERVER,
        );
        if (!isset($types[$type])) {
            return $default;
        }
        $var = $types[$type];
        $is_recursive_static = true;
    } else {
        $var = $type;
    }
    $ret = array();
    foreach ((array)$default as $key => $value) {
        if (!isset($var[$key])) {
            $ret[$key] = $value;
        } elseif (is_array($value)) {
            $ret[$key] = filter_input_utf8($var[$key], $value);
        } elseif (is_array($var[$key]) || !preg_match('//u', $var)) {
            $ret[$key] = $value;
        } else {
            $ret[$key] = $var[$key];
        }
    }
    if (!$is_recursive) {
        $is_recursive_static = false;
    }
    return $ret;
}
$_POST = array(
    'a' => array(
        'b' => 'Invalid Data',
    ),
    'c' => array(
        'd' => 'Valid Data',
    ),
    'e' => 'Valid Data',
    'f' => 'Unneeded Data',
);
$post = filter_input_utf8($_POST, array(
    'a' => null,
    'c' => array(
        'd' => null,
    ),
    'e' => null,
));
var_dump($post);

Output for git.master, git.master_jit, rfc.property-hooks: <? function filter_input_utf8($type, $default = array()) { static $is_recursive_static = false; $is_recursive = $is_recursive_static; if (!$is_recursive_static) { $types = array( INPUT_GET => $_GET, INPUT_POST => $_POST, INPUT_COOKIE => $_COOKIE, INPUT_REQUEST => $_REQUEST, INPUT_ENV => $_ENV, INPUT_SERVER => $_SERVER, ); if (!isset($types[$type])) { return $default; } $var = $types[$type]; $is_recursive_static = true; } else { $var = $type; } $ret = array(); foreach ((array)$default as $key => $value) { if (!isset($var[$key])) { $ret[$key] = $value; } elseif (is_array($value)) { $ret[$key] = filter_input_utf8($var[$key], $value); } elseif (is_array($var[$key]) || !preg_match('//u', $var)) { $ret[$key] = $value; } else { $ret[$key] = $var[$key]; } } if (!$is_recursive) { $is_recursive_static = false; } return $ret; } $_POST = array( 'a' => array( 'b' => 'Invalid Data', ), 'c' => array( 'd' => 'Valid Data', ), 'e' => 'Valid Data', 'f' => 'Unneeded Data', ); $post = filter_input_utf8($_POST, array( 'a' => null, 'c' => array( 'd' => null, ), 'e' => null, )); var_dump($post);

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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