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@ 2013-09-20T06:32:21Z

'<?php

define('FILTER_STRUCT_FORCE_ARRAY', "\0FILTER_STRUCT_FORCE_ARRAY\0");
function filter_struct_utf8($type, array $default) {
    static $is_recursive_static = false;
    $is_recursive = $is_recursive_static;
    if (!$is_recursive) {
        $types = array(
            INPUT_GET => $_GET,
            INPUT_POST => $_POST,
            INPUT_COOKIE => $_COOKIE,
            INPUT_REQUEST => $_REQUEST,
            INPUT_ENV => $_ENV,
            INPUT_SERVER => $_SERVER,
        );
        $type = (int)$type;
        if (!isset($types[$type])) {
            return $default;
        }
        $var = $types[$type];
        $is_recursive_static = true;
    } else {
        $var = $type;
    }
    $ret = array();
    foreach ($default as $key => $value) {
        if ($value === FILTER_STRUCT_FORCE_ARRAY) {
            $ret[$key] = array();
            $arr = isset($var[$key]) ? (array)$var[$key] : array();
            foreach ($arr as $k => $v) {
                if (is_string($v) && preg_match('//u', $k) && preg_match('//u', $v)) {
                    $ret[$key][$k] = $v;
                }
            }
        } elseif (!isset($var[$key])) {
            $ret[$key] = $value;
        } elseif (is_array($value)) {
            $ret[$key] = filter_struct_utf8($var[$key], $value);
        } elseif (is_array($var[$key]) || !preg_match('//u', $var[$key])) {
            $ret[$key] = $value;
        } else {
            $ret[$key] = $var[$key];
        }
    }
    if (!$is_recursive) {
        $is_recursive_static = false;
    }
    return $ret;
}


// テスト用として代入($_POST['email']は未定義)
$_POST['name'] = array( // 異常な値(本来は文字列で来るはず)
    'hahaha' => 'I am an array', 
);
$_POST['age'] = '20'; // 正常な値
$_POST['gender'] = 'male'; // 正常な値
$_POST['options'] = array(
    'b' => 'yes', // 正常な値
    'c' => array('hahaha' => 'This is an invalid option'), // 異常な値(本来は配列はネストしないはず)
);

// $_POSTの要素を期待する形になるようにシンボルテーブルにインポートする
extract(filter_struct_utf8(INPUT_POST, array(
    'name' => '', // 異常なときは強制的に空文字列にする
    'age' => '', // 異常なときは強制的に空文字列にする
    'email' => '', // 異常なときは強制的に空文字列にする
    'gender' => '', // 異常なときは強制的に空文字列にする
    'options' => FILTER_STRUCT_FORCE_ARRAY, // 強制的に一次元配列にする
)));

// 値を見てみる
var_dump($name, $age, $email, $gender, $options);

Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: ' Fatal error: Uncaught Error: Undefined constant "INPUT_REQUEST" in /in/TpFUQ:12 Stack trace: #0 /in/TpFUQ(64): filter_struct_utf8(0, Array) #1 {main} thrown in /in/TpFUQ on line 12
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28: ' Fatal error: Uncaught Error: Undefined constant "INPUT_REQUEST" in /in/TpFUQ:12 Stack trace: #0 /in/TpFUQ(69): filter_struct_utf8(0, Array) #1 {main} thrown in /in/TpFUQ on line 12
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33: 'string(0) "" string(2) "20" string(0) "" string(4) "male" array(1) { ["b"]=> string(3) "yes" }
Output for 5.1.0 - 5.1.6: ' Notice: Use of undefined constant INPUT_POST - assumed 'INPUT_POST' in /in/TpFUQ on line 64 Notice: Use of undefined constant INPUT_GET - assumed 'INPUT_GET' in /in/TpFUQ on line 9 Notice: Use of undefined constant INPUT_POST - assumed 'INPUT_POST' in /in/TpFUQ on line 10 Notice: Use of undefined constant INPUT_COOKIE - assumed 'INPUT_COOKIE' in /in/TpFUQ on line 11 Notice: Use of undefined constant INPUT_REQUEST - assumed 'INPUT_REQUEST' in /in/TpFUQ on line 12 Notice: Use of undefined constant INPUT_ENV - assumed 'INPUT_ENV' in /in/TpFUQ on line 13 Notice: Use of undefined constant INPUT_SERVER - assumed 'INPUT_SERVER' in /in/TpFUQ on line 14 string(0) "" string(0) "" string(0) "" string(0) "" string(27) "FILTER_STRUCT_FORCE_ARRAY"
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/TpFUQ on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/TpFUQ on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/TpFUQ on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `'&'' or `T_VARIABLE' or `T_CONST' in /in/TpFUQ on line 4
Process exited with code 255.

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