'; /** * End tag for error wrapping * * @var string */ protected $_error_suffix = '

'; /** * Custom error message * * @var string */ protected $error_string = ''; /** * Whether the form data has been validated as safe * * @var bool */ protected $_safe_form_data = FALSE; /** * Custom data to validate * * @var array */ public $validation_data = array(); /** * Initialize Form_Validation class * * @param array $rules * @return void */ public function __construct($rules = array()) { $this->CI =& get_instance(); // applies delimiters set in config file. if (isset($rules['error_prefix'])) { $this->_error_prefix = $rules['error_prefix']; unset($rules['error_prefix']); } if (isset($rules['error_suffix'])) { $this->_error_suffix = $rules['error_suffix']; unset($rules['error_suffix']); } // Validation rules can be stored in a config file. $this->_config_rules = $rules; // Automatically load the form helper $this->CI->load->helper('form'); log_message('debug', 'Form Validation Class Initialized'); } // -------------------------------------------------------------------- /** * Set Rules * * This function takes an array of field names and validation * rules as input, any custom error messages, validates the info, * and stores it * * @param mixed $field * @param string $label * @param mixed $rules * @param array $errors * @return CI_Form_validation */ public function set_rules($field, $label = '', $rules = array(), $errors = array()) { // No reason to set rules if we have no POST data // or a validation array has not been specified if ($this->CI->input->method() !== 'post' && empty($this->validation_data)) { return $this; } // If an array was passed via the first parameter instead of individual string // values we cycle through it and recursively call this function. if (is_array($field)) { foreach ($field as $row) { // Houston, we have a problem... if ( ! isset($row['field'], $row['rules'])) { continue; } // If the field label wasn't passed we use the field name $label = isset($row['label']) ? $row['label'] : $row['field']; // Add the custom error message array $errors = (isset($row['errors']) && is_array($row['errors'])) ? $row['errors'] : array(); // Here we go! $this->set_rules($row['field'], $label, $row['rules'], $errors); } return $this; } // No fields? Nothing to do... if ( ! is_string($field) OR $field === '') { return $this; } elseif ( ! is_array($rules)) { // BC: Convert pipe-separated rules string to an array if (is_string($rules)) { $rules = explode('|', $rules); } else { return $this; } } // If the field label wasn't passed we use the field name $label = ($label === '') ? $field : $label; $indexes = array(); // Is the field name an array? If it is an array, we break it apart // into its components so that we can fetch the corresponding POST data later if (($is_array = (bool) preg_match_all('/\[(.*?)\]/', $field, $matches)) === TRUE) { sscanf($field, '%[^[][', $indexes[0]); for ($i = 0, $c = count($matches[0]); $i < $c; $i++) { if ($matches[1][$i] !== '') { $indexes[] = $matches[1][$i]; } } } // Build our master array $this->_field_data[$field] = array( 'field' => $field, 'label' => $label, 'rules' => $rules, 'errors' => $errors, 'is_array' => $is_array, 'keys' => $indexes, 'postdata' => NULL, 'error' => '' ); return $this; } // -------------------------------------------------------------------- /** * By default, form validation uses the $_POST array to validate * * If an array is set through this method, then this array will * be used instead of the $_POST array * * Note that if you are validating multiple arrays, then the * reset_validation() function should be called after validating * each array due to the limitations of CI's singleton * * @param array $data * @return CI_Form_validation */ public function set_data(array $data) { if ( ! empty($data)) { $this->validation_data = $data; } return $this; } // -------------------------------------------------------------------- /** * Set Error Message * * Lets users set their own error messages on the fly. Note: * The key name has to match the function name that it corresponds to. * * @param array * @param string * @return CI_Form_validation */ public function set_message($lang, $val = '') { if ( ! is_array($lang)) { $lang = array($lang => $val); } $this->_error_messages = array_merge($this->_error_messages, $lang); return $this; } // -------------------------------------------------------------------- /** * Set The Error Delimiter * * Permits a prefix/suffix to be added to each error message * * @param string * @param string * @return CI_Form_validation */ public function set_error_delimiters($prefix = '

', $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 = '') { // Do we even have any data to process? Mm? $validation_array = empty($this->validation_data) ? $_POST : $this->validation_data; if (count($validation_array) === 0) { return FALSE; } // 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]) && $validation_array[$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'], $this->_field_data[$field]['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 $this->_reset_post_array(); return ($total_errors === 0); } // -------------------------------------------------------------------- /** * 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 ($row['is_array'] === FALSE) { if (isset($_POST[$row['field']])) { $_POST[$row['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]; } } if (is_array($row['postdata'])) { $array = array(); foreach ($row['postdata'] as $k => $v) { $array[$k] = $v; } $post_ref = $array; } else { $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 $_POST data is an array we will run a recursive call if (is_array($postdata)) { foreach ($postdata as $key => $val) { $this->_execute($row, $rules, $val, $key); } return; } // If the field is blank, but NOT required, no further tests are necessary $callback = FALSE; if ( ! in_array('required', $rules) && ($postdata === NULL OR $postdata === '')) { // Before we bail out, does the rule contain a callback? foreach ($rules as &$rule) { if (is_string($rule)) { if (strncmp($rule, 'callback_', 9) === 0) { $callback = TRUE; $rules = array(1 => $rule); break; } } elseif (is_callable($rule)) { $callback = TRUE; $rules = array(1 => $rule); break; } } if ( ! $callback) { return; } } // Isset Test. Typically this rule will only apply to checkboxes. if (($postdata === NULL OR $postdata === '') && ! $callback) { if (in_array('isset', $rules, TRUE) OR in_array('required', $rules)) { // Set the message type $type = in_array('required', $rules) ? 'required' : 'isset'; // Check if a custom message is defined if (isset($this->_field_data[$row['field']]['errors'][$type])) { $line = $this->_field_data[$row['field']]['errors'][$type]; } elseif (isset($this->_error_messages[$type])) { $line = $this->_error_messages[$type]; } elseif (FALSE === ($line = $this->CI->lang->line('form_validation_'.$type)) // DEPRECATED support for non-prefixed keys && FALSE === ($line = $this->CI->lang->line($type, FALSE))) { $line = 'The field was not set'; } // Build the error message $message = $this->_build_error_msg($line, $this->_translate_fieldname($row['label'])); // Save the error message $this->_field_data[$row['field']]['error'] = $message; if ( ! isset($this->_error_array[$row['field']])) { $this->_error_array[$row['field']] = $message; } } return; } // -------------------------------------------------------------------- // Cycle through each rule and run it foreach ($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; } // 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 = $match[2]; } // Call the function that corresponds to the rule if ($callback OR $callable) { if ($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, $param) : $rule($postdata, $param); } // Re-assign the result to the master data array if ($_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; } // If the field isn't required and we just processed a callback we'll move on... if ( ! in_array('required', $rules, TRUE) && $result !== FALSE) { continue; } } elseif ( ! method_exists($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 don't have named error messages if ( ! is_callable($rule)) { // Check if a custom message is defined if (isset($this->_field_data[$row['field']]['errors'][$rule])) { $line = $this->_field_data[$row['field']]['errors'][$rule]; } elseif ( ! isset($this->_error_messages[$rule])) { if (FALSE === ($line = $this->CI->lang->line('form_validation_'.$rule)) // DEPRECATED support for non-prefixed keys && FALSE === ($line = $this->CI->lang->line($rule, FALSE))) { $line = 'Unable to access an error message corresponding to your field name.'; } } else { $line = $this->_error_messages[$rule]; } } // 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']] = $message; } return; } } } // -------------------------------------------------------------------- /** * Translate a field name * * @param string the field name * @return string */ protected function _translate_fieldname($fieldname) { // Do we need to translate the field name? // We look for the prefix lang: to determine this if (sscanf($fieldname, 'lang:%s', $line) === 1) { // Were we able to translate the field name? If not we use $line if (FALSE === ($fieldname = $this->CI->lang->line('form_validation_'.$line)) // DEPRECATED support for non-prefixed keys && 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($str) ? (bool) count($str) : (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 (MB_ENABLED === TRUE) ? ($val <= mb_strlen($str)) : ($val <= strlen($str)); } // -------------------------------------------------------------------- /** * Max Length * * @param string * @param string * @return bool */ public function max_length($str, $val) { if ( ! is_numeric($val)) { return FALSE; } return (MB_ENABLED === TRUE) ? ($val >= mb_strlen($str)) : ($val >= strlen($str)); } // -------------------------------------------------------------------- /** * Exact Length * * @param string * @param string * @return bool */ public function exact_length($str, $val) { if ( ! is_numeric($val)) { return FALSE; } return (MB_ENABLED === TRUE) ? (mb_strlen($str) === (int) $val) : (strlen($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($matches[1], array('http', 'https'), TRUE)) { return FALSE; } $str = $matches[2]; } $str = 'http://'.$str; // There's a bug affecting PHP 5.2.13, 5.3.2 that considers the // underscore to be a valid hostname character instead of a dash. // Reference: https://bugs.php.net/bug.php?id=51192 if (version_compare(PHP_VERSION, '5.2.13', '==') OR version_compare(PHP_VERSION, '5.3.2', '==')) { sscanf($str, 'http://%[^/]', $host); $str = substr_replace($str, strtr($host, array('_' => '-', '-' => '_')), 7, strlen($host)); } return (filter_var($str, FILTER_VALIDATE_URL) !