Update 'src/RR/Request.php'

src/RR/Request.php

@@ -1,813 +1,71 @@
 <?php
+
 namespace RR;
 
 class Request{
 
     const PARAM_ALPHA = 'alpha';
     const PARAM_ALPHANUM = 'alphanum';
-    const PARAM_ALPHAEXT = 'alphaext';
-    const PARAM_ALPHANUMEXT = 'alphanumext';
-    const PARAM_INT = 'int';
-    const PARAM_FLOAT = 'float';
-    const PARAM_BOOL = 'bool';
-    const PARAM_RAW = 'raw';
-    const PARAM_TEXT = 'text';
-
-    const PARAM_AUTH = 'auth';
-    const PARAM_BASE64 = 'base64';
-    const PARAM_CAPABILITY = 'capability';
-    const PARAM_CLEANHTML = 'cleanhtml';
-    const PARAM_EMAIL = 'email';
-    const PARAM_FILE = 'file';
-    const PARAM_HOST = 'host';
-    const PARAM_LANG = 'lang';
-    const PARAM_LOCALURL = 'localurl';
-    const PARAM_NOTAGS = 'notags';
-    const PARAM_PATH = 'path';
-    const PARAM_PEM = 'pem';
-    const PARAM_PERMISSION = 'permission';
-    const PARAM_RAW_TRIMMED = 'raw_trimmed';
-    const PARAM_SAFEDIR = 'safedir';
-    const PARAM_SAFEPATH = 'safepath';
-    const PARAM_SEQUENCE = 'sequence';
-    const PARAM_TAG = 'tag';
-    const PARAM_TAGLIST = 'taglist';
-    const PARAM_THEME = 'theme';
-    const PARAM_URL = 'url';
-    const PARAM_USERNAME = 'username';
-    const PARAM_STRINGID = 'stringid';
 
+    const PARAM_INT = 'integer';
+    const PARAM_DOUBLE = 'double';
 
-    public static function required_param($parname, $type) {
-        if (func_num_args() != 2 or empty($parname) or empty($type)) {
-            throw new \Exception('required_param() requires $parname and $type to be specified (parameter: '.$parname.')');
-        }
+    public static function requiredParam($parname, $type, $options = Array(), $default = ''){
         // POST has precedence.
         if (isset($_POST[$parname])) {
             $param = $_POST[$parname];
         } else if (isset($_GET[$parname])) {
             $param = $_GET[$parname];
         } else {
-            throw new \Exception('');
-        }
-
-        if (is_array($param)) {
-            return self::required_param_array($parname, $type);
+            return $default;
         }
 
-        return self::clean_param($param, $type);
-    }
+        $param = self::filter($type, $param);
 
-    public static function required_param_array($parname, $type) {
-        if (func_num_args() != 2 or empty($parname) or empty($type)) {
-            throw new \Exception('required_param_array() requires $parname and $type to be specified (parameter: '.$parname.')');
+        foreach ($options as $key => $option){
+            self::$key($param, $option);
         }
-        // POST has precedence.
-        if (isset($_POST[$parname])) {
-            $param = $_POST[$parname];
-        } else if (isset($_GET[$parname])) {
-            $param = $_GET[$parname];
-        } else {
-            throw new \Exception('');
-        }
-        if (!is_array($param)) {
-            throw new \Exception('');
-        }
-
-        $result = array();
-        foreach ($param as $key => $value) {
-            if (!preg_match('/^[a-z0-9_-]+$/i', $key)) {
-                continue;
-            }
-            $result[$key] = self::clean_param($value, $type);
-        }
-        return $result;
+        return $param;
     }
 
+    public static function requiredParamArray($parname, $type, $default = '', $options = Array() ){
 
