', $suffix = '
') { $this->_error_prefix = $prefix; $this->_error_suffix = $suffix; return $this; } // -------------------------------------------------------------------- /** * Get Error Message * * Gets the error message associated with a particular field * * @param string $field Field name * @param string $prefix HTML start tag * @param string $suffix HTML end tag * @return string */ public function error($field, $prefix = '', $suffix = '') { if (empty($this->_field_data[$field]['error'])) { return ''; } if ($prefix === '') { $prefix = $this->_error_prefix; } if ($suffix === '') { $suffix = $this->_error_suffix; } return $prefix.$this->_field_data[$field]['error'].$suffix; } // -------------------------------------------------------------------- /** * Get Array of Error Messages * * Returns the error messages as an array * * @return array */ public function error_array() { return $this->_error_array; } // -------------------------------------------------------------------- /** * Error String * * Returns the error messages as a string, wrapped in the error delimiters * * @param string * @param string * @return string */ public function error_string($prefix = '', $suffix = '') { // No errors, validation passes! if (count($this->_error_array) === 0) { return ''; } if ($prefix === '') { $prefix = $this->_error_prefix; } if ($suffix === '') { $suffix = $this->_error_suffix; } // Generate the error string $str = ''; foreach ($this->_error_array as $val) { if ($val !== '') { $str .= $prefix.$val.$suffix."\n"; } } return $str; } // -------------------------------------------------------------------- /** * Run the Validator * * This function does all the work. * * @param string $group * @return bool */ public function run($group = '') { $validation_array = empty($this->validation_data) ? $_POST : $this->validation_data; // Does the _field_data array containing the validation rules exist? // If not, we look to see if they were assigned via a config file if (count($this->_field_data) === 0) { // No validation rules? We're done... if (count($this->_config_rules) === 0) { return FALSE; } if (empty($group)) { // Is there a validation rule for the particular URI being accessed? $group = trim($this->CI->uri->ruri_string(), '/'); isset($this->_config_rules[$group]) OR $group = $this->CI->router->class.'/'.$this->CI->router->method; } $this->set_rules(isset($this->_config_rules[$group]) ? $this->_config_rules[$group] : $this->_config_rules); // Were we able to set the rules correctly? if (count($this->_field_data) === 0) { log_message('debug', 'Unable to find validation rules'); return FALSE; } } // Load the language file containing error messages $this->CI->lang->load('form_validation'); // Cycle through the rules for each field and match the corresponding $validation_data item foreach ($this->_field_data as $field => &$row) { // Fetch the data from the validation_data array item and cache it in the _field_data array. // Depending on whether the field name is an array or a string will determine where we get it from. if ($row['is_array'] === TRUE) { $this->_field_data[$field]['postdata'] = $this->_reduce_array($validation_array, $row['keys']); } elseif (isset($validation_array[$field])) { $this->_field_data[$field]['postdata'] = $validation_array[$field]; } } // Execute validation rules // Note: A second foreach (for now) is required in order to avoid false-positives // for rules like 'matches', which correlate to other validation fields. foreach ($this->_field_data as $field => &$row) { // Don't try to validate if we have no rules set if (empty($row['rules'])) { continue; } $this->_execute($row, $row['rules'], $row['postdata']); } // Did we end up with any errors? $total_errors = count($this->_error_array); if ($total_errors > 0) { $this->_safe_form_data = TRUE; } // Now we need to re-set the POST data with the new, processed data empty($this->validation_data) && $this->_reset_post_array(); return ($total_errors === 0); } // -------------------------------------------------------------------- /** * Prepare rules * * Re-orders the provided rules in order of importance, so that * they can easily be executed later without weird checks ... * * "Callbacks" are given the highest priority (always called), * followed by 'required' (called if callbacks didn't fail), * and then every next rule depends on the previous one passing. * * @param array $rules * @return array */ protected function _prepare_rules($rules) { $new_rules = array(); $callbacks = array(); foreach ($rules as &$rule) { // Let 'required' always be the first (non-callback) rule if ($rule === 'required') { array_unshift($new_rules, 'required'); } // 'isset' is a kind of a weird alias for 'required' ... elseif ($rule === 'isset' && (empty($new_rules) OR $new_rules[0] !