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-rw-r--r--system/libraries/Validation.php875
-rw-r--r--user_guide/changelog.html11
-rw-r--r--user_guide/libraries/validation.html740
3 files changed, 6 insertions, 1620 deletions
diff --git a/system/libraries/Validation.php b/system/libraries/Validation.php
deleted file mode 100644
index a42b7760b..000000000
--- a/system/libraries/Validation.php
+++ /dev/null
@@ -1,875 +0,0 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 4.3.2 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/**
- * Validation Class
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Validation
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/libraries/validation.html
- */
-class CI_Validation {
-
- var $CI;
- var $error_string = '';
- var $_error_array = array();
- var $_rules = array();
- var $_fields = array();
- var $_error_messages = array();
- var $_current_field = '';
- var $_safe_form_data = FALSE;
- var $_error_prefix = '<p>';
- var $_error_suffix = '</p>';
-
-
-
- /**
- * Constructor
- *
- */
- function CI_Validation()
- {
- $this->CI =& get_instance();
-
- if (function_exists('mb_internal_encoding'))
- {
- mb_internal_encoding($this->CI->config->item('charset'));
- }
-
- log_message('debug', "Validation Class Initialized");
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Fields
- *
- * This function takes an array of field names as input
- * and generates class variables with the same name, which will
- * either be blank or contain the $_POST value corresponding to it
- *
- * @access public
- * @param string
- * @param string
- * @return void
- */
- function set_fields($data = '', $field = '')
- {
- if ($data == '')
- {
- if (count($this->_fields) == 0)
- {
- return FALSE;
- }
- }
- else
- {
- if ( ! is_array($data))
- {
- $data = array($data => $field);
- }
-
- if (count($data) > 0)
- {
- $this->_fields = $data;
- }
- }
-
- foreach($this->_fields as $key => $val)
- {
- $this->$key = ( ! isset($_POST[$key])) ? '' : $this->prep_for_form($_POST[$key]);
-
- $error = $key.'_error';
- if ( ! isset($this->$error))
- {
- $this->$error = '';
- }
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Rules
- *
- * This function takes an array of field names and validation
- * rules as input ad simply stores is for use later.
- *
- * @access public
- * @param mixed
- * @param string
- * @return void
- */
- function set_rules($data, $rules = '')
- {
- if ( ! is_array($data))
- {
- if ($rules == '')
- return;
-
- $data = array($data => $rules);
- }
-
- foreach ($data as $key => $val)
- {
- $this->_rules[$key] = $val;
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Error Message
- *
- * Lets users set their own error messages on the fly. Note: The key
- * name has to match the function name that it corresponds to.
- *
- * @access public
- * @param string
- * @param string
- * @return string
- */
- function set_message($lang, $val = '')
- {
- if ( ! is_array($lang))
- {
- $lang = array($lang => $val);
- }
-
- $this->_error_messages = array_merge($this->_error_messages, $lang);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set The Error Delimiter
- *
- * Permits a prefix/suffix to be added to each error message
- *
- * @access public
- * @param string
- * @param string
- * @return void
- */
- function set_error_delimiters($prefix = '<p>', $suffix = '</p>')
- {
- $this->_error_prefix = $prefix;
- $this->_error_suffix = $suffix;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Run the Validator
- *
- * This function does all the work.
- *
- * @access public
- * @return bool
- */
- function run()
- {
- // Do we even have any data to process? Mm?
- if (count($_POST) == 0 OR count($this->_rules) == 0)
- {
- return FALSE;
- }
-
- // Load the language file containing error messages
- $this->CI->lang->load('validation');
-
- // Cycle through the rules and test for errors
- foreach ($this->_rules as $field => $rules)
- {
- //Explode out the rules!
- $ex = explode('|', $rules);
-
- // Is the field required? If not, if the field is blank we'll move on to the next test
- if ( ! in_array('required', $ex, TRUE))
- {
- if ( ! isset($_POST[$field]) OR $_POST[$field] == '')
- {
- continue;
- }
- }
-
- /*
- * Are we dealing with an "isset" rule?
- *
- * Before going further, we'll see if one of the rules
- * is to check whether the item is set (typically this
- * applies only to checkboxes). If so, we'll
- * test for it here since there's not reason to go
- * further
- */
- if ( ! isset($_POST[$field]))
- {
- if (in_array('isset', $ex, TRUE) OR in_array('required', $ex))
- {
- if ( ! isset($this->_error_messages['isset']))
- {
- if (FALSE === ($line = $this->CI->lang->line('isset')))
- {
- $line = 'The field was not set';
- }
- }
- else
- {
- $line = $this->_error_messages['isset'];
- }
-
- // Build the error message
- $mfield = ( ! isset($this->_fields[$field])) ? $field : $this->_fields[$field];
- $message = sprintf($line, $mfield);
-
- // Set the error variable. Example: $this->username_error
- $error = $field.'_error';
- $this->$error = $this->_error_prefix.$message.$this->_error_suffix;
- $this->_error_array[] = $message;
- }
-
- continue;
- }
-
- /*
- * Set the current field
- *
- * The various prepping functions need to know the
- * current field name so they can do this:
- *
- * $_POST[$this->_current_field] == 'bla bla';
- */
- $this->_current_field = $field;
-
- // Cycle through the rules!
