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gump.class.php
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gump.class.php
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<?php
/**
* GUMP - A fast, extensible PHP input validation class
*
* @author Sean Nieuwoudt (http://twitter.com/SeanNieuwoudt)
* @copyright Copyright (c) 2014 Wixelhq.com
* @link http://github.com/Wixel/GUMP
* @version 1.0
*/
class GUMP
{
// Validation rules for execution
protected $validation_rules = array();
// Filter rules for execution
protected $filter_rules = array();
// Instance attribute containing errors from last run
protected $errors = array();
// Contain readable field names that have been set manually
protected static $fields = array();
// Custom validation methods
protected static $validation_methods = array();
// Customer filter methods
protected static $filter_methods = array();
// ** ------------------------- Validation Data ------------------------------- ** //
public static $basic_tags = "<br><p><a><strong><b><i><em><img><blockquote><code><dd><dl><hr><h1><h2><h3><h4><h5><h6><label><ul><li><span><sub><sup>";
public static $en_noise_words = "about,after,all,also,an,and,another,any,are,as,at,be,because,been,before,
being,between,both,but,by,came,can,come,could,did,do,each,for,from,get,
got,has,had,he,have,her,here,him,himself,his,how,if,in,into,is,it,its,it's,like,
make,many,me,might,more,most,much,must,my,never,now,of,on,only,or,other,
our,out,over,said,same,see,should,since,some,still,such,take,than,that,
the,their,them,then,there,these,they,this,those,through,to,too,under,up,
very,was,way,we,well,were,what,where,which,while,who,with,would,you,your,a,
b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,$,1,2,3,4,5,6,7,8,9,0,_";
// ** ------------------------- Validation Helpers ---------------------------- ** //
/**
* Shorthand method for inline validation
*
* @param array $data The data to be validated
* @param array $validators The GUMP validators
* @return mixed True(boolean) or the array of error messages
*/
public static function is_valid(array $data, array $validators)
{
$gump = new Gump();
$gump->validation_rules($validators);
if($gump->run($data) === false) {
return $gump->get_readable_errors(false);
} else {
return true;
}
}
/**
* Shorthand method for running only the data filters
*
* @param array $data
* @param array $filters
*/
public static function filter_input(array $data, array $filters)
{
$gump = new Gump();
return $gump->filter($data, $filters);
}
/**
* Magic method to generate the validation error messages
*
* @return string
*/
public function __toString()
{
return $this->get_readable_errors(true);
}
/**
* Perform XSS clean to prevent cross site scripting
*
* @static
* @access public
* @param array $data
* @return array
*/
public static function xss_clean(array $data)
{
foreach($data as $k => $v)
{
$data[$k] = filter_var($v, FILTER_SANITIZE_STRING);
}
return $data;
}
/**
* Adds a custom validation rule using a callback function
*
* @access public
* @param string $rule
* @param callable $callback
* @return bool
*/
public static function add_validator($rule, $callback)
{
$method = 'validate_'.$rule;
if(method_exists(__CLASS__, $method) || isset(self::$validation_methods[$rule])) {
throw new Exception("Validator rule '$rule' already exists.");
}
self::$validation_methods[$rule] = $callback;
return true;
}
/**
* Adds a custom filter using a callback function
*
* @access public
* @param string $rule
* @param callable $callback
* @return bool
*/
public static function add_filter($rule, $callback)
{
$method = 'filter_'.$rule;
if(method_exists(__CLASS__, $method) || isset(self::$filter_methods[$rule])) {
throw new Exception("Filter rule '$rule' already exists.");
}
self::$filter_methods[$rule] = $callback;
return true;
}
/**
* Getter/Setter for the validation rules
*
* @param array $rules
* @return array
*/
public function validation_rules(array $rules = array())
{
if(empty($rules)) {
return $this->validation_rules;
}
$this->validation_rules = $rules;
}
/**
* Getter/Setter for the filter rules
*
* @param array $rules
* @return array
*/
public function filter_rules(array $rules = array())
{
if(empty($rules)) {
return $this->filter_rules;
}
$this->filter_rules = $rules;
}
/**
* Run the filtering and validation after each other
*
* @param array $data
* @return array
* @return boolean
*/
public function run(array $data, $check_fields = false)
{
$data = $this->filter($data, $this->filter_rules());
$validated = $this->validate(
$data, $this->validation_rules()
);
if($check_fields === true) {
$this->check_fields($data);
}
if($validated !== true) {
return false;
}
return $data;
}
/**
* Ensure that the field counts match the validation rule counts
*
* @param array $data
*/
private function check_fields(array $data)
{
$ruleset = $this->validation_rules();
$mismatch = array_diff_key($data, $ruleset);
$fields = array_keys($mismatch);