-    public static function optional_param($parname, $default = '', $type){
-        if (func_num_args() != 3 or empty($parname) or empty($type)) {
-            throw new \Exception('optional_param requires $parname, $default + $type to be specified (parameter: '.$parname.')');
-        }
-
-        if (isset($_POST[$parname])) {
-            $param = $_POST[$parname];
-        } else if (isset($_GET[$parname])) {
-            $param = $_GET[$parname];
-        } else {
-            return $default;
-        }
-
-        if (is_array($param)) {
-            return optional_param_array($parname, $default, $type);
-        }
-
-        return self::clean_param($param, $type);
     }
 
-    public static function optional_param_array($parname, $default = Array(), $type) {
-        if (func_num_args() != 3 or empty($parname) or empty($type)) {
-            throw new \Exception('optional_param_array requires $parname, $default + $type to be specified (parameter: '.$parname.')');
-        }
-
-        // POST has precedence.
-        if (isset($_POST[$parname])) {
-            $param = $_POST[$parname];
-        } else if (isset($_GET[$parname])) {
-            $param = $_GET[$parname];
-        } else {
-            return $default;
-        }
-        if (!is_array($param)) {
-            return $default;
-        }
-
-        $result = array();
-        foreach ($param as $key => $value) {
-            if (!preg_match('/^[a-z0-9_-]+$/i', $key)) {
-                continue;
-            }
-            $result[$key] = $value;
-        }
+    public static function optionalParam(){
 