- foreach ($ex As $rule)
- {
- // 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;
- }
-
- $result = $this->CI->$rule($_POST[$field], $param);
-
- // If the field isn't required and we just processed a callback we'll move on...
- if ( ! in_array('required', $ex, TRUE) AND $result !== FALSE)
- {
- continue 2;
- }
-
- }
- else
- {
- if ( ! method_exists($this, $rule))
- {
- /*
- * Run the native PHP function if called for
- *
- * If our own wrapper function doesn't exist we see
- * if a native PHP function does. Users can use
- * any native PHP function call that has one param.
- */
- if (function_exists($rule))
- {
- $_POST[$field] = $rule($_POST[$field]);
- $this->$field = $_POST[$field];
- }
-
- continue;
- }
-
- $result = $this->$rule($_POST[$field], $param);
- }
-
- // Did the rule test negatively? If so, grab the error.
- if ($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];
- }
-
- // Build the error message
- $mfield = ( ! isset($this->_fields[$field])) ? $field : $this->_fields[$field];
- $mparam = ( ! isset($this->_fields[$param])) ? $param : $this->_fields[$param];
- $message = sprintf($line, $mfield, $mparam);
-
- // Set the error variable. Example: $this->username_error
- $error = $field.'_error';
- $this->$error = $this->_error_prefix.$message.$this->_error_suffix;
-
- // Add the error to the error array
- $this->_error_array[] = $message;
- continue 2;
- }
- }
-
- }
-
- $total_errors = count($this->_error_array);
-
- /*
- * Recompile the class variables
- *
- * If any prepping functions were called the $_POST data
- * might now be different then the corresponding class
- * variables so we'll set them anew.
- */
- if ($total_errors > 0)
- {
- $this->_safe_form_data = TRUE;
- }
-
- $this->set_fields();
-
- // Did we end up with any errors?
- if ($total_errors == 0)
- {
- return TRUE;
- }
-
- // Generate the error string
- foreach ($this->_error_array as $val)
- {
- $this->error_string .= $this->_error_prefix.$val.$this->_error_suffix."\n";
- }
-
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Required
- *
- * @access public
- * @param string
- * @return bool
- */
- function required($str)
- {
- if ( ! is_array($str))
- {
- return (trim($str) == '') ? FALSE : TRUE;
- }
- else
- {
- return ( ! empty($str));
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Match one field to another
- *
- * @access public
- * @param string
- * @param field
- * @return bool
- */
- function matches($str, $field)
- {
- if ( ! isset($_POST[$field]))
- {
- return FALSE;
- }
-
- return ($str !== $_POST[$field]) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Minimum Length
- *
- * @access public
- * @param string
- * @param value
- * @return bool
- */
- 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) < $val) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Max Length
- *
- * @access public
- * @param string
- * @param value
- * @return bool
- */
- function max_length($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) > $val) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Exact Length
- *
- * @access public
- * @param string
- * @param value
- * @return bool
- */
- function exact_length($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) != $val) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Valid Email
- *
- * @access public
- * @param string
- * @return bool
- */
- function valid_email($str)
- {
- return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Valid Emails
- *
- * @access public
- * @param string
- * @return bool
- */
- function valid_emails($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
- *
- * @access public
- * @param string
- * @return string
- */
- function valid_ip($ip)
- {
- return $this->CI->input->valid_ip($ip);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Alpha
- *
- * @access public
- * @param string
- * @return bool
- */
- function alpha($str)
- {
- return ( ! preg_match("/^([a-z])+$/i", $str)) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Alpha-numeric
- *
- * @access public
- * @param string
- * @return bool
- */
- function alpha_numeric($str)
- {
- return ( ! preg_match("/^([a-z0-9])+$/i", $str)) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Alpha-numeric with underscores and dashes
- *
- * @access public
- * @param string
- * @return bool
- */
- function alpha_dash($str)
- {
- return ( ! preg_match("/^([-a-z0-9_-])+$/i", $str)) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Numeric
- *
- * @access public
- * @param string
- * @return bool
- */
- function numeric($str)
- {
- return (bool)preg_match( '/^[\-+]?[0-9]*\.?[0-9]+$/', $str);
-
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Is Numeric
- *
- * @access public
- * @param string
- * @return bool
- */
- function is_numeric($str)
- {
- return ( ! is_numeric($str)) ? FALSE : TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Integer
- *
- * @access public
- * @param string
- * @return bool
- */
- function integer($str)
- {
- return (bool)preg_match( '/^[\-+]?[0-9]+$/', $str);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Is a Natural number (0,1,2,3, etc.)
- *
- * @access public
- * @param string
- * @return bool
- */
- function is_natural($str)
- {
- return (bool)preg_match( '/^[0-9]+$/', $str);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Is a Natural number, but not a zero (1,2,3, etc.)
