/
Form_validation.php
1381 lines (1188 loc) · 28.8 KB
/
Form_validation.php
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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Form Validation Class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Validation
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/libraries/form_validation.html
*/
class CI_Form_validation {
protected $CI;
protected $_field_data = array();
protected $_config_rules = array();
protected $_error_array = array();
protected $_error_messages = array();
protected $_error_prefix = '<p>';
protected $_error_suffix = '</p>';
protected $error_string = '';
protected $_safe_form_data = FALSE;
/**
* Constructor
*/
public function __construct($rules = array())
{
$this->CI =& get_instance();
// Validation rules can be stored in a config file.
$this->_config_rules = $rules;
// Automatically load the form helper
$this->CI->load->helper('form');
// Set the character encoding in MB.
if (function_exists('mb_internal_encoding'))
{
mb_internal_encoding($this->CI->config->item('charset'));
}
log_message('debug', "Form Validation Class Initialized");
}
// --------------------------------------------------------------------
/**
* Set Rules
*
* This function takes an array of field names and validation
* rules as input, validates the info, and stores it
*
* @access public
* @param mixed
* @param string
* @return void
*/
public function set_rules($field, $label = '', $rules = '')
{
// No reason to set rules if we have no POST data
if (count($_POST) == 0)
{
return $this;
}
// If an array was passed via the first parameter instead of indidual string
// values we cycle through it and recursively call this function.
if (is_array($field))
{
foreach ($field as $row)
{
// Houston, we have a problem...
if ( ! isset($row['field']) OR ! isset($row['rules']))
{
continue;
}
// If the field label wasn't passed we use the field name
$label = ( ! isset($row['label'])) ? $row['field'] : $row['label'];
// Here we go!
$this->set_rules($row['field'], $label, $row['rules']);
}
return $this;
}
// No fields? Nothing to do...
if ( ! is_string($field) OR ! is_string($rules) OR $field == '')
{
return $this;
}
// If the field label wasn't passed we use the field name
$label = ($label == '') ? $field : $label;
// Is the field name an array? We test for the existence of a bracket "[" in
// the field name to determine this. If it is an array, we break it apart
// into its components so that we can fetch the corresponding POST data later
if (strpos($field, '[') !== FALSE AND preg_match_all('/\[(.*?)\]/', $field, $matches))
{
// Note: Due to a bug in current() that affects some versions
// of PHP we can not pass function call directly into it
$x = explode('[', $field);
$indexes[] = current($x);
for ($i = 0; $i < count($matches['0']); $i++)
{
if ($matches['1'][$i] != '')
{
$indexes[] = $matches['1'][$i];
}
}
$is_array = TRUE;
}
else
{
$indexes = array();
$is_array = FALSE;
}
// Build our master array
$this->_field_data[$field] = array(
'field' => $field,
'label' => $label,
'rules' => $rules,
'is_array' => $is_array,
'keys' => $indexes,
'postdata' => NULL,
'error' => ''
);
return $this;
}
// --------------------------------------------------------------------
/**
* Set Error Message
*
* Lets users set their own error messages on the fly. Note: The key
* name has to match the function name that it corresponds to.
*
* @access public
* @param string
* @param string
* @return string
*/
public function set_message($lang, $val = '')
{
if ( ! is_array($lang))
{
$lang = array($lang => $val);
}
$this->_error_messages = array_merge($this->_error_messages, $lang);
return $this;
}
// --------------------------------------------------------------------
/**
* Set The Error Delimiter
*
* Permits a prefix/suffix to be added to each error message
*
* @access public
* @param string
* @param string
* @return void
*/
public function set_error_delimiters($prefix = '<p>', $suffix = '</p>')
{
$this->_error_prefix = $prefix;
$this->_error_suffix = $suffix;
return $this;
}
// --------------------------------------------------------------------
/**
* Get Error Message
*
* Gets the error message associated with a particular field
*
* @access public
* @param string the field name
* @return void
*/
public function error($field = '', $prefix = '', $suffix = '')
{
if ( ! isset($this->_field_data[$field]['error']) OR $this->_field_data[$field]['error'] == '')
{
return '';
}
if ($prefix == '')
{
$prefix = $this->_error_prefix;
}
if ($suffix == '')
{
$suffix = $this->_error_suffix;
}
return $prefix.$this->_field_data[$field]['error'].$suffix;
}
// --------------------------------------------------------------------
/**
* Error String
*
* Returns the error messages as a string, wrapped in the error delimiters
*
* @access public
* @param string
* @param string
* @return str
*/
public function error_string($prefix = '', $suffix = '')
{
// No errrors, validation passes!
if (count($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 $str;
}
// --------------------------------------------------------------------
/**
* Run the Validator
*
* This function does all the work.
*
* @access public
* @return bool
*/
public function run($group = '')
{
// Do we even have any data to process? Mm?
if (count($_POST) == 0)
{
return FALSE;
}
// Does the _field_data array containing the validation rules exist?