-        return $result;
     }
 
-    public static function clean_param($param, $type) {
-        global $CFG;
-
-        if (is_array($param)) {
-            throw new coding_exception('clean_param() can not process arrays, please use self::clean_param_array() instead.');
-        } else if (is_object($param)) {
-            if (method_exists($param, '__toString')) {
-                $param = $param->__toString();
-            } else {
-                throw new coding_exception('clean_param() can not process objects, please use self::clean_param_array() instead.');
-            }
-        }
-
-        switch ($type) {
-            case self::PARAM_RAW:
-                // No cleaning at all.
-                $param = self::fix_utf8($param);
-                return $param;
-
-            case self::PARAM_RAW_TRIMMED:
-                // No cleaning, but strip leading and trailing whitespace.
-                $param = self::fix_utf8($param);
-                return trim($param);
-
-            case self::PARAM_INT:
-                // Convert to integer.
-                return (int)$param;
-
-            case self::PARAM_FLOAT:
-                // Convert to float.
-                return (float)$param;
-
-            case self::PARAM_ALPHA:
-                // Remove everything not `a-z`.
-                return preg_replace('/[^a-zA-Z]/i', '', $param);
-
-            case self::PARAM_ALPHAEXT:
-                // Remove everything not `a-zA-Z_-` (originally allowed "/" too).
-                return preg_replace('/[^a-zA-Z_-]/i', '', $param);
-
-            case self::PARAM_ALPHANUM:
-                // Remove everything not `a-zA-Z0-9`.
-                return preg_replace('/[^A-Za-z0-9]/i', '', $param);
-
-            case self::PARAM_ALPHANUMEXT:
-                // Remove everything not `a-zA-Z0-9_-`.
-                return preg_replace('/[^A-Za-z0-9_-]/i', '', $param);
-
-            case self::PARAM_SEQUENCE:
-                // Remove everything not `0-9,`.
-                return preg_replace('/[^0-9,]/i', '', $param);
-
-            case self::PARAM_BOOL:
-                // Convert to 1 or 0.
-                $tempstr = strtolower($param);
-                if ($tempstr === 'on' or $tempstr === 'yes' or $tempstr === 'true') {
-                    $param = 1;
-                } else if ($tempstr === 'off' or $tempstr === 'no'  or $tempstr === 'false') {
-                    $param = 0;
-                } else {
-                    $param = empty($param) ? 0 : 1;
-                }
-                return $param;
-
-            case self::PARAM_NOTAGS:
-                // Strip all tags.
-                $param = self::fix_utf8($param);
-                return strip_tags($param);
-
-            case self::PARAM_TEXT:
-                // Leave only tags needed for multilang.
-                $param = self::fix_utf8($param);
-                // If the multilang syntax is not correct we strip all tags because it would break xhtml strict which is required
-                // for accessibility standards please note this cleaning does not strip unbalanced '>' for BC compatibility reasons.
-                do {
-                    if (strpos($param, '</lang>') !== false) {
-                        // Old and future mutilang syntax.
-                        $param = strip_tags($param, '<lang>');
-                        if (!preg_match_all('/<.*>/suU', $param, $matches)) {
-                            break;
-                        }
-                        $open = false;
-                        foreach ($matches[0] as $match) {
-                            if ($match === '</lang>') {
-                                if ($open) {
-                                    $open = false;
-                                    continue;
-                                } else {
-                                    break 2;
-                                }
-                            }
-                            if (!preg_match('/^<lang lang="[a-zA-Z0-9_-]+"\s*>$/u', $match)) {
-                                break 2;
-                            } else {
-                                $open = true;
-                            }
-                        }
-                        if ($open) {
-                            break;
-                        }
-                        return $param;
-
-                    } else if (strpos($param, '</span>') !== false) {
-                        // Current problematic multilang syntax.
-                        $param = strip_tags($param, '<span>');
-                        if (!preg_match_all('/<.*>/suU', $param, $matches)) {
-                            break;
-                        }
-                        $open = false;
-                        foreach ($matches[0] as $match) {
-                            if ($match === '</span>') {
-                                if ($open) {
-                                    $open = false;
-                                    continue;
-                                } else {
-                                    break 2;
-                                }
-                            }
-                            if (!preg_match('/^<span(\s+lang="[a-zA-Z0-9_-]+"|\s+class="multilang"){2}\s*>$/u', $match)) {
-                                break 2;
-                            } else {
-                                $open = true;
-                            }
-                        }
-                        if ($open) {
-                            break;
-                        }
-                        return $param;
-                    }
-                } while (false);
-                // Easy, just strip all tags, if we ever want to fix orphaned '&' we have to do that in format_string().
-                return strip_tags($param);
-
-            case self::PARAM_COMPONENT:
-                // We do not want any guessing here, either the name is correct or not
-                // please note only normalised component names are accepted.
-                if (!preg_match('/^[a-z]+(_[a-z][a-z0-9_]*)?[a-z0-9]+$/', $param)) {
-                    return '';