foreach ($fields as $field) {
$this->errors[] = array(
'field' => $field,
'value' => $data[$field],
'rule' => 'mismatch',
'param' => NULL
);
}
}
/**
* Sanitize the input data
*
* @access public
* @param array $data
* @return array
*/
public function sanitize(array $input, $fields = NULL, $utf8_encode = true)
{
$magic_quotes = (bool)get_magic_quotes_gpc();
if(is_null($fields))
{
$fields = array_keys($input);
}
$return = array();
foreach($fields as $field)
{
if(!isset($input[$field]))
{
continue;
}
else
{
$value = $input[$field];
if(is_string($value))
{
if($magic_quotes === TRUE)
{
$value = stripslashes($value);
}
if(strpos($value, "\r") !== FALSE)
{
$value = trim($value);
}
if(function_exists('iconv') && function_exists('mb_detect_encoding') && $utf8_encode)
{
$current_encoding = mb_detect_encoding($value);
if($current_encoding != 'UTF-8' && $current_encoding != 'UTF-16') {
$value = iconv($current_encoding, 'UTF-8', $value);
}
}
$value = filter_var($value, FILTER_SANITIZE_STRING);
}
$return[$field] = $value;
}
}
return $return;
}
/**
* Return the error array from the last validation run
*
* @return array
*/
public function errors()
{
return $this->errors;
}
/**
* Perform data validation against the provided ruleset
*
* @access public
* @param mixed $input
* @param array $ruleset
* @return mixed
*/
public function validate(array $input, array $ruleset)
{
$this->errors = array();
foreach($ruleset as $field => $rules)
{
#if(!array_key_exists($field, $input))
#{
# continue;
#}
$rules = explode('|', $rules);
if(in_array("required", $rules) || (isset($input[$field]) && trim($input[$field]) != ''))
{
foreach($rules as $rule)
{
$method = NULL;
$param = NULL;
if(strstr($rule, ',') !== FALSE) // has params
{
$rule = explode(',', $rule);
$method = 'validate_'.$rule[0];
$param = $rule[1];
$rule = $rule[0];
}
else
{
$method = 'validate_'.$rule;
}
if(is_callable(array($this, $method)))
{
$result = $this->$method($field, $input, $param);
if(is_array($result)) // Validation Failed
{
$this->errors[] = $result;
}
}
else if (isset(self::$validation_methods[$rule]))
{
if (isset($input[$field])) {
$result = call_user_func(self::$validation_methods[$rule], $field, $input, $param);
if (!$result) // Validation Failed
{
$this->errors[] = array(
'field' => $field,
'value' => $input[$field],
'rule' => $method,
'param' => $param
);
}
}
}
else
{
throw new Exception("Validator method '$method' does not exist.");
}
}
}
}
return (count($this->errors) > 0)? $this->errors : TRUE;
}
/**
* Set a readable name for a specified field names
*
* @param string $field_class
* @param string $readable_name
* @return void
*/
public static function set_field_name($field, $readable_name)
{
self::$fields[$field] = $readable_name;
}
/**
* Process the validation errors and return human readable error messages
*
* @param bool $convert_to_string = false
* @param string $field_class
* @param string $error_class
* @return array
* @return string
*/
public function get_readable_errors($convert_to_string = false, $field_class="field", $error_class="error-message")
{
if(empty($this->errors)) {
return ($convert_to_string)? null : array();
}
$resp = array();
foreach($this->errors as $e) {
$field = ucwords(str_replace(array('_','-'), chr(32), $e['field']));
$param = $e['param'];
// Let's fetch explicit field names if they exist
if(array_key_exists($e['field'], self::$fields)) {
$field = self::$fields[$e['field']];
}
switch($e['rule']) {
case 'mismatch' :
$resp[] = "There is no validation rule for <span class=\"$field_class\">$field</span>";
break;
case 'validate_required':
$resp[] = "The <span class=\"$field_class\">$field</span> field is required";
break;
case 'validate_valid_email':
$resp[] = "The <span class=\"$field_class\">$field</span> field is required to be a valid email address";
break;
case 'validate_max_len':
if($param == 1) {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be shorter than $param character";
} else {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be shorter than $param characters";
}
break;
case 'validate_min_len':
if($param == 1) {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be longer than $param character";
} else {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be longer than $param characters";
}
break;
case 'validate_exact_len':
if($param == 1) {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be exactly $param character in length";
} else {
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be exactly $param characters in length";
}
break;
case 'validate_alpha':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain alpha characters(a-z)";
break;
case 'validate_alpha_numeric':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain alpha-numeric characters";
break;
case 'validate_alpha_dash':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain alpha characters & dashes";
break;
case 'validate_numeric':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain numeric characters";