- *
- * @access public
- * @param string
- * @return bool
- */
- function is_natural_no_zero($str)
- {
- if ( ! preg_match( '/^[0-9]+$/', $str))
- {
- return FALSE;
- }
-
- if ($str == 0)
- {
- return FALSE;
- }
-
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Valid Base64
- *
- * Tests a string for characters outside of the Base64 alphabet
- * as defined by RFC 2045 http://www.faqs.org/rfcs/rfc2045
- *
- * @access public
- * @param string
- * @return bool
- */
- function valid_base64($str)
- {
- return (bool) ! preg_match('/[^a-zA-Z0-9\/\+=]/', $str);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Select
- *
- * Enables pull-down lists to be set to the value the user
- * selected in the event of an error
- *
- * @access public
- * @param string
- * @param string
- * @return string
- */
- function set_select($field = '', $value = '')
- {
- if ($field == '' OR $value == '' OR ! isset($_POST[$field]))
- {
- return '';
- }
-
- if ($_POST[$field] == $value)
- {
- return ' selected="selected"';
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Radio
- *
- * Enables radio buttons to be set to the value the user
- * selected in the event of an error
- *
- * @access public
- * @param string
- * @param string
- * @return string
- */
- function set_radio($field = '', $value = '')
- {
- if ($field == '' OR $value == '' OR ! isset($_POST[$field]))
- {
- return '';
- }
-
- if ($_POST[$field] == $value)
- {
- return ' checked="checked"';
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Checkbox
- *
- * Enables checkboxes to be set to the value the user
- * selected in the event of an error
- *
- * @access public
- * @param string
- * @param string
- * @return string
- */
- function set_checkbox($field = '', $value = '')
- {
- if ($field == '' OR $value == '' OR ! isset($_POST[$field]))
- {
- return '';
- }
-
- if ($_POST[$field] == $value)
- {
- return ' checked="checked"';
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep data for form
- *
- * This function allows HTML to be safely shown in a form.
- * Special characters are converted.
- *
- * @access public
- * @param string
- * @return string
- */
- function prep_for_form($data = '')
- {
- if (is_array($data))
- {
- foreach ($data as $key => $val)
- {
- $data[$key] = $this->prep_for_form($val);
- }
-
- return $data;
- }
-
- if ($this->_safe_form_data == FALSE OR $data == '')
- {
- return $data;
- }
-
- return str_replace(array("'", '"', '<', '>'), array("&#39;", "&quot;", '&lt;', '&gt;'), stripslashes($data));
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep URL
- *
- * @access public
- * @param string
- * @return string
- */
- function prep_url($str = '')
- {
- if ($str == 'http://' OR $str == '')
- {
- $_POST[$this->_current_field] = '';
- return;
- }
-
- if (substr($str, 0, 7) != 'http://' && substr($str, 0, 8) != 'https://')
- {
- $str = 'http://'.$str;
- }
-
- $_POST[$this->_current_field] = $str;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Strip Image Tags
- *
- * @access public
- * @param string
- * @return string
- */
- function strip_image_tags($str)
- {
- $_POST[$this->_current_field] = $this->CI->input->strip_image_tags($str);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * XSS Clean
- *
- * @access public
- * @param string
- * @return string
- */
- function xss_clean($str)
- {
- $_POST[$this->_current_field] = $this->CI->input->xss_clean($str);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Convert PHP tags to entities
- *
- * @access public
- * @param string
- * @return string
- */
- function encode_php_tags($str)
- {
- $_POST[$this->_current_field] = str_replace(array('<?php', '<?PHP', '<?', '?>'), array('&lt;?php', '&lt;?PHP', '&lt;?', '?&gt;'), $str);
- }
-
-}
-// END Validation Class
-
-/* End of file Validation.php */
-/* Location: ./system/libraries/Validation.php */ \ No newline at end of file
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 14d173ab8..02cf6d06f 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -74,6 +74,7 @@ Hg Tag: </p>
<li>Added <kbd>$config['directory_trigger']</kbd> to the config file so that a controller sub-directory can be specified when running _GET strings instead of URI segments.</li>
<li>Added ability to set "Package" paths - specific paths where the Loader and Config classes should try to look first for a requested file. This allows distribution of sub-applications with their own libraries, models, config files, etc. in a single "package" directory. See the <a href="libraries/loader.html">Loader class</a> documentation for more details.</li>
<li>In-development code is now hosted at <a href="http://bitbucket.org/ellislab/codeigniter/">BitBucket</a>.</li>
+ <li>Removed the deprecated Validation Class.</li>
</ul>
<li>Libraries
<ul>
@@ -496,7 +497,7 @@ Hg Tag: 1.6.2</p>
<li>The MySQLi forge class is now in sync with MySQL forge. </li>
<li>Added the ability to set CRLF settings via config in the <a href="libraries/email.html">Email</a> class.</li>
<li><a href="libraries/unit_testing.html">Unit Testing</a> results are now colour coded, and a change was made to the default template of results.</li>
- <li>Added a valid_emails rule to the <a href="libraries/validation.html">Validation</a> class.</li>
+ <li>Added a valid_emails rule to the Validation class.</li>