== 'required')) { array_unshift($new_rules, 'isset'); } // The old/classic 'callback_'-prefixed rules elseif (is_string($rule) && strncmp('callback_', $rule, 9) === 0) { $callbacks[] = $rule; } // Proper callables elseif (is_callable($rule)) { $callbacks[] = $rule; } // "Named" callables; i.e. array('name' => $callable) elseif (is_array($rule) && isset($rule[0], $rule[1]) && is_callable($rule[1])) { $callbacks[] = $rule; } // Everything else goes at the end of the queue else { $new_rules[] = $rule; } } return array_merge($callbacks, $new_rules); } // -------------------------------------------------------------------- /** * Traverse a multidimensional $_POST array index until the data is found * * @param array * @param array * @param int * @return mixed */ protected function _reduce_array($array, $keys, $i = 0) { if (is_array($array) && isset($keys[$i])) { return isset($array[$keys[$i]]) ? $this->_reduce_array($array[$keys[$i]], $keys, ($i+1)) : NULL; } // NULL must be returned for empty fields return ($array === '') ? NULL : $array; } // -------------------------------------------------------------------- /** * Re-populate the _POST array with our finalized and processed data * * @return void */ protected function _reset_post_array() { foreach ($this->_field_data as $field => $row) { if ($row['postdata'] !== NULL) { if ($row['is_array'] === FALSE) { isset($_POST[$field]) && $_POST[$field] = $row['postdata']; } else { // start with a reference $post_ref =& $_POST; // before we assign values, make a reference to the right POST key if (count($row['keys']) === 1) { $post_ref =& $post_ref[current($row['keys'])]; } else { foreach ($row['keys'] as $val) { $post_ref =& $post_ref[$val]; } } $post_ref = $row['postdata']; } } } } // -------------------------------------------------------------------- /** * Executes the Validation routines * * @param array * @param array * @param mixed * @param int * @return mixed */ protected function _execute($row, $rules, $postdata = NULL, $cycles = 0) { // If the $_POST data is an array we will run a recursive call // // Note: We MUST check if the array is empty or not! // Otherwise empty arrays will always pass validation. if (is_array($postdata) && ! empty($postdata)) { foreach ($postdata as $key => $val) { $this->_execute($row, $rules, $val, $key); } return; } $rules = $this->_prepare_rules($rules); foreach ($rules as $rule) { $_in_array = FALSE; // We set the $postdata variable with the current data in our master array so that // each cycle of the loop is dealing with the processed data from the last cycle if ($row['is_array'] === TRUE && is_array($this->_field_data[$row['field']]['postdata'])) { // We shouldn't need this safety, but just in case there isn't an array index // associated with this cycle we'll bail out if ( ! isset($this->_field_data[$row['field']]['postdata'][$cycles])) { continue; } $postdata = $this->_field_data[$row['field']]['postdata'][$cycles]; $_in_array = TRUE; } else { // If we get an array field, but it's not expected - then it is most likely // somebody messing with the form on the client side, so we'll just consider // it an empty field $postdata = is_array($this->_field_data[$row['field']]['postdata']) ? NULL : $this->_field_data[$row['field']]['postdata']; } // Is the rule a callback? $callback = $callable = FALSE; if (is_string($rule)) { if (strpos($rule, 'callback_') === 0) { $rule = substr($rule, 9); $callback = TRUE; } } elseif (is_callable($rule)) { $callable = TRUE; } elseif (is_array($rule) && isset($rule[0], $rule[1]) && is_callable($rule[1])) { // We have a "named" callable, so save the name $callable = $rule[0]; $rule = $rule[1]; } // Strip the parameter (if exists) from the rule // Rules can contain a parameter: max_length[5] $param = FALSE; if ( ! $callable && preg_match('/(.