break;
case 'validate_integer':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain a numeric value";
break;
case 'validate_boolean':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain a true or false value";
break;
case 'validate_float':
$resp[] = "The <span class=\"$field_class\">$field</span> field may only contain a float value";
break;
case 'validate_valid_url':
$resp[] = "The <span class=\"$field_class\">$field</span> field is required to be a valid URL";
break;
case 'validate_url_exists':
$resp[] = "The <span class=\"$field_class\">$field</span> URL does not exist";
break;
case 'validate_valid_ip':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to contain a valid IP address";
break;
case 'validate_valid_cc':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to contain a valid credit card number";
break;
case 'validate_valid_name':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to contain a valid human name";
break;
case 'validate_contains':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to contain one of these values: ".implode(', ', $param);
break;
case 'validate_street_address':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be a valid street address";
break;
case 'validate_date':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be a valid date";
break;
case 'validate_min_numeric':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be a numeric value, equal to, or higher than $param";
break;
case 'validate_max_numeric':
$resp[] = "The <span class=\"$field_class\">$field</span> field needs to be a numeric value, equal to, or lower than $param";
break;
default:
$resp[] = "The <span class=\"$field_class\">$field</span> field is invalid";
}
}
if(!$convert_to_string) {
return $resp;
} else {
$buffer = '';
foreach($resp as $s) {
$buffer .= "<span class=\"$error_class\">$s</span>";
}
return $buffer;
}
}
/**
* Filter the input data according to the specified filter set
*
* @access public
* @param mixed $input
* @param array $filterset
* @return mixed
*/
public function filter(array $input, array $filterset)
{
foreach($filterset as $field => $filters)
{
if(!array_key_exists($field, $input))
{
continue;
}
$filters = explode('|', $filters);
foreach($filters as $filter)
{
$params = NULL;
if(strstr($filter, ',') !== FALSE)
{
$filter = explode(',', $filter);
$params = array_slice($filter, 1, count($filter) - 1);
$filter = $filter[0];
}
if(is_callable(array($this, 'filter_'.$filter)))
{
$method = 'filter_'.$filter;
$input[$field] = $this->$method($input[$field], $params);
}
else if(function_exists($filter))
{
$input[$field] = $filter($input[$field]);
}
else if (isset(self::$filter_methods[$filter]))
{
$input[$field] = call_user_func(self::$filter_methods[$filter], $input[$field], $params);
}
else
{
throw new Exception("Filter method '$filter' does not exist.");
}
}
}
return $input;
}
// ** ------------------------- Filters --------------------------------------- ** //
/**
* Replace noise words in a string (http://tax.cchgroup.com/help/Avoiding_noise_words_in_your_search.htm)
*
* Usage: '<index>' => 'noise_words'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_noise_words($value, $params = NULL)
{
$value = preg_replace('/\s\s+/u', chr(32),$value);
$value = " $value ";
$words = explode(',', self::$en_noise_words);
foreach($words as $word)
{
$word = trim($word);
$word = " $word "; // Normalize
if(stripos($value, $word) !== FALSE)
{
$value = str_ireplace($word, chr(32), $value);
}
}
return trim($value);
}
/**
* Remove all known punctuation from a string
*
* Usage: '<index>' => 'rmpunctuataion'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_rmpunctuation($value, $params = NULL)
{
return preg_replace("/(?![.=$'€%-])\p{P}/u", '', $value);
}
/**
* Translate an input string to a desired language [DEPRECIATED]
*
* Any ISO 639-1 2 character language code may be used
*
* See: http://www.science.co.il/language/Codes.asp?s=code2
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
/*
protected function filter_translate($value, $params = NULL)
{
$input_lang = 'en';
$output_lang = 'en';
if(is_null($params))
{
return $value;
}
switch(count($params))
{
case 1:
$input_lang = $params[0];
break;
case 2:
$input_lang = $params[0];
$output_lang = $params[1];
break;
}
$text = urlencode($value);
$translation = file_get_contents(
"http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q={$text}&langpair={$input_lang}|{$output_lang}"
);
$json = json_decode($translation, true);
if($json['responseStatus'] != 200)
{
return $value;
}
else
{
return $json['responseData']['translatedText'];
}
}
*/
/**
* Sanitize the string by removing any script tags
*
* Usage: '<index>' => 'sanitize_string'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_sanitize_string($value, $params = NULL)
{
return filter_var($value, FILTER_SANITIZE_STRING);
}
/**
* Sanitize the string by urlencoding characters
*