-                }
-                if (strpos($param, '__') !== false) {
-                    return '';
-                }
-                if (strpos($param, 'mod_') === 0) {
-                    // Module names must not contain underscores because we need to differentiate them from invalid plugin types.
-                    if (substr_count($param, '_') != 1) {
-                        return '';
-                    }
-                }
-                return $param;
-
-
-            case self::PARAM_SAFEDIR:
-                // Remove everything not a-zA-Z0-9_- .
-                return preg_replace('/[^a-zA-Z0-9_-]/i', '', $param);
-
-            case self::PARAM_SAFEPATH:
-                // Remove everything not a-zA-Z0-9/_- .
-                return preg_replace('/[^a-zA-Z0-9\/_-]/i', '', $param);
-
-            case self::PARAM_FILE:
-                // Strip all suspicious characters from filename.
-                $param = self::fix_utf8($param);
-                $param = preg_replace('~[[:cntrl:]]|[&<>"`\|\':\\\\/]~u', '', $param);
-                if ($param === '.' || $param === '..') {
-                    $param = '';
-                }
-                return $param;
-
-            case self::PARAM_PATH:
-                // Strip all suspicious characters from file path.
-                $param = self::fix_utf8($param);
-                $param = str_replace('\\', '/', $param);
-
-                // Explode the path and clean each element using the PARAM_FILE rules.
-                $breadcrumb = explode('/', $param);
-                foreach ($breadcrumb as $key => $crumb) {
-                    if ($crumb === '.' && $key === 0) {
-                        // Special condition to allow for relative current path such as ./currentdirfile.txt.
-                    } else {
-                        $crumb = self::clean_param($crumb, PARAM_FILE);
-                    }
-                    $breadcrumb[$key] = $crumb;
-                }
-                $param = implode('/', $breadcrumb);
-
-                // Remove multiple current path (./././) and multiple slashes (///).
-                $param = preg_replace('~//+~', '/', $param);
-                $param = preg_replace('~/(\./)+~', '/', $param);
-                return $param;
-
-            case self::PARAM_HOST:
-                // Allow FQDN or IPv4 dotted quad.
-                $param = preg_replace('/[^\.\d\w-]/', '', $param );
-                // Match ipv4 dotted quad.
-                if (preg_match('/(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/', $param, $match)) {
-                    // Confirm values are ok.
-                    if ( $match[0] > 255
-                        || $match[1] > 255
-                        || $match[3] > 255
-                        || $match[4] > 255 ) {
-                        // Hmmm, what kind of dotted quad is this?
-                        $param = '';
-                    }
-                } else if ( preg_match('/^[\w\d\.-]+$/', $param) // Dots, hyphens, numbers.
-                    && !preg_match('/^[\.-]/',$param) // No leading dots/hyphens.
-                    && !preg_match('/[\.-]$/',$param) // No trailing dots/hyphens.
-                ) {
-                    // All is ok - $param is respected.
-                } else {
-                    // All is not ok...
-                    $param='';
-                }
-                return $param;
-
-            case self::PARAM_URL:          // Allow safe ftp, http, mailto urls.
-                $param = self::fix_utf8($param);
-                if (!empty($param) && self::validateUrlSyntax($param, 's?H?S?F?E?u-P-a?I?p?f?q?r?')) {
-                    // All is ok, param is respected.
-                } else {
-                    // Not really ok.
-                    $param ='';
-                }
-                return $param;
-
-
-            case self::PARAM_PEM:
-                $param = trim($param);
-                // PEM formatted strings may contain letters/numbers and the symbols:
-                //   forward slash: /
-                //   plus sign:     +
-                //   equal sign:    =
-                //   , surrounded by BEGIN and END CERTIFICATE prefix and suffixes.
-                if (preg_match('/^-----BEGIN CERTIFICATE-----([\s\w\/\+=]+)-----END CERTIFICATE-----$/', trim($param), $matches)) {
-                    list($wholething, $body) = $matches;
-                    unset($wholething, $matches);
-                    $b64 = self::clean_param($body, PARAM_BASE64);
-                    if (!empty($b64)) {
-                        return "-----BEGIN CERTIFICATE-----\n$b64\n-----END CERTIFICATE-----\n";
-                    } else {
-                        return '';
-                    }
-                }
-                return '';
-
-            case self::PARAM_BASE64:
-                if (!empty($param)) {
-                    // PEM formatted strings may contain letters/numbers and the symbols
-                    //   forward slash: /
-                    //   plus sign:     +
-                    //   equal sign:    =.
-                    if (0 >= preg_match('/^([\s\w\/\+=]+)$/', trim($param))) {
-                        return '';
-                    }
-                    $lines = preg_split('/[\s]+/', $param, -1, PREG_SPLIT_NO_EMPTY);
-                    // Each line of base64 encoded data must be 64 characters in length, except for the last line which may be less
-                    // than (or equal to) 64 characters long.
-                    for ($i=0, $j=count($lines); $i < $j; $i++) {
-                        if ($i + 1 == $j) {
-                            if (64 < strlen($lines[$i])) {
-                                return '';
-                            }
-                            continue;
-                        }
-
-                        if (64 != strlen($lines[$i])) {
-                            return '';
-                        }
-                    }
-                    return implode("\n", $lines);
-                } else {
-                    return '';
-                }
+    public static function optionalParamArray(){
 