<li>The <a href="libraries/zip.html">Zip class</a> now exits within <kbd>download()</kbd>.</li>
<li>The <a href="libraries/zip.html">Zip class</a> has undergone a substantial re-write for speed and clarity (thanks stanleyxu for the hard work and code contribution in bug report #3425!)</li>
</ul>
@@ -682,8 +683,8 @@ Hg Tag: 1.6.1</p>
<li>Removed 'last_visit' from the Session class.</li>
<li>Added a language entry for valid_ip validation error.</li>
<li>Modified prep_for_form() in the Validation class to accept arrays, adding support for POST array validation (via callbacks only)</li>
- <li>Added an &quot;integer&quot; rule into the <a href="./libraries/validation.html">Validation</a> library.</li>
- <li>Added valid_base64() to the <a href="./libraries/validation.html">Validation</a> library.</li>
+ <li>Added an &quot;integer&quot; rule into the Validation library.</li>
+ <li>Added valid_base64() to the Validation library.</li>
<li>Documented clear() in the <a href="../libraries/image_lib.html">Image Processing</a> library.</li>
<li>Changed the behaviour of custom callbacks so that they no longer trigger the &quot;required&quot; rule. </li>
<li>Modified Upload class $_FILES error messages to be more precise.</li>
@@ -769,8 +770,8 @@ Hg Tag: 1.6.1</p>
<li>Fixed a bug in database driver where num_rows property wasn't getting updated.</li>
<li>Fixed a bug in the <a href="./libraries/file_uploading.html">upload library</a> when allowed_files wasn't defined.</li>
<li>Fixed a bug in <kbd>word_wrap()</kbd> of the Text Helper that incorrectly referenced an object. </li>
- <li>Fixed a bug in <a href="./libraries/validation.html">Validation</a> where <kbd>valid_ip()</kbd> wasn't called properly.</li>
- <li>Fixed a bug in <a href="./libraries/validation.html">Validation</a> where individual error messages for checkboxes wasn't supported.</li>
+ <li>Fixed a bug in Validation where <kbd>valid_ip()</kbd> wasn't called properly.</li>
+ <li>Fixed a bug in Validation where individual error messages for checkboxes wasn't supported.</li>
<li>Fixed a bug in captcha calling an invalid PHP function.</li>
<li>Fixed a bug in the cookie helper "set_cookie" function. It was not honoring the config settings.</li>
<li>Fixed a bug that was making validation callbacks required even when not set as such.</li>
diff --git a/user_guide/libraries/validation.html b/user_guide/libraries/validation.html
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@@ -1,740 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-<head>
-
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<title>Form Validation : CodeIgniter User Guide</title>
-
-<style type='text/css' media='all'>@import url('../userguide.css');</style>
-<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
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-<meta name='description' content='CodeIgniter User Guide' />
-</head>
-<body>
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-<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
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-<div id="masthead">
-<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
-<tr>
-<td><h1>CodeIgniter User Guide Version 2.0.0</h1></td>
-<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
-</tr>
-</table>
-</div>
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-<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
-<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
-Form Validation
-</td>
-<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
-</tr>
-</table>
-<!-- END BREADCRUMB -->
-
-<br clear="all" />
-
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-<!-- START CONTENT -->
-<div id="content">
-
-<p class="important">
- This library has been deprecated. Use of the form_validation library is encouraged.
-</p>
-
-<h1>Form Validation</h1>
-
-<p>Before explaining CodeIgniter's approach to data validation, let's describe the ideal scenario:</p>
-
-<ol>
-<li>A form is displayed.</li>
-<li>You fill it in and submit it.</li>
-<li>If you submitted something invalid, or perhaps missed a required item, the form is redisplayed containing your data along with an error message describing the problem.</li>
-<li>This process continues until you have submitted a valid form.</li>
-</ol>
-
-<p>On the receiving end, the script must:</p>
-
-<ol>
-<li>Check for required data.</li>
-<li>Verify that the data is of the correct type, and meets the correct criteria. (For example, if a username is submitted
-it must be validated to contain only permitted characters. It must be of a minimum length,
-and not exceed a maximum length. The username can't be someone else's existing username, or perhaps even a reserved word. Etc.)</li>
-<li>Sanitize the data for security.</li>
-<li>Pre-format the data if needed (Does the data need to be trimmed? HTML encoded? Etc.)</li>
-<li>Prep the data for insertion in the database.</li>
-</ol>
-
-
-<p>Although there is nothing complex about the above process, it usually requires a significant
-amount of code, and to display error messages, various control structures are usually placed within the form HTML.
-Form validation, while simple to create, is generally very messy and tedious to implement.</p>
-
-<dfn>CodeIgniter provides a comprehensive validation framework that truly minimizes the amount of code you'll write.