// If not, we look to see if they were assigned via a config file
if (count($this->_field_data) == 0)
{
// No validation rules? We're done...
if (count($this->_config_rules) == 0)
{
return FALSE;
}
// Is there a validation rule for the particular URI being accessed?
$uri = ($group == '') ? trim($this->CI->uri->ruri_string(), '/') : $group;
if ($uri != '' AND isset($this->_config_rules[$uri]))
{
$this->set_rules($this->_config_rules[$uri]);
}
else
{
$this->set_rules($this->_config_rules);
}
// We're 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, match the
// corresponding $_POST item and test for errors
foreach ($this->_field_data as $field => $row)
{
// Fetch the data from the corresponding $_POST array and cache it in the _field_data array.
// Depending on whether the field name is an array or a string will determine where we get it from.
if ($row['is_array'] == TRUE)
{
$this->_field_data[$field]['postdata'] = $this->_reduce_array($_POST, $row['keys']);
}
else
{
if (isset($_POST[$field]) AND $_POST[$field] != "")
{
$this->_field_data[$field]['postdata'] = $_POST[$field];
}
}
$this->_execute($row, explode('|', $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
$this->_reset_post_array();
// No errors, validation passes!
if ($total_errors == 0)
{
return TRUE;
}
// Validation fails
return FALSE;
}
// --------------------------------------------------------------------
/**
* Traverse a multidimensional $_POST array index until the data is found
*
* @access private
* @param array
* @param array
* @param integer
* @return mixed
*/
protected function _reduce_array($array, $keys, $i = 0)
{
if (is_array($array))
{
if (isset($keys[$i]))
{
if (isset($array[$keys[$i]]))
{
$array = $this->_reduce_array($array[$keys[$i]], $keys, ($i+1));
}
else
{
return NULL;
}
}
else
{
return $array;
}
}
return $array;
}
// --------------------------------------------------------------------
/**
* Re-populate the _POST array with our finalized and processed data
*
* @access private
* @return null
*/
protected function _reset_post_array()
{
foreach ($this->_field_data as $field => $row)
{
if ( ! is_null($row['postdata']))
{
if ($row['is_array'] == FALSE)
{
if (isset($_POST[$row['field']]))
{
$_POST[$row['field']] = $this->prep_for_form($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] = $this->prep_for_form($v);
}
$post_ref = $array;
}
else
{
$post_ref = $this->prep_for_form($row['postdata']);
}
}
}
}
}
// --------------------------------------------------------------------
/**
* Executes the Validation routines
*
* @access private
* @param array
* @param array
* @param mixed
* @param integer
* @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, $cycles);
$cycles++;
}
return;
}
// --------------------------------------------------------------------
// If the field is blank, but NOT required, no further tests are necessary
$callback = FALSE;
if ( ! in_array('required', $rules) AND is_null($postdata))
{
// Before we bail out, does the rule contain a callback?
if (preg_match("/(callback_\w+(\[.*?\])?)/", implode(' ', $rules), $match))
{
$callback = TRUE;
$rules = (array('1' => $match[1]));
}
else
{
return;
}
}
// --------------------------------------------------------------------
// Isset Test. Typically this rule will only apply to checkboxes.
if (is_null($postdata) AND $callback == FALSE)
{
if (in_array('isset', $rules, TRUE) OR in_array('required', $rules))
{
// Set the message type
$type = (in_array('required', $rules)) ? 'required' : 'isset';
if ( ! isset($this->_error_messages[$type]))
{
if (FALSE === ($line = $this->CI->lang->line($type)))
{
$line = 'The field was not set';
}
}
else
{
$line = $this->_error_messages[$type];
}
// Build the error message
$message = sprintf($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 AND 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
{
$postdata = $this->_field_data[$row['field']]['postdata'];
}
// --------------------------------------------------------------------
// Is the rule a callback?
$callback = FALSE;
if (substr($rule, 0, 9) == 'callback_')
{
$rule = substr($rule, 9);
$callback = TRUE;
}
// Strip the parameter (if exists) from the rule
// Rules can contain a parameter: max_length[5]
$param = FALSE;
if (preg_match("/(.*?)\[(.*)\]/", $rule, $match))
{
$rule = $match[1];
$param = $match[2];
}
// Call the function that corresponds to the rule
if ($callback === TRUE)
{
if ( ! method_exists($this->CI, $rule))
{
continue;
}
// Run the function and grab the result
$result = $this->CI->$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) AND $result !== FALSE)
{
continue;
}
}
else
{
if ( ! method_exists($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))
{
$result = $rule($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);
}
continue;
}
$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)
{
if ( ! isset($this->_error_messages[$rule]))
{
if (FALSE === ($line = $this->CI->lang->line($rule)))
{
$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]) AND isset($this->_field_data[$param]['label']))
{
$param = $this->_translate_fieldname($this->_field_data[$param]['label']);
}
// Build the error message
$message = sprintf($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']] = $message;
}
return;
}
}
}
// --------------------------------------------------------------------
/**
* Translate a field name
*
* @access private
* @param string the field name
* @return string
*/
protected function _translate_fieldname($fieldname)
{
// Do we need to translate the field name?