-            case self::PARAM_TAGLIST:
-                $param = self::fix_utf8($param);
-                $tags = explode(',', $param);
-                $result = array();
-                foreach ($tags as $tag) {
-                    $res = self::clean_param($tag, PARAM_TAG);
-                    if ($res !== '') {
-                        $result[] = $res;
-                    }
-                }
-                if ($result) {
-                    return implode(',', $result);
-                } else {
-                    return '';
-                }
-
-            case self::PARAM_USERNAME:
-                $param = self::fix_utf8($param);
-                $param = trim($param);
-                // Convert uppercase to lowercase MDL-16919.
-                $param = core_text::strtolower($param);
-                if (empty($CFG->extendedusernamechars)) {
-                    $param = str_replace(" " , "", $param);
-                    // Regular expression, eliminate all chars EXCEPT:
-                    // alphanum, dash (-), underscore (_), at sign (@) and period (.) characters.
-                    $param = preg_replace('/[^-\.@_a-z0-9]/', '', $param);
-                }
-                return $param;
-
-            case self::PARAM_EMAIL:
-                $param = self::fix_utf8($param);
-                if (validate_email($param)) {
-                    return $param;
-                } else {
-                    return '';
-                }
-
-            case self::PARAM_STRINGID:
-                if (preg_match('|^[a-zA-Z][a-zA-Z0-9\.:/_-]*$|', $param)) {
-                    return $param;
-                } else {
-                    return '';
-                }
-
-            case self::PARAM_TIMEZONE:
-                // Can be int, float(with .5 or .0) or string seperated by '/' and can have '-_'.
-                $param = self::fix_utf8($param);
-                $timezonepattern = '/^(([+-]?(0?[0-9](\.[5|0])?|1[0-3](\.0)?|1[0-2]\.5))|(99)|[[:alnum:]]+(\/?[[:alpha:]_-])+)$/';
-                if (preg_match($timezonepattern, $param)) {
-                    return $param;
-                } else {
-                    return '';
-                }
-
-            default:
-                // Doh! throw error, switched parameters in optional_param or another serious problem.
-                print_error("unknownparamtype", '', '', $type);
-        }
     }
 