== FALSE); } // -------------------------------------------------------------------- /** * Valid Email * * @param string * @return bool */ public function valid_email($str) { if (function_exists('idn_to_ascii') && $atpos = strpos($email, '@')) { $email = substr($email, 0, ++$atpos).idn_to_ascii(substr($email, $atpos)); } return (bool) filter_var($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, $which); } // -------------------------------------------------------------------- /** * Alpha * * @param string * @return bool */ public function alpha($str) { return ctype_alpha($str); } // -------------------------------------------------------------------- /** * Alpha-numeric * * @param string * @return bool */ public function alpha_numeric($str) { return ctype_alnum((string) $str); } // -------------------------------------------------------------------- /** * Alpha-numeric w/ spaces * * @param string * @return bool */ public function alpha_numeric_spaces($str) { return (bool) preg_match('/^[A-Z0-9 ]+$/i', $str); } // -------------------------------------------------------------------- /** * Alpha-numeric with underscores and dashes * * @param string * @return bool */ public function alpha_dash($str) { return (bool) preg_match('/^[a-z0-9_-]+$/i', $str); } // -------------------------------------------------------------------- /** * Numeric * * @param string * @return bool */ public function numeric($str) { return (bool) preg_match('/^[\-+]?[0-9]*\.?[0-9]+$/', $str); } // -------------------------------------------------------------------- /** * Integer * * @param string * @return bool */ public function integer($str) { return (bool) preg_match('/^[\-+]?[0-9]+$/', $str); } // -------------------------------------------------------------------- /** * Decimal number * * @param string * @return bool */ public function decimal($str) { return (bool) preg_match('/^[\-+]?[0-9]+\.[0-9]+$/', $str); } // -------------------------------------------------------------------- /** * Greater than * * @param string * @param int * @return bool */ public function greater_than($str, $min) { return is_numeric($str) ? ($str > $min) : FALSE; } // -------------------------------------------------------------------- /** * Equal to or Greater than * * @param string * @param int * @return bool */ public function greater_than_equal_to($str, $min) { return is_numeric($str) ? ($str >= $min) : FALSE; } // -------------------------------------------------------------------- /** * Less than * * @param string * @param int * @return bool */ public function less_than($str, $max) { return is_numeric($str) ? ($str < $max) : FALSE; } // -------------------------------------------------------------------- /** * Equal to or Less than * * @param string * @param int * @return bool */ public function less_than_equal_to($str, $max) { return is_numeric($str) ? ($str <= $max) : FALSE; } // -------------------------------------------------------------------- /** * Is a Natural number (0,1,2,3, etc.) * * @param string * @return bool */ public function is_natural($str) { return ctype_digit((string) $str); } // -------------------------------------------------------------------- /** * Is a Natural number, but not a zero (1,2,3, etc.) * * @param string * @return bool */ public function is_natural_no_zero($str) { return ($str != 0 && ctype_digit((string) $str)); } // -------------------------------------------------------------------- /** * Valid Base64 * * Tests a string for characters outside of the Base64 alphabet * as defined by RFC 2045 http://www.faqs.org/rfcs/rfc2045 * * @param string * @return bool */ public function valid_base64($str) { return (base64_encode(base64_decode($str)) === $str); } // -------------------------------------------------------------------- /** * Prep data for form * * This function allows HTML to be safely shown in a form. * Special characters are converted. * * @param string * @return string */ public function prep_for_form($data = '') { if ($this->_safe_form_data === FALSE OR empty($data)) { return $data; } if (is_array($data)) { foreach ($data as $key => $val) { $data[$key] = $this->prep_for_form($val); } return $data; } return str_replace(array("'", '"', '<', '>'), array(''', '"', '<', '>'), stripslashes($data)); } // -------------------------------------------------------------------- /** * Prep URL * * @param string * @return string */ public function prep_url($str = '') { if ($str === 'http://' OR $str === '') { return ''; } if (strpos($str, 'http://') !== 0 && strpos($str, 'https://') !== 0) { return 'http://'.$str; } return $str; } // -------------------------------------------------------------------- /** * Strip Image Tags * * @param string * @return string */ public function strip_image_tags($str) { return $this->CI->security->strip_image_tags($str); } // -------------------------------------------------------------------- /** * XSS Clean * * @param string * @return string */ public function xss_clean($str) { return $this->CI->security->xss_clean($str); } // -------------------------------------------------------------------- /** * Convert PHP tags to entities * * @param string * @return string */ public function encode_php_tags($str) { return str_replace(array(''), array('<?', '?>'), $str); } // -------------------------------------------------------------------- /** * Reset validation vars * * Prevents subsequent validation routines from being affected by the * results of any previous validation routine due to the CI singleton. * * @return CI_Form_validation */ public function reset_validation() { $this->_field_data = array(); $this->_config_rules = array(); $this->_error_array = array(); $this->_error_messages = array(); $this->error_string = ''; return $this; } } /* End of file Form_validation.php */ /* Location: ./system/libraries/Form_validation.php */