* Usage: '<index>' => 'urlencode'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_urlencode($value, $params = NULL)
{
return filter_var($value, FILTER_SANITIZE_ENCODED);
}
/**
* Sanitize the string by converting HTML characters to their HTML entities
*
* Usage: '<index>' => 'htmlencode'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_htmlencode($value, $params = NULL)
{
return filter_var($value, FILTER_SANITIZE_SPECIAL_CHARS);
}
/**
* Sanitize the string by removing illegal characters from emails
*
* Usage: '<index>' => 'sanitize_email'
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_sanitize_email($value, $params = NULL)
{
return filter_var($value, FILTER_SANITIZE_EMAIL);
}
/**
* Sanitize the string by removing illegal characters from numbers
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_sanitize_numbers($value, $params = NULL)
{
return filter_var($value, FILTER_SANITIZE_NUMBER_INT);
}
/**
* Filter out all HTML tags except the defined basic tags
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_basic_tags($value, $params = NULL)
{
return strip_tags($value, self::$basic_tags);
}
/**
* Convert the provided numeric value to a whole number
*
* @access protected
* @param string $value
* @param array $params
* @return string
*/
protected function filter_whole_number($value, $params = NULL)
{
return intval($value);
}
// ** ------------------------- Validators ------------------------------------ ** //
/**
* Verify that a value is contained within the pre-defined value set
*
* Usage: '<index>' => 'contains,value value value'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_contains($field, $input, $param = NULL)
{
if(!isset($input[$field]))
{
return;
}
$param = trim(strtolower($param));
$value = trim(strtolower($input[$field]));
if (preg_match_all('#\'(.+?)\'#', $param, $matches, PREG_PATTERN_ORDER)) {
$param = $matches[1];
} else {
$param = explode(chr(32), $param);
}
if(in_array($value, $param)) { // valid, return nothing
return;
}
return array(
'field' => $field,
'value' => $value,
'rule' => __FUNCTION__,
'param' => $param
);
}
/**
* Check if the specified key is present and not empty
*
* Usage: '<index>' => 'required'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_required($field, $input, $param = NULL)
{
if(isset($input[$field]) && ($input[$field] === false || $input[$field] === 0 || $input[$field] === 0.0 || $input[$field] === "0" || !empty($input[$field])))
{
return;
}
return array(
'field' => $field,
'value' => NULL,
'rule' => __FUNCTION__,
'param' => $param
);
}
/**
* Determine if the provided email is valid
*
* Usage: '<index>' => 'valid_email'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_valid_email($field, $input, $param = NULL)
{
if(!isset($input[$field]) || empty($input[$field]))
{
return;
}
if(!filter_var($input[$field], FILTER_VALIDATE_EMAIL))
{
return array(
'field' => $field,
'value' => $input[$field],
'rule' => __FUNCTION__,
'param' => $param
);
}
}
/**
* Determine if the provided value length is less or equal to a specific value
*
* Usage: '<index>' => 'max_len,240'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_max_len($field, $input, $param = NULL)
{
if(!isset($input[$field]))
{
return;
}
if(function_exists('mb_strlen'))
{
if(mb_strlen($input[$field]) <= (int)$param)
{
return;
}
}
else
{
if(strlen($input[$field]) <= (int)$param)
{
return;
}
}
return array(
'field' => $field,
'value' => $input[$field],
'rule' => __FUNCTION__,
'param' => $param
);
}
/**
* Determine if the provided value length is more or equal to a specific value
*
* Usage: '<index>' => 'min_len,4'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_min_len($field, $input, $param = NULL)
{
if(!isset($input[$field]))
{
return;
}
if(function_exists('mb_strlen'))
{
if(mb_strlen($input[$field]) >= (int)$param)
{
return;
}
}
else
{
if(strlen($input[$field]) >= (int)$param)
{
return;
}
}
return array(
'field' => $field,
'value' => $input[$field],
'rule' => __FUNCTION__,
'param' => $param
);
}
/**
* Determine if the provided value length matches a specific value
*
* Usage: '<index>' => 'exact_len,5'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_exact_len($field, $input, $param = NULL)
{
if(!isset($input[$field]))
{
return;
}
if(function_exists('mb_strlen'))
{
if(mb_strlen($input[$field]) == (int)$param)
{
return;
}
}
else
{
if(strlen($input[$field]) == (int)$param)
{
return;
}
}
return array(
'field' => $field,
'value' => $input[$field],
'rule' => __FUNCTION__,
'param' => $param
);
}
/**
* Determine if the provided value contains only alpha characters
*
* Usage: '<index>' => 'alpha'
*
* @access protected
* @param string $field
* @param array $input
* @return mixed
*/
protected function validate_alpha($field, $input, $param = NULL)
{
if(!isset($input[$field]) || empty($input[$field]))
{
return;
}
if(!preg_match("/^([a-zÀÁÂÃÄÅÇÈÉÊËÌÍÎÏÒÓÔÕÖÙÚÛÜÝàáâãäåçèéêëìíîïðòóôõöùúûüýÿ])+$/i", $input[$field]) !== FALSE)
{
return array(
'field' => $field,