-    private static function fix_utf8($value) {
-        if (is_null($value) or $value === '') {
-            return $value;
-
-        } else if (is_string($value)) {
-            if ((string)(int)$value === $value) {
-                // Shortcut.
-                return $value;
-            }
-            // No null bytes expected in our data, so let's remove it.
-            $value = str_replace("\0", '', $value);
-
-            // Note: this duplicates min_self::self::fix_utf8() intentionally.
-            static $buggyiconv = null;
-            if ($buggyiconv === null) {
-                $buggyiconv = (!function_exists('iconv') or @iconv('UTF-8', 'UTF-8//IGNORE', '100'.chr(130).'€') !== '100€');
-            }
-
-            if ($buggyiconv) {
-                if (function_exists('mb_convert_encoding')) {
-                    $subst = mb_substitute_character();
-                    mb_substitute_character('');
-                    $result = mb_convert_encoding($value, 'utf-8', 'utf-8');
-                    mb_substitute_character($subst);
-
-                } else {
-                    // Warn admins on admin/index.php page.
-                    $result = $value;
+    private static function filter($type, $paramname){
+        switch ($type){
+            case 'integer':
+                if(is_integer($paramname)){
+                    return $paramname;
                 }
-
-            } else {
-                $result = @iconv('UTF-8', 'UTF-8//IGNORE', $value);
-            }
-
-            return $result;
-
-        } else if (is_array($value)) {
-            foreach ($value as $k => $v) {
-                $value[$k] = self::fix_utf8($v);
-            }
-            return $value;
-
-        } else if (is_object($value)) {
-            // Do not modify original.
-            $value = clone($value);
-            foreach ($value as $k => $v) {
-                $value->$k = self::fix_utf8($v);
-            }
-            return $value;
-
-        } else {
-            // This is some other type, no utf-8 here.
-            return $value;
-        }
-    }
-
-    function validateUrlSyntax( $urladdr, $options="" ){
-
-        // Force Options parameter to be lower case
-        // DISABLED PERMAMENTLY - OK to remove from code
-        //    $options = strtolower($options);
-
-        // Check Options Parameter
-        if (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options ))
-        {
-            trigger_error("Options attribute malformed", E_USER_ERROR);
-        }
-
-        // Set Options Array, set defaults if options are not specified
-        // Scheme
-        if (strpos( $options, 's') === false) $aOptions['s'] = '?';
-        else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
-        // http://
-        if (strpos( $options, 'H') === false) $aOptions['H'] = '?';
-        else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
-        // https:// (SSL)
-        if (strpos( $options, 'S') === false) $aOptions['S'] = '?';
-        else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
-        // mailto: (email)
-        if (strpos( $options, 'E') === false) $aOptions['E'] = '-';
-        else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
-        // ftp://
-        if (strpos( $options, 'F') === false) $aOptions['F'] = '-';
-        else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
-        // User section
-        if (strpos( $options, 'u') === false) $aOptions['u'] = '?';
-        else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
-        // Password in user section
-        if (strpos( $options, 'P') === false) $aOptions['P'] = '?';
-        else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
-        // Address Section
-        if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
-        else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
-        // IP Address in address section
-        if (strpos( $options, 'I') === false) $aOptions['I'] = '?';
-        else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
-        // Port number
-        if (strpos( $options, 'p') === false) $aOptions['p'] = '?';
-        else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
-        // File Path
-        if (strpos( $options, 'f') === false) $aOptions['f'] = '?';
-        else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
-        // Query Section
-        if (strpos( $options, 'q') === false) $aOptions['q'] = '?';
-        else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
-        // Fragment (Anchor)
-        if (strpos( $options, 'r') === false) $aOptions['r'] = '?';
-        else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
-
-
-        // Loop through options array, to search for and replace "-" to "{0}" and "+" to ""
-        foreach($aOptions as $key => $value)
-        {
-            if ($value == '-')
-            {
-                $aOptions[$key] = '{0}';
-            }
-            if ($value == '+')
-            {
-                $aOptions[$key] = '';
-            }
-        }
-
-        // DEBUGGING - Unescape following line to display to screen current option values
-        // echo '<pre>'; print_r($aOptions); echo '</pre>';
-
-
-        // Preset Allowed Characters
-        $alphanum    = '[a-zA-Z0-9]';  // Alpha Numeric
-        $unreserved  = '[a-zA-Z0-9_.!~*' . '\'' . '()-]';
-        $escaped     = '(%[0-9a-fA-F]{2})'; // Escape sequence - In Hex - %6d would be a 'm'
-        $reserved    = '[;/?:@&=+$,]'; // Special characters in the URI
-
-        // Beginning Regular Expression
-        // Scheme - Allows for 'http://', 'https://', 'mailto:', or 'ftp://'
-        $scheme            = '(';
-        if     ($aOptions['H'] === '') { $scheme .= 'http://'; }
-        elseif ($aOptions['S'] === '') { $scheme .= 'https://'; }
-        elseif ($aOptions['E'] === '') { $scheme .= 'mailto:'; }
-        elseif ($aOptions['F'] === '') { $scheme .= 'ftp://'; }
-        else
-        {
-            if ($aOptions['H'] === '?') { $scheme .= '|(http://)'; }
-            if ($aOptions['S'] === '?') { $scheme .= '|(https://)'; }
-            if ($aOptions['E'] === '?') { $scheme .= '|(mailto:)'; }
-            if ($aOptions['F'] === '?') { $scheme .= '|(ftp://)'; }
-            $scheme = str_replace('(|', '(', $scheme); // fix first pipe
-        }
-        $scheme            .= ')' . $aOptions['s'];
-        // End setting scheme
-
-        // User Info - Allows for 'username@' or 'username:password@'. Note: contrary to rfc, I removed ':' from username section, allowing it only in password.
-        //   /---------------- Username -----------------------\  /-------------------------------- Password ------------------------------\
-        $userinfo          = '((' . $unreserved . '|' . $escaped . '|[;&=+$,]' . ')+(:(' . $unreserved . '|' . $escaped . '|[;:&=+$,]' . ')+)' . $aOptions['P'] . '@)' . $aOptions['u'];
-
-        // IP ADDRESS - Allows 0.0.0.0 to 255.255.255.255
-        $ipaddress         = '((((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9]))\.){3}((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9])))';
-
-        // Tertiary Domain(s) - Optional - Multi - Although some sites may use other characters, the RFC says tertiary domains have the same naming restrictions as second level domains
-        $domain_tertiary   = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)*';
-
-        /* MDL-9295 - take out domain_secondary here and below, so that URLs like http://localhost/ and lan addresses like http://host/ are accepted.
-                               // Second Level Domain - Required - First and last characters must be Alpha-numeric. Hyphens are allowed inside.
-            $domain_secondary  = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)';
-        */
-
-// we want more relaxed URLs in Moodle: MDL-11462
-        // Top Level Domain - First character must be Alpha. Last character must be AlphaNumeric. Hyphens are allowed inside.
-        $domain_toplevel   = '([a-zA-Z](([a-zA-Z0-9-]*)[a-zA-Z0-9])?)';
-        /*                       // Top Level Domain - Required - Domain List Current As Of December 2004. Use above escaped line to be forgiving of possible future TLD's
-            $domain_toplevel   = '(aero|biz|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|post|pro|travel|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|az|ax|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)';
-        */
-
-        // Address can be IP address or Domain
-        if ($aOptions['I'] === '{0}') {       // IP Address Not Allowed
-            $address       = '(' . $domain_tertiary . /* MDL-9295 $domain_secondary . */ $domain_toplevel . ')';
-        } elseif ($aOptions['I'] === '') {  // IP Address Required
-            $address       = '(' . $ipaddress . ')';
-        } else {                            // IP Address Optional
-            $address       = '((' . $ipaddress . ')|(' . $domain_tertiary . /* MDL-9295 $domain_secondary . */ $domain_toplevel . '))';
-        }
-        $address = $address . $aOptions['a'];
-
-        // Port Number - :80 or :8080 or :65534 Allows range of :0 to :65535
-        //    (0-59999)         |(60000-64999)   |(65000-65499)    |(65500-65529)  |(65530-65535)
-        $port_number       = '(:(([0-5]?[0-9]{1,4})|(6[0-4][0-9]{3})|(65[0-4][0-9]{2})|(655[0-2][0-9])|(6553[0-5])))' . $aOptions['p'];
-
-        // Path - Can be as simple as '/' or have multiple folders and filenames
-        $path              = '(/((;)?(' . $unreserved . '|' . $escaped . '|' . '[:@&=+$,]' . ')+(/)?)*)' . $aOptions['f'];
-
-        // Query Section - Accepts ?var1=value1&var2=value2 or ?2393,1221 and much more
-        $querystring       = '(\?(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['q'];
-
-        // Fragment Section - Accepts anchors such as #top
-        $fragment          = '(\#(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['r'];
-
-
-        // Building Regular Expression
-        $regexp = '#^' . $scheme . $userinfo . $address . $port_number . $path . $querystring . $fragment . '$#i';
-
-        // DEBUGGING - Uncomment Line Below To Display The Regular Expression Built
-        // echo '<pre>' . htmlentities(wordwrap($regexp,70,"\n",1)) . '</pre>';
-
-        // Running the regular expression
-        if (preg_match( $regexp, $urladdr ))
-        {
-            return true; // The domain passed
-        }
-        else
-        {
-            return false; // The domain didn't pass the expression
+                break;
+            case 'double':
+                if(is_double($paramname)){
+                    return $paramname;
+                }
+                break;
+            case 'alpha':
+                
         }
-
     }
 