-It also removes all control structures from your form HTML, permitting it to be clean and free of code.</dfn>
-
-<h2>Overview</h2>
-
-<p>In order to implement CodeIgniter's form validation you'll need three things:</p>
-
-<ol>
-<li>A <a href="../general/views.html">View</a> file containing the form.</li>
-<li>A View file containing a "success" message to be displayed upon successful submission.</li>
-<li>A <a href="../general/controllers.html">controller</a> function to receive and process the submitted data.</li>
-</ol>
-
-<p>Let's create those three things, using a member sign-up form as the example.</p>
-
-<h2>The Form</h2>
-
-<p>Using a text editor, create a form called <dfn>myform.php</dfn>. In it, place this code and save it to your <samp>applications/views/</samp>
-folder:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="30">&lt;html>
-&lt;head>
-&lt;title>My Form&lt;/title>
-&lt;/head>
-&lt;body>
-
-&lt;?php echo $this->validation->error_string; ?>
-
-&lt;?php echo form_open('form'); ?>
-
-&lt;h5>Username&lt;/h5>
-&lt;input type="text" name="username" value="" size="50" />
-
-&lt;h5>Password&lt;/h5>
-&lt;input type="text" name="password" value="" size="50" />
-
-&lt;h5>Password Confirm&lt;/h5>
-&lt;input type="text" name="passconf" value="" size="50" />
-
-&lt;h5>Email Address&lt;/h5>
-&lt;input type="text" name="email" value="" size="50" />
-
-&lt;div>&lt;input type="submit" value="Submit" />&lt;/div>
-
-&lt;/form>
-
-&lt;/body>
-&lt;/html>
-</textarea>
-
-
-<h2>The Success Page</h2>
-
-
-<p>Using a text editor, create a form called <dfn>formsuccess.php</dfn>. In it, place this code and save it to your <samp>applications/views/</samp>
-folder:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="14">
-&lt;html>
-&lt;head>
-&lt;title>My Form&lt;/title>
-&lt;/head>
-&lt;body>
-
-&lt;h3>Your form was successfully submitted!&lt;/h3>
-
-&lt;p>&lt;?php echo anchor('form', 'Try it again!'); ?>&lt;/p>
-
-&lt;/body>
-&lt;/html>
-</textarea>
-
-
-<h2>The Controller</h2>
-
-<p>Using a text editor, create a controller called <dfn>form.php</dfn>. In it, place this code and save it to your <samp>applications/controllers/</samp>
-folder:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="21">&lt;?php
-
-class Form extends Controller {
-
- function index()
- {
- $this->load->helper(array('form', 'url'));
-
- $this->load->library('validation');
-
- if ($this->validation->run() == FALSE)
- {
- $this->load->view('myform');
- }
- else
- {
- $this->load->view('formsuccess');
- }
- }
-}
-?></textarea>
-
-
-<h2>Try it!</h2>
-
-<p>To try your form, visit your site using a URL similar to this one:</p>
-
-<code>example.com/index.php/<var>form</var>/</code>
-
-<p><strong>If you submit the form you should simply see the form reload. That's because you haven't set up any validation
-rules yet, which we'll get to in a moment.</strong></p>
-
-
-<h2>Explanation</h2>
-
-<p>You'll notice several things about the above pages:</p>
-
-<p>The <dfn>form</dfn> (myform.php) is a standard web form with a couple exceptions:</p>
-
-<ol>
-<li>It uses a <dfn>form helper</dfn> to create the form opening.
-Technically, this isn't necessary. You could create the form using standard HTML. However, the benefit of using the helper
-is that it generates the action URL for you, based on the URL in your config file. This makes your application more portable
-and flexible in the event your URLs change.</li>
-
-<li>At the top of the form you'll notice the following variable:
-<code>&lt;?php echo $this->validation->error_string; ?&gt;</code>
-
-<p>This variable will display any error messages sent back by the validator. If there are no messages it returns nothing.</p>
-</li>
-</ol>
-
-<p>The <dfn>controller</dfn> (form.php) has one function: <dfn>index()</dfn>. This function initializes the validation class and
-loads the <var>form helper</var> and <var>URL helper</var> used by your view files. It also <samp>runs</samp>
-the validation routine. Based on
-whether the validation was successful it either presents the form or the success page.</p>
-
-<p><strong>Since you haven't told the validation class to validate anything yet, it returns "false" (boolean false) by default. The <samp>run()</samp>
-function only returns "true" if it has successfully applied your rules without any of them failing.</strong></p>
-
-
-<h2>Setting Validation Rules</h2>
-
-<p>CodeIgniter lets you set as many validation rules as you need for a given field, cascading them in order, and it even lets you prep and pre-process the field data
-at the same time. Let's see it in action, we'll explain it afterwards.</p>
-
-<p>In your <dfn>controller</dfn> (form.php), add this code just below the validation initialization function:</p>
-
-<code>$rules['username'] = "required";<br />
-$rules['password'] = "required";<br />
-$rules['passconf'] = "required";<br />
-$rules['email'] = "required";<br />
-<br />
-$this->validation->set_rules($rules);</code>
-
-<p>Your controller should now look like this:</p>
-
-<textarea class="textarea" style="width:100%" cols="50" rows="28">&lt;?php
-
-class Form extends Controller {
-
- function index()
- {
- $this->load->helper(array('form', 'url'));
-
- $this->load->library('validation');
-
- $rules['username'] = "required";
- $rules['password'] = "required";
- $rules['passconf'] = "required";
- $rules['email'] = "required";
-
- $this->validation->set_rules($rules);
-
- if ($this->validation->run() == FALSE)
- {
- $this->load->view('myform');
- }
- else
- {
- $this->load->view('formsuccess');
- }
- }
-}
-?></textarea>
-
-<p><dfn>Now submit the form with the fields blank and you should see the error message.