// We look for the prefix lang: to determine this
if (substr($fieldname, 0, 5) == 'lang:')
{
// Grab the variable
$line = substr($fieldname, 5);
// Were we able to translate the field name? If not we use $line
if (FALSE === ($fieldname = $this->CI->lang->line($line)))
{
return $line;
}
}
return $fieldname;
}
// --------------------------------------------------------------------
/**
* Get the value from a form
*
* Permits you to repopulate a form field with the value it was submitted
* with, or, if that value doesn't exist, with the default
*
* @access public
* @param string the field name
* @param string
* @return void
*/
public function set_value($field = '', $default = '')
{
if ( ! isset($this->_field_data[$field]))
{
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
*
* @access public
* @param string
* @param string
* @return string
*/
public function set_select($field = '', $value = '', $default = FALSE)
{
if ( ! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata']))
{
if ($default === TRUE AND count($this->_field_data) === 0)
{
return ' selected="selected"';
}
return '';
}
$field = $this->_field_data[$field]['postdata'];
if (is_array($field))
{
if ( ! in_array($value, $field))
{
return '';
}
}
else
{
if (($field == '' OR $value == '') OR ($field != $value))
{
return '';
}
}
return ' selected="selected"';
}
// --------------------------------------------------------------------
/**
* Set Radio
*
* Enables radio buttons to be set to the value the user
* selected in the event of an error
*
* @access public
* @param string
* @param string
* @return string
*/
public function set_radio($field = '', $value = '', $default = FALSE)
{
if ( ! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata']))
{
if ($default === TRUE AND count($this->_field_data) === 0)
{
return ' checked="checked"';
}
return '';
}
$field = $this->_field_data[$field]['postdata'];
if (is_array($field))
{
if ( ! in_array($value, $field))
{
return '';
}
}
else
{
if (($field == '' OR $value == '') OR ($field != $value))
{
return '';
}
}
return ' checked="checked"';
}
// --------------------------------------------------------------------
/**
* Set Checkbox
*
* Enables checkboxes to be set to the value the user
* selected in the event of an error
*
* @access public
* @param string
* @param string
* @return string
*/
public function set_checkbox($field = '', $value = '', $default = FALSE)
{
if ( ! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata']))
{
if ($default === TRUE AND count($this->_field_data) === 0)
{
return ' checked="checked"';
}
return '';
}
$field = $this->_field_data[$field]['postdata'];
if (is_array($field))
{
if ( ! in_array($value, $field))
{
return '';
}
}
else
{
if (($field == '' OR $value == '') OR ($field != $value))
{
return '';
}
}
return ' checked="checked"';
}
// --------------------------------------------------------------------
/**
* Required
*
* @access public
* @param string
* @return bool
*/
public function required($str)
{
if ( ! is_array($str))
{
return (trim($str) == '') ? FALSE : TRUE;
}
else
{
return ( ! empty($str));
}
}
// --------------------------------------------------------------------
/**
* Performs a Regular Expression match test.
*
* @access public
* @param string
* @param regex
* @return bool
*/
public function regex_match($str, $regex)
{
if ( ! preg_match($regex, $str))
{
return FALSE;
}
return TRUE;
}
// --------------------------------------------------------------------
/**
* Match one field to another
*
* @access public
* @param string
* @param field
* @return bool
*/
public function matches($str, $field)
{
if ( ! isset($_POST[$field]))
{
return FALSE;
}
$field = $_POST[$field];
return ($str !== $field) ? FALSE : TRUE;
}
// --------------------------------------------------------------------
/**
* Match one field to another
*
* @access public
* @param string
* @param field
* @return bool
*/
public function is_unique($str, $field)
{
list($table, $field)=explode('.', $field);
$query = $this->CI->db->limit(1)->get_where($table, array($field => $str));
return $query->num_rows() === 0;
}
// --------------------------------------------------------------------
/**
* Minimum Length
*
* @access public
* @param string
* @param value
* @return bool
*/
public function min_length($str, $val)
{
if (preg_match("/[^0-9]/", $val))
{
return FALSE;
}
if (function_exists('mb_strlen'))
{
return (mb_strlen($str) < $val) ? FALSE : TRUE;
}
return (strlen($str) < $val) ? FALSE : TRUE;
}
// --------------------------------------------------------------------
/**
* Max Length
*
* @access public
* @param string
* @param value
* @return bool
*/
public function max_length($str, $val)
{
if (preg_match("/[^0-9]/", $val))
{
return FALSE;
}