-    function validateEmailSyntax( $emailaddr, $options="" ){
-
-        // Check Options Parameter
-        if (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options ))
-        {
-            trigger_error("Options attribute malformed", E_USER_ERROR);
-        }
-
-        // Set Options Array, set defaults if options are not specified
-        // Scheme
-        if (strpos( $options, 's') === false) $aOptions['s'] = '-';
-        else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
-        // http://
-        if (strpos( $options, 'H') === false) $aOptions['H'] = '-';
-        else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
-        // https:// (SSL)
-        if (strpos( $options, 'S') === false) $aOptions['S'] = '-';
-        else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
-        // mailto: (email)
-        if (strpos( $options, 'E') === false) $aOptions['E'] = '?';
-        else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
-        // ftp://
-        if (strpos( $options, 'F') === false) $aOptions['F'] = '-';
-        else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
-        // User section
-        if (strpos( $options, 'u') === false) $aOptions['u'] = '+';
-        else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
-        // Password in user section
-        if (strpos( $options, 'P') === false) $aOptions['P'] = '-';
-        else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
-        // Address Section
-        if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
-        else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
-        // IP Address in address section
-        if (strpos( $options, 'I') === false) $aOptions['I'] = '-';
-        else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
-        // Port number
-        if (strpos( $options, 'p') === false) $aOptions['p'] = '-';
-        else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
-        // File Path
-        if (strpos( $options, 'f') === false) $aOptions['f'] = '-';
-        else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
-        // Query Section
-        if (strpos( $options, 'q') === false) $aOptions['q'] = '-';
-        else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
-        // Fragment (Anchor)
-        if (strpos( $options, 'r') === false) $aOptions['r'] = '-';
-        else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
-
-        // Generate options
-        $newoptions = '';
-        foreach($aOptions as $key => $value)
-        {
-            $newoptions .= $key . $value;
-        }
-
-        // DEBUGGING - Uncomment line below to display generated options
-        // echo '<pre>' . $newoptions . '</pre>';
-
-        // Send to validateUrlSyntax() and return result
-        return validateUrlSyntax( $emailaddr, $newoptions);
+    /*
+     *  Validations
+     */
+    private static function minVal(){
 
