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File: system/helpers/form_helper.php

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File: system/helpers/form_helper.php
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Description: Example script
Class: PHP Attendance Management System using Fingerprint
Keep track of employee attendance with fingerprint
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Last change: improve feature, now with datables, fix some bugs

improve feature, now with datables, fix some bugs
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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Form Helpers * * @package CodeIgniter * @subpackage Helpers * @category Helpers * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/helpers/form_helper.html */ // ------------------------------------------------------------------------ if (!function_exists('form_open')) { /** * Form Declaration * * Creates the opening portion of the form. * * @param string the URI segments of the form destination * @param array a key/value pair of attributes * @param array a key/value pair hidden data * @return string */ function form_open($action = '', $attributes = array(), $hidden = array()) { $CI =& get_instance(); // If no action is provided then set to the current url if (!$action) { $action = $CI->config->site_url($CI->uri->uri_string()); } // If an action is not a full URL then turn it into one elseif (strpos($action, '://') === FALSE) { $action = $CI->config->site_url($action); } $attributes = _attributes_to_string($attributes); if (stripos($attributes, 'method=') === FALSE) { $attributes .= ' method="post"'; } if (stripos($attributes, 'accept-charset=') === FALSE) { $attributes .= ' accept-charset="' . strtolower(config_item('charset')) . '"'; } $form = '<form action="' . $action . '"' . $attributes . ">\n"; if (is_array($hidden)) { foreach ($hidden as $name => $value) { $form .= '<input type="hidden" name="' . $name . '" value="' . html_escape($value) . '" />' . "\n"; } } // Add CSRF field if enabled, but leave it out for GET requests and requests to external websites if ($CI->config->item('csrf_protection') === TRUE && strpos($action, $CI->config->base_url()) !== FALSE && !stripos($form, 'method="get"')) { // Prepend/append random-length "white noise" around the CSRF // token input, as a form of protection against BREACH attacks if (FALSE !== ($noise = $CI->security->get_random_bytes(1))) { list(, $noise) = unpack('c', $noise); } else { $noise = mt_rand(-128, 127); } // Prepend if $noise has a negative value, append if positive, do nothing for zero $prepend = $append = ''; if ($noise < 0) { $prepend = str_repeat(" ", abs($noise)); } elseif ($noise > 0) { $append = str_repeat(" ", $noise); } $form .= sprintf( '%s<input type="hidden" name="%s" value="%s" />%s%s', $prepend, $CI->security->get_csrf_token_name(), $CI->security->get_csrf_hash(), $append, "\n" ); } return $form; } } // ------------------------------------------------------------------------ if (!function_exists('form_open_multipart')) { /** * Form Declaration - Multipart type * * Creates the opening portion of the form, but with "multipart/form-data". * * @param string the URI segments of the form destination * @param array a key/value pair of attributes * @param array a key/value pair hidden data * @return string */ function form_open_multipart($action = '', $attributes = array(), $hidden = array()) { if (is_string($attributes)) { $attributes .= ' enctype="multipart/form-data"'; } else { $attributes['enctype'] = 'multipart/form-data'; } return form_open($action, $attributes, $hidden); } } // ------------------------------------------------------------------------ if (!function_exists('form_hidden')) { /** * Hidden Input Field * * Generates hidden fields. You can pass a simple key/value string or * an associative array with multiple values. * * @param mixed $name Field name * @param string $value Field value * @param bool $recursing * @return string */ function form_hidden($name, $value = '', $recursing = FALSE) { static $form; if ($recursing === FALSE) { $form = "\n"; } if (is_array($name)) { foreach ($name as $key => $val) { form_hidden($key, $val, TRUE); } return $form; } if (!is_array($value)) { $form .