*?)\[(.*)\]/', $rule, $match)) { $rule = $match[1]; $param = $match[2]; } // Ignore empty, non-required inputs with a few exceptions ... if ( ($postdata === NULL OR $postdata === '') && $callback === FALSE && $callable === FALSE && ! in_array($rule, array('required', 'isset', 'matches'), TRUE) ) { continue; } // Call the function that corresponds to the rule if ($callback OR $callable !== FALSE) { if ($callback) { if ( ! method_exists($this->CI, $rule)) { log_message('debug', 'Unable to find callback validation rule: '.$rule); $result = FALSE; } else { // Run the function and grab the result $result = $this->CI->$rule($postdata, $param); } } else { $result = is_array($rule) ? $rule[0]->{$rule[1]}($postdata) : $rule($postdata); // Is $callable set to a rule name? if ($callable !== FALSE) { $rule = $callable; } } // Re-assign the result to the master data array if ($_in_array === TRUE) { $this->_field_data[$row['field']]['postdata'][$cycles] = is_bool($result) ? $postdata : $result; } else { $this->_field_data[$row['field']]['postdata'] = is_bool($result) ? $postdata : $result; } } elseif ( ! method_exists($this, $rule)) { // If our own wrapper function doesn't exist we see if a native PHP function does. // Users can use any native PHP function call that has one param. if (function_exists($rule)) { // Native PHP functions issue warnings if you pass them more parameters than they use $result = ($param !== FALSE) ? $rule($postdata, $param) : $rule($postdata); if ($_in_array === TRUE) { $this->_field_data[$row['field']]['postdata'][$cycles] = is_bool($result) ? $postdata : $result; } else { $this->_field_data[$row['field']]['postdata'] = is_bool($result) ? $postdata : $result; } } else { log_message('debug', 'Unable to find validation rule: '.$rule); $result = FALSE; } } else { $result = $this->$rule($postdata, $param); if ($_in_array === TRUE) { $this->_field_data[$row['field']]['postdata'][$cycles] = is_bool($result) ? $postdata : $result; } else { $this->_field_data[$row['field']]['postdata'] = is_bool($result) ? $postdata : $result; } } // Did the rule test negatively? If so, grab the error. if ($result === FALSE) { // Callable rules might not have named error messages if ( ! is_string($rule)) { $line = $this->CI->lang->line('form_validation_error_message_not_set').'(Anonymous function)'; } else { $line = $this->_get_error_message($rule, $row['field']); } // Is the parameter we are inserting into the error message the name // of another field? If so we need to grab its "field label" if (isset($this->_field_data[$param], $this->_field_data[$param]['label'])) { $param = $this->_translate_fieldname($this->_field_data[$param]['label']); } // Build the error message $message = $this->_build_error_msg($line, $this->_translate_fieldname($row['label']), $param); // Save the error message $this->_field_data[$row['field']]['error'] = $message; if ( ! isset($this->_error_array[$row['field']])) { $this->_error_array[$row['field']] = $message; } return; } } } // -------------------------------------------------------------------- /** * Get the error message for the rule * * @param string $rule The rule name * @param string $field The field name * @return string */ protected function _get_error_message($rule, $field) { // check if a custom message is defined through validation config row. if (isset($this->_field_data[$field]['errors'][$rule])) { return $this->_field_data[$field]['errors'][$rule]; } // check if a custom message has been set using the set_message() function elseif (isset($this->_error_messages[$rule])) { return $this->_error_messages[$rule]; } elseif (FALSE !== ($line = $this->CI->lang->line('form_validation_'.$rule))) { return $line; } // DEPRECATED support for non-prefixed keys, lang file again elseif (FALSE !== ($line = $this->CI->lang->line($rule, FALSE))) { return $line; } return $this->CI->lang->line('form_validation_error_message_not_set').'('.