     }
 
-    function validateFtpSyntax( $ftpaddr, $options="" ){
-
-        // Check Options Parameter
-        if (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options ))
-        {
-            trigger_error("Options attribute malformed", E_USER_ERROR);
-        }
-
-        // Set Options Array, set defaults if options are not specified
-        // Scheme
-        if (strpos( $options, 's') === false) $aOptions['s'] = '?';
-        else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
-        // http://
-        if (strpos( $options, 'H') === false) $aOptions['H'] = '-';
-        else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
-        // https:// (SSL)
-        if (strpos( $options, 'S') === false) $aOptions['S'] = '-';
-        else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
-        // mailto: (email)
-        if (strpos( $options, 'E') === false) $aOptions['E'] = '-';
-        else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
-        // ftp://
-        if (strpos( $options, 'F') === false) $aOptions['F'] = '+';
-        else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
-        // User section
-        if (strpos( $options, 'u') === false) $aOptions['u'] = '?';
-        else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
-        // Password in user section
-        if (strpos( $options, 'P') === false) $aOptions['P'] = '?';
-        else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
-        // Address Section
-        if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
-        else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
-        // IP Address in address section
-        if (strpos( $options, 'I') === false) $aOptions['I'] = '?';
-        else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
-        // Port number
-        if (strpos( $options, 'p') === false) $aOptions['p'] = '?';
-        else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
-        // File Path
-        if (strpos( $options, 'f') === false) $aOptions['f'] = '?';
-        else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
-        // Query Section
-        if (strpos( $options, 'q') === false) $aOptions['q'] = '-';
-        else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
-        // Fragment (Anchor)
-        if (strpos( $options, 'r') === false) $aOptions['r'] = '-';
-        else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
-
-        // Generate options
-        $newoptions = '';
-        foreach($aOptions as $key => $value)
-        {
-            $newoptions .= $key . $value;
-        }
-
-        // DEBUGGING - Uncomment line below to display generated options
-        // echo '<pre>' . $newoptions . '</pre>';
-
-        // Send to validateUrlSyntax() and return result
-        return validateUrlSyntax( $ftpaddr, $newoptions);
+    private static function maxVal(){
 
     }
 
-
 }