defender::form_sanitizer PHP Method

    public function form_sanitizer($value, $default = "", $input_name = FALSE, $is_multiLang = FALSE)
    {
        $val = array();
        if ($input_name) {
            if ($is_multiLang) {
                foreach (fusion_get_enabled_languages() as $lang => $language) {
                    $iname = $input_name . "[" . $lang . "]";
                    if (isset($_SESSION['form_fields'][self::pageHash()][$iname])) {
                        $this->field_config = $_SESSION['form_fields'][self::pageHash()][$iname];
                        $this->field_name = $iname;
                        $this->field_value = $value[$lang];
                        $this->field_default = $default;
                        $val[$lang] = $this->validate();
                    }
                }
                if ($this->field_config['required'] && !$value[LANGUAGE]) {
                    $this->stop();
                    $iname = $input_name . "[" . LANGUAGE . "]";
                    $this->setInputError($iname);
                    return $default;
                } else {
                    foreach ($val as $lang => $value) {
                        $val[$lang] = $val[LANGUAGE];
                    }
                    return serialize($val);
                }
            } else {
                // Make sure that the input was actually defined in code..
                // AND there must be a value to worth the processing power expense!
                if (isset($_SESSION['form_fields'][self::pageHash()][$input_name])) {
                    $this->field_config = $_SESSION['form_fields'][self::pageHash()][$input_name];
                    $this->field_name = $input_name;
                    $this->field_value = $value;
                    $this->field_default = $default;
                    // These two checks won't be neccesary after we add the options in all inputs
                    // NOTE: Please don't pass 'stripinput' as callback, before we reach a callback
                    // everything is checked and sanitized already. The callback should only check
                    // if certain conditions are met then return TRUE|FALSE and not do any alterations
                    // the the value itself
                    $callback = isset($this->field_config['callback_check']) ? $this->field_config['callback_check'] : FALSE;
                    $regex = isset($this->field_config['regex']) ? $this->field_config['regex'] : FALSE;
                    $secured = $this->validate();
                    // If truly FALSE the check failed
                    if ($secured === FALSE || $this->field_config['required'] == 1 && ($secured === FALSE || $secured == '') || $secured != '' && $regex && !preg_match('@^' . $regex . '$@i', $secured) || is_callable($callback) && !$callback($secured)) {
                        // Flag that something went wrong
                        $this->stop();
                        $this->setInputError($input_name);
                        // Add regex error message.
                        if ($secured != '' && $regex && !preg_match('@^' . $regex . '$@i', $secured)) {
                            global $locale;
                            addNotice("danger", sprintf($locale['regex_error'], $this->field_config['title']));
                            unset($locale);
                        }
                        // Add a notice
                        if ($this->debug) {
                            addNotice('warning', '<strong>' . $input_name . ':</strong>' . ($this->field_config['safemode'] ? ' is in SAFEMODE and the' : '') . ' check failed');
                        }
                        // Return user's input for correction
                        return $this->field_value;
                    } else {
                        if ($this->debug) {
                            addNotice('info', $input_name . ' = ' . (is_array($secured) ? 'array' : $secured));
                        }
                        return $secured;
                    }
                } else {
                    return $default;
                }
            }
        } else {
            if ($value) {
                if (!is_array($value)) {
                    if (intval($value)) {
                        return stripinput($value);
                        // numbers
                    } else {
                        return stripinput(trim(preg_replace("/ +/i", " ", censorwords($value))));
                    }
                } else {
                    $secured = array();
                    foreach ($value as $arr => $unsecured) {
                        if (intval($unsecured)) {
                            $secured[] = stripinput($unsecured);
                            // numbers
                        } else {
                            $secured[] = stripinput(trim(preg_replace("/ +/i", " ", censorwords($unsecured))));
                        }
                    }
                    return implode($this->field_config['delimiter'], $secured);
                }
            } else {
                return $default;
            }
        }
        throw new \Exception('The form sanitizer could not handle the request! (input: ' . $input_name . ')');
    }