$rule.')'; } // -------------------------------------------------------------------- /** * Translate a field name * * @param string the field name * @return string */ protected function _translate_fieldname($fieldname) { // Do we need to translate the field name? We look for the prefix 'lang:' to determine this // If we find one, but there's no translation for the string - just return it if (sscanf($fieldname, 'lang:%s', $line) === 1 && FALSE === ($fieldname = $this->CI->lang->line($line, FALSE))) { return $line; } return $fieldname; } // -------------------------------------------------------------------- /** * Build an error message using the field and param. * * @param string The error message line * @param string A field's human name * @param mixed A rule's optional parameter * @return string */ protected function _build_error_msg($line, $field = '', $param = '') { // Check for %s in the string for legacy support. if (strpos($line, '%s') !== FALSE) { return sprintf($line, $field, $param); } return str_replace(array('{field}', '{param}'), array($field, $param), $line); } // -------------------------------------------------------------------- /** * Checks if the rule is present within the validator * * Permits you to check if a rule is present within the validator * * @param string the field name * @return bool */ public function has_rule($field) { return isset($this->_field_data[$field]); } // -------------------------------------------------------------------- /** * Get the value from a form * * Permits you to repopulate a form field with the value it was submitted * with, or, if that value doesn't exist, with the default * * @param string the field name * @param string * @return string */ public function set_value($field = '', $default = '') { if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { return $default; } // If the data is an array output them one at a time. // E.g: form_input('name[]', set_value('name[]'); if (is_array($this->_field_data[$field]['postdata'])) { return array_shift($this->_field_data[$field]['postdata']); } return $this->_field_data[$field]['postdata']; } // -------------------------------------------------------------------- /** * Set Select * * Enables pull-down lists to be set to the value the user * selected in the event of an error * * @param string * @param string * @param bool * @return string */ public function set_select($field = '', $value = '', $default = FALSE) { if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { return ($default === TRUE && count($this->_field_data) === 0) ? ' selected="selected"' : ''; } $field = $this->_field_data[$field]['postdata']; $value = (string) $value; if (is_array($field)) { // Note: in_array('', array(0)) returns TRUE, do not use it foreach ($field as &$v) { if ($value === $v) { return ' selected="selected"'; } } return ''; } elseif (($field === '' OR $value === '') OR ($field !== $value)) { return ''; } return ' selected="selected"'; } // -------------------------------------------------------------------- /** * Set Radio * * Enables radio buttons to be set to the value the user * selected in the event of an error * * @param string * @param string * @param bool * @return string */ public function set_radio($field = '', $value = '', $default = FALSE) { if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { return ($default === TRUE && count($this->_field_data) === 0) ? ' checked="checked"' : ''; } $field = $this->_field_data[$field]['postdata']; $value = (string) $value; if (is_array($field)) { // Note: in_array('', array(0)) returns TRUE, do not use it foreach ($field as &$v) { if ($value === $v) { return ' checked="checked"'; } } return ''; } elseif (($field === '' OR $value === '') OR ($field !== $value)) { return ''; } return ' checked="checked"'; } // -------------------------------------------------------------------- /** * Set Checkbox * * Enables checkboxes to be set to the value the user * selected in the event of an error * * @param string * @param string * @param bool * @return string */ public function set_checkbox($field = '', $value = '', $default = FALSE) { // Logic is exactly the same as for radio fields return $this->set_radio($field, $value, $default); } // -------------------------------------------------------------------- /** * Required * * @param string * @return bool */ public function required($str) { return is_array($str) ? (empty($str) === FALSE) : (trim($str) !