-If you submit the form with all the fields populated you'll see your success page.</dfn></p>
-
-<p class="important"><strong>Note:</strong> The form fields are not yet being re-populated with the data when
-there is an error. We'll get to that shortly, once we're through explaining the validation rules.</p>
-
-
-<h2>Changing the Error Delimiters</h2>
-
-<p>By default, the system adds a paragraph tag (&lt;p&gt;) around each error message shown. You can easily change these delimiters with
-this code, placed in your controller:</p>
-
-<code>$this->validation->set_error_delimiters('<kbd>&lt;div class="error"></kbd>', '<kbd>&lt;/div></kbd>');</code>
-
-<p>In this example, we've switched to using div tags.</p>
-
-<h2>Cascading Rules</h2>
-
-<p>CodeIgniter lets you pipe multiple rules together. Let's try it. Change your rules array like this:</p>
-
-
-<code>$rules['username'] = "required|min_length[5]|max_length[12]";<br />
-$rules['password'] = "required|matches[passconf]";<br />
-$rules['passconf'] = "required";<br />
-$rules['email'] = "required|valid_email";</code>
-
-<p>The above code requires that:</p>
-
-<ol>
-<li>The username field be no shorter than 5 characters and no longer than 12.</li>
-<li>The password field must match the password confirmation field.</li>
-<li>The email field must contain a valid email address.</li>
-</ol>
-
-<p>Give it a try!</p>
-
-<p class="important"><strong>Note:</strong> There are numerous rules available which you can read about in the validation reference.</p>
-
-
-<h2>Prepping Data</h2>
-
-<p>In addition to the validation functions like the ones we used above, you can also prep your data in various ways.
-For example, you can set up rules like this:</p>
-
-<code>$rules['username'] = "<kbd>trim</kbd>|required|min_length[5]|max_length[12]|<kbd>xss_clean</kbd>";<br />
-$rules['password'] = "<kbd>trim</kbd>|required|matches[passconf]|<kbd>md5</kbd>";<br />
-$rules['passconf'] = "<kbd>trim</kbd>|required";<br />
-$rules['email'] = "<kbd>trim</kbd>|required|valid_email";</code>
-
-<p>In the above example, we are "trimming" the fields, converting the password to MD5, and running the username through
-the "xss_clean" function, which removes malicious data.</p>
-
-<p class="important"><strong>Any native PHP function that accepts one parameter can be used as a rule, like <dfn>htmlspecialchars</dfn>,
-<dfn>trim</dfn>, <dfn>MD5</dfn>, etc.</strong></p>
-
-<p><strong>Note:</strong> You will generally want to use the prepping functions <strong>after</strong>
-the validation rules so if there is an error, the original data will be shown in the form.</p>
-
-<h2>Callbacks: Your own Validation Functions</h2>
-
-<p>The validation system supports callbacks to your own validation functions. This permits you to extend the validation class
-to meet your needs. For example, if you need to run a database query to see if the user is choosing a unique username, you can
-create a callback function that does that. Let's create a simple example.</p>
-
-<p>In your controller, change the "username" rule to this:</p>
-
-<code>$rules['username'] = "callback_username_check"; </code>
-
-<p>Then add a new function called <dfn>username_check</dfn> to your controller. Here's how your controller should look:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="44">&lt;?php
-
-class Form extends Controller {
-
- function index()
- {
- $this->load->helper(array('form', 'url'));
-
- $this->load->library('validation');
-
- $rules['username'] = "callback_username_check";
- $rules['password'] = "required";
- $rules['passconf'] = "required";
- $rules['email'] = "required";
-
- $this->validation->set_rules($rules);
-
- if ($this->validation->run() == FALSE)
- {
- $this->load->view('myform');
- }
- else
- {
- $this->load->view('formsuccess');
- }
- }
-
- function username_check($str)
- {
- if ($str == 'test')
- {
- $this->validation->set_message('username_check', 'The %s field can not be the word "test"');
- return FALSE;
- }
- else
- {
- return TRUE;
- }
- }
-
-}
-?></textarea>
-
-<p>Reload your form and submit it with the word "test" as the username. You can see that the form field data was passed to your
-callback function for you to process.</p>
-
-<p><strong>To invoke a callback just put the function name in a rule, with "callback_" as the rule prefix.</strong></p>
-
-<p>The error message was set using the <dfn>$this->validation->set_message</dfn> function.
-Just remember that the message key (the first parameter) must match your function name.</p>
-
-<p class="important"><strong>Note:</strong> You can apply your own custom error messages to any rule, just by setting the
-message similarly. For example, to change the message for the "required" rule you will do this:</p>
-
-<code>$this->validation->set_message('required', 'Your custom message here');</code>
-
-<h2>Re-populating the form</h2>
-
-<p>Thus far we have only been dealing with errors. It's time to repopulate the form field with the submitted data.
