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<?php /** * @param integer $type Constant like INPUT_XXX * @param array $default Default structure of the specified super global var. * Following bitmasks are available: * + FILTER_STRUCT_FORCE_ARRAY - Force 1D array. * + FILTER_STRUCT_TRIM - Set trimmed string. * + FILTER_STRUCT_FULL_TRIM - Trim including full-width and no-break space. * @return string The value of the filtered super global var. * @see http://qiita.com/items/c39b9ee695a5c2e74627 */ define('FILTER_STRUCT_FORCE_ARRAY', 1); define('FILTER_STRUCT_TRIM', 2); define('FILTER_STRUCT_FULL_TRIM', 4); function filter_struct_utf8($type, array $default) { static $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])) { throw new LogicException('unknown super global var type'); } $var = $types[$type]; $is_recursive_static = true; } else { $var = $type; } $trim_chars = "\\0\x20\x09\x0a\x0d\x0b"; $full_trim_chars = "{$trim_chars}\xc2\xa0\xe3\x80\x80"; $trim_pattern = "/\A[{$trim_chars}]++|[{$trim_chars}]++\z/u"; $full_trim_pattern = "/\A[{$full_trim_chars}]++|[{$full_trim_chars}]++\z/u"; $ret = array(); foreach ($default as $key => $value) { if (is_int($value) && !($value & ( FILTER_STRUCT_FORCE_ARRAY | FILTER_STRUCT_FULL_TRIM | FILTER_STRUCT_TRIM ))) { if (!$is_recursive) { $is_recursive_static = false; } throw new LogicException('unknown bitmask'); } if (is_int($value) && $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 = $tmp; } if (isset($var[$key]) && is_array($value)) { $ret[$key] = filter_struct_utf8($var[$key], $value); } elseif (!isset($var[$key]) || is_array($var[$key])) { $ret[$key] = is_int($value) ? '' : $value; } else { if (!isset($var[$key]) || is_array($var[$key])) { $var[$key] = null; } elseif (is_int($value) && $value & FILTER_STRUCT_FULL_TRIM) { $var[$key] = preg_replace($full_trim_pattern, '', $var[$key]); } elseif (is_int($value) && $value & FILTER_STRUCT_TRIM) { $var[$key] = preg_replace($trim_pattern, '', $var[$key]); } else { $var[$key] = preg_replace('//u', '', $var[$key]); } if ($var[$key] === null) { $var[$key] = is_int($value) ? '' : $value; } $ret[$key] = $var[$key]; } } if (!$is_recursive) { $is_recursive_static = false; } return $ret; } $_POST['name'] = array( 'hahaha' => 'I am an array', ); $_POST['age'] = '　 20　'; $_POST['gender'] = 'male'; $_POST['options'] = array( 'a' => array('hahaha' => 'This is an invalid option'), 'b' => ' hoge hoge ', 'c' => array('hahaha' => 'This is an invalid option'), 'd' => "\x0a\x0a\x0a This is invalid encoding value", "\x0a\x0a\x0a" => 'This is invalid encoding key', ); extract(filter_struct_utf8(INPUT_POST, array( 'name' => '', 'age' => FILTER_STRUCT_FULL_TRIM, 'email' => '', 'gender' => '', 'options' => FILTER_STRUCT_FORCE_ARRAY | FILTER_STRUCT_TRIM, ))); var_dump($name, $age, $email, $gender, $options);