== ''); } // -------------------------------------------------------------------- /** * Performs a Regular Expression match test. * * @param string * @param string regex * @return bool */ public function regex_match($str, $regex) { return (bool) preg_match($regex, $str); } // -------------------------------------------------------------------- /** * Match one field to another * * @param string $str string to compare against * @param string $field * @return bool */ public function matches($str, $field) { return isset($this->_field_data[$field], $this->_field_data[$field]['postdata']) ? ($str === $this->_field_data[$field]['postdata']) : FALSE; } // -------------------------------------------------------------------- /** * Differs from another field * * @param string * @param string field * @return bool */ public function differs($str, $field) { return ! (isset($this->_field_data[$field]) && $this->_field_data[$field]['postdata'] === $str); } // -------------------------------------------------------------------- /** * Is Unique * * Check if the input value doesn't already exist * in the specified database field. * * @param string $str * @param string $field * @return bool */ public function is_unique($str, $field) { sscanf($field, '%[^.].%[^.]', $table, $field); return isset($this->CI->db) ? ($this->CI->db->limit(1)->get_where($table, array($field => $str))->num_rows() === 0) : FALSE; } // -------------------------------------------------------------------- /** * Minimum Length * * @param string * @param string * @return bool */ public function min_length($str, $val) { if ( ! is_numeric($val)) { return FALSE; } return ($val <= mb_strlen($str)); } // -------------------------------------------------------------------- /** * Max Length * * @param string * @param string * @return bool */ public function max_length($str, $val) { if ( ! is_numeric($val)) { return FALSE; } return ($val >= mb_strlen($str)); } // -------------------------------------------------------------------- /** * Exact Length * * @param string * @param string * @return bool */ public function exact_length($str, $val) { if ( ! is_numeric($val)) { return FALSE; } return (mb_strlen($str) === (int) $val); } // -------------------------------------------------------------------- /** * Valid URL * * @param string $str * @return bool */ public function valid_url($str) { if (empty($str)) { return FALSE; } elseif (preg_match('/^(?:([^:]*)\:)?\/\/(.+)$/', $str, $matches)) { if (empty($matches[2])) { return FALSE; } elseif ( ! in_array(strtolower($matches[1]), array('http', 'https'), TRUE)) { return FALSE; } $str = $matches[2]; } // PHP 7 accepts IPv6 addresses within square brackets as hostnames, // but it appears that the PR that came in with https://bugs.php.net/bug.php?id=68039 // was never merged into a PHP 5 branch ... https://3v4l.org/8PsSN if (preg_match('/^\[([^\]]+)\]/', $str, $matches) && ! is_php('7') && filter_var($matches[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== FALSE) { $str = 'ipv6.host'.substr($str, strlen($matches[1]) + 2); } return (filter_var('http://'.$str, FILTER_VALIDATE_URL) !== FALSE); } // -------------------------------------------------------------------- /** * Valid Email * * @param string * @return bool */ public function valid_email($str) { if (function_exists('idn_to_ascii') && sscanf($str, '%[^@]@%s', $name, $domain) === 2) { $str = $name.'@'.idn_to_ascii($domain); } return (bool) filter_var($str, FILTER_VALIDATE_EMAIL); } // -------------------------------------------------------------------- /** * Valid Emails * * @param string * @return bool */ public function valid_emails($str) { if (strpos($str, ',') === FALSE) { return $this->valid_email(trim($str)); } foreach (explode(',', $str) as $email) { if (trim($email) !== '' && $this->valid_email(trim($email)) === FALSE) { return FALSE; } } return TRUE; } // -------------------------------------------------------------------- /** * Validate IP Address * * @param string * @param string 'ipv4' or 'ipv6' to validate a specific IP format * @return bool */ public function valid_ip($ip, $which = '') { return $this->CI->input->valid_ip($ip, $which); } // -------------------------------------------------------------------- /** * Validate MAC address * * @param string $mac * @return bool */ public function valid_mac($mac) { if ( ! is_php('5.5')) { // Most common format, with either dash or colon delimiters if (preg_match('#\A[0-9a-f]{2}(?