-This is done similarly to your rules. Add the following code to your controller, just below your rules:</p>
-
-<code>$fields['username'] = 'Username';<br />
-$fields['password'] = 'Password';<br />
-$fields['passconf'] = 'Password Confirmation';<br />
-$fields['email'] = 'Email Address';<br />
-<br />
-$this->validation->set_fields($fields);</code>
-
-<p>The array keys are the actual names of the form fields, the value represents the full name that you want shown in the
-error message.</p>
-
-<p>The index function of your controller should now look like this:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="30">function index()
-{
- $this->load->helper(array('form', 'url'));
-
- $this->load->library('validation');
-
- $rules['username'] = "required";
- $rules['password'] = "required";
- $rules['passconf'] = "required";
- $rules['email'] = "required";
-
- $this->validation->set_rules($rules);
-
- $fields['username'] = 'Username';
- $fields['password'] = 'Password';
- $fields['passconf'] = 'Password Confirmation';
- $fields['email'] = 'Email Address';
-
- $this->validation->set_fields($fields);
-
- if ($this->validation->run() == FALSE)
- {
- $this->load->view('myform');
- }
- else
- {
- $this->load->view('formsuccess');
- }
-}</textarea>
-
-
-<p>Now open your <dfn>myform.php</dfn> view file and update the value in each field so that it has an attribute corresponding to its name:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="30">
-&lt;html>
-&lt;head>
-&lt;title>My Form&lt;/title>
-&lt;/head>
-&lt;body>
-
-&lt;?php echo $this->validation->error_string; ?>
-
-&lt;?php echo form_open('form'); ?>
-
-&lt;h5>Username&lt;/h5>
-&lt;input type="text" name="username" value="&lt;?php echo $this->validation->username;?>" size="50" />
-
-&lt;h5>Password&lt;/h5>
-&lt;input type="text" name="password" value="&lt;?php echo $this->validation->password;?>" size="50" />
-
-&lt;h5>Password Confirm&lt;/h5>
-&lt;input type="text" name="passconf" value="&lt;?php echo $this->validation->passconf;?>" size="50" />
-
-&lt;h5>Email Address&lt;/h5>
-&lt;input type="text" name="email" value="&lt;?php echo $this->validation->email;?>" size="50" />
-
-&lt;div>&lt;input type="submit" value="Submit" />&lt;/div>
-
-&lt;/form>
-
-&lt;/body>
-&lt;/html>
-</textarea>
-
-
-<p>Now reload your page and submit the form so that it triggers an error. Your form fields should be populated
-and the error messages will contain a more relevant field name.</p>
-
-
-
-<h2>Showing Errors Individually</h2>
-
-<p>If you prefer to show an error message next to each form field, rather than as a list, you can change your form so that it looks like this:</p>
-
-
-<textarea class="textarea" style="width:100%" cols="50" rows="20">
-&lt;h5>Username&lt;/h5>
-&lt;?php echo $this->validation->username_error; ?>
-&lt;input type="text" name="username" value="&lt;?php echo $this->validation->username;?>" size="50" />
-
-&lt;h5>Password&lt;/h5>
-&lt;?php echo $this->validation->password_error; ?>
-&lt;input type="text" name="password" value="&lt;?php echo $this->validation->password;?>" size="50" />
-
-&lt;h5>Password Confirm&lt;/h5>
-&lt;?php echo $this->validation->passconf_error; ?>
-&lt;input type="text" name="passconf" value="&lt;?php echo $this->validation->passconf;?>" size="50" />
-
-&lt;h5>Email Address&lt;/h5>
-&lt;?php echo $this->validation->email_error; ?>
-&lt;input type="text" name="email" value="&lt;?php echo $this->validation->email;?>" size="50" /></textarea>
-
-<p>If there are no errors, nothing will be shown. If there is an error, the message will appear, wrapped in the delimiters you
-have set (&lt;p> tags by default).</p>
-
-<p class="important"><strong>Note: </strong>To display errors this way you must remember to set your fields using the <kbd>$this->validation->set_fields</kbd>
-function described earlier. The errors will be turned into variables that have "_error" after your field name.
-For example, your "username" error will be available at:<br /><dfn>$this->validation->username_error</dfn>.</p>
-
-
-<h2>Rule Reference</h2>
-
-<p>The following is a list of all the native rules that are available to use:</p>
-
-
-
-<table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder">
-<tr>
-<th>Rule</th>
-<th>Parameter</th>
-<th>Description</th>
-<th>Example</th>
-</tr><tr>
-
-<td class="td"><strong>required</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element is empty.</td>
-<td class="td">&nbsp;</td>
-</tr><tr>
-
-<td class="td"><strong>matches</strong></td>
-<td class="td">Yes</td>
-<td class="td">Returns FALSE if the form element does not match the one in the parameter.</td>
-<td class="td">matches[form_item]</td>
-</tr><tr>
-
-<td class="td"><strong>min_length</strong></td>
-<td class="td">Yes</td>
-<td class="td">Returns FALSE if the form element is shorter then the parameter value.</td>
-<td class="td">min_length[6]</td>
-</tr><tr>
-
-<td class="td"><strong>max_length</strong></td>
-<td class="td">Yes</td>
-<td class="td">Returns FALSE if the form element is longer then the parameter value.</td>
-<td class="td">max_length[12]</td>
-</tr><tr>
-
-<td class="td"><strong>exact_length</strong></td>
-<td class="td">Yes</td>
-<td class="td">Returns FALSE if the form element is not exactly the parameter value.</td>
-<td class="td">exact_length[8]</td>
-</tr><tr>
-
-<td class="td"><strong>alpha</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element contains anything other than alphabetical characters.</td>
-<td class="td">&nbsp;</td>
-</tr><tr>
-
-<td class="td"><strong>alpha_numeric</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element contains anything other than alpha-numeric characters.</td>
-<td class="td">&nbsp;</td>
-</tr><tr>
-
-<td class="td"><strong>alpha_dash</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element contains anything other than alpha-numeric characters, underscores or dashes.</td>
-<td class="td">&nbsp;</td>
-</tr>
-<tr>
- <td class="td"><strong>numeric</strong></td>
- <td class="td">No</td>
- <td class="td">Returns FALSE if the form element contains anything other than numeric characters.</td>
- <td class="td">&nbsp;</td>
-</tr>
-<tr>
-
-<td class="td"><strong>integer</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element contains anything other than an integer.</td>
-<td class="td">&nbsp;</td>
-</tr><tr>
-
-<td class="td"><strong>valid_email</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the form element does not contain a valid email address.</td>
-<td class="td">&nbsp;</td>
-</tr>
-<tr>
- <td class="td"><strong>valid_emails</strong></td>
- <td class="td">No</td>
- <td class="td">Returns FALSE if any value provided in a comma separated list is not a valid email.</td>
- <td class="td">&nbsp;</td>
-</tr>
-<tr>
-<td class="td"><strong>valid_ip</strong></td>
-<td class="td">No</td>
-<td class="td">Returns FALSE if the supplied IP is not valid.</td>
-<td class="td">&nbsp;</td>
-</tr>
-<tr>
- <td class="td"><strong>valid_base64</strong></td>
- <td class="td">No</td>
- <td class="td">Returns FALSE if the supplied string contains anything other than valid Base64 characters.</td>
- <td class="td">&nbsp;</td>
-</tr>
-</table>
-
-<p><strong>Note:</strong> These rules can also be called as discrete functions. For example:</p>
-
-<code>$this->validation->required($string);</code>
-
-<p class="important"><strong>Note:</strong> You can also use any native PHP functions that permit one parameter.</p>
-
-
-
-<h2>Prepping Reference</h2>
-
-<p>The following is a list of all the prepping functions that are available to use:</p>
-
-
-
-<table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder">
-<tr>
-<th>Name</th>
-<th>Parameter</th>
-<th>Description</th>
-</tr><tr>
-
-<td class="td"><strong>xss_clean</strong></td>
-<td class="td">No</td>
-<td class="td">Runs the data through the XSS filtering function, described in the <a href="input.html">Input Class</a> page.</td>
-</tr><tr>
-
-<td class="td"><strong>prep_for_form</strong></td>
-<td class="td">No</td>
-<td class="td">Converts special characters so that HTML data can be shown in a form field without breaking it.</td>
-</tr><tr>
-
-<td class="td"><strong>prep_url</strong></td>
-<td class="td">No</td>
-<td class="td">Adds "http://" to URLs if missing.</td>
-</tr><tr>
-
-<td class="td"><strong>strip_image_tags</strong></td>
-<td class="td">No</td>
-<td class="td">Strips the HTML from image tags leaving the raw URL.</td>
-</tr><tr>
-
-<td class="td"><strong>encode_php_tags</strong></td>
-<td class="td">No</td>
-<td class="td">Converts PHP tags to entities.</td>
-</tr>
-
-</table>
-
-<p class="important"><strong>Note:</strong> You can also use any native PHP functions that permit one parameter,
-like <kbd>trim</kbd>, <kbd>htmlspecialchars</kbd>, <kbd>urldecode</kbd>, etc.</p>
-
-
-<h2>Setting Custom Error Messages</h2>
-
-<p>All of the native error messages are located in the following language file: <dfn>language/english/validation_lang.php</dfn></p>
-
-<p>To set your own custom message you can either edit that file, or use the following function:</p>
-
-<code>$this->validation->set_message('<var>rule</var>', '<var>Error Message</var>');</code>
-
-<p>Where <var>rule</var> corresponds to the name of a particular rule, and <var>Error Message</var> is the text you would like displayed.</p>
-
-
-<h2>Dealing with Select Menus, Radio Buttons, and Checkboxes</h2>
-
-<p>If you use select menus, radio buttons or checkboxes, you will want the state of
-these items to be retained in the event of an error. The Validation class has three functions that help you do this:</p>
-
-<h2>set_select()</h2>
-
-<p>Permits you to display the menu item that was selected. The first parameter
-must contain the name of the select menu, the second parameter must contain the value of
-each item. Example:</p>
-
-<code>
-&lt;select name="myselect"><br />
-&lt;option value="one" <dfn>&lt;?php echo $this->validation->set_select('myselect', 'one'); ?></dfn> >One&lt;/option><br />
-&lt;option value="two" <dfn>&lt;?php echo $this->validation->set_select('myselect', 'two'); ?></dfn> >Two&lt;/option><br />
-&lt;option value="three" <dfn>&lt;?php echo $this->validation->set_select('myselect', 'three'); ?></dfn> >Three&lt;/option><br />
-&lt;/select>
-</code>
-
-
-<h2>set_checkbox()</h2>
-
-<p>Permits you to display a checkbox in the state it was submitted. The first parameter
-must contain the name of the checkbox, the second parameter must contain its value. Example:</p>
-
-<code>&lt;input type="checkbox" name="mycheck" value="1" <dfn>&lt;?php echo $this->validation->set_checkbox('mycheck', '1'); ?></dfn> /></code>
-
-
-<h2>set_radio()</h2>
-
-<p>Permits you to display radio buttons in the state they were submitted. The first parameter
-must contain the name of the radio button, the second parameter must contain its value. Example:</p>
-
-<code>&lt;input type="radio" name="myradio" value="1" <dfn>&lt;?php echo $this->validation->set_radio('myradio', '1'); ?></dfn> /></code>
-
-
-
-
-
-</div>
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