= '<input type="hidden" name="' . $name . '" value="' . html_escape($value) . "\" />\n"; } else { foreach ($value as $k => $v) { $k = is_int($k) ? '' : $k; form_hidden($name . '[' . $k . ']', $v, TRUE); } } return $form; } } // ------------------------------------------------------------------------ if (!function_exists('form_input')) { /** * Text Input Field * * @param mixed * @param string * @param mixed * @return string */ function form_input($data = '', $value = '', $extra = '') { $defaults = array( 'type' => 'text', 'name' => is_array($data) ? '' : $data, 'value' => $value ); return '<input ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . " />\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_password')) { /** * Password Field * * Identical to the input function but adds the "password" type * * @param mixed * @param string * @param mixed * @return string */ function form_password($data = '', $value = '', $extra = '') { is_array($data) OR $data = array('name' => $data); $data['type'] = 'password'; return form_input($data, $value, $extra); } } // ------------------------------------------------------------------------ if (!function_exists('form_upload')) { /** * Upload Field * * Identical to the input function but adds the "file" type * * @param mixed * @param string * @param mixed * @return string */ function form_upload($data = '', $value = '', $extra = '') { $defaults = array('type' => 'file', 'name' => ''); is_array($data) OR $data = array('name' => $data); $data['type'] = 'file'; return '<input ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . " />\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_textarea')) { /** * Textarea field * * @param mixed $data * @param string $value * @param mixed $extra * @return string */ function form_textarea($data = '', $value = '', $extra = '') { $defaults = array( 'name' => is_array($data) ? '' : $data, 'cols' => '40', 'rows' => '10' ); if (!is_array($data) OR !isset($data['value'])) { $val = $value; } else { $val = $data['value']; unset($data['value']); // textareas don't use the value attribute } return '<textarea ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . '>' . html_escape($val) . "</textarea>\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_multiselect')) { /** * Multi-select menu * * @param string * @param array * @param mixed * @param mixed * @return string */ function form_multiselect($name = '', $options = array(), $selected = array(), $extra = '') { $extra = _attributes_to_string($extra); if (stripos($extra, 'multiple') === FALSE) { $extra .= ' multiple="multiple"'; } return form_dropdown($name, $options, $selected, $extra); } } // -------------------------------------------------------------------- if (!function_exists('form_dropdown')) { /** * Drop-down Menu * * @param mixed $data * @param mixed $options * @param mixed $selected * @param mixed $extra * @return string */ function form_dropdown($data = '', $options = array(), $selected = array(), $extra = '') { $defaults = array(); if (is_array($data)) { if (isset($data['selected'])) { $selected = $data['selected']; unset($data['selected']); // select tags don't have a selected attribute } if (isset($data['options'])) { $options = $data['options']; unset($data['options']); // select tags don't use an options attribute } } else { $defaults = array('name' => $data); } is_array($selected) OR $selected = array($selected); is_array($options) OR $options = array($options); // If no selected state was submitted we will attempt to set it automatically if (empty($selected)) { if (is_array($data)) { if (isset($data['name'], $_POST[$data['name']])) { $selected = array($_POST[$data['name']]); } } elseif (isset($_POST[$data])) { $selected = array($_POST[$data]); } } $extra = _attributes_to_string($extra); $multiple = (count($selected) > 1 && stripos($extra, 'multiple') === FALSE) ? ' multiple="multiple"' : ''; $form = '<select ' . rtrim(_parse_form_attributes($data, $defaults)) . $extra . $multiple . ">\n"; foreach ($options as $key => $val) { $key = (string)$key; if (is_array($val)) { if (empty($val)) { continue; } $form .= '<optgroup label="' . $key . "\">\n"; foreach ($val as $optgroup_key => $optgroup_val) { $sel = in_array($optgroup_key, $selected) ? ' selected="selected"' : ''; $form .= '<option value="' . html_escape($optgroup_key) . '"' . $sel . '>' . (string)$optgroup_val . "</option>\n"; } $form .= "</optgroup>\n"; } else { $form .= '<option value="' . html_escape($key) . '"' . (in_array($key, $selected) ? ' selected="selected"' : '') . '>' . (string)$val . "</option>\n"; } } return $form . "</select>\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_checkbox')) { /** * Checkbox Field * * @param mixed * @param string * @param bool * @param mixed * @return string */ function form_checkbox($data = '', $value = '', $checked = FALSE, $extra = '') { $defaults = array('type' => 'checkbox', 'name' => (!is_array($data) ? $data : ''), 'value' => $value); if (is_array($data) && array_key_exists('checked', $data)) { $checked = $data['checked']; if ($checked == FALSE) { unset($data['checked']); } else { $data['checked'] = 'checked'; } } if ($checked == TRUE) { $defaults['checked'] = 'checked'; } else { unset($defaults['checked']); } return '<input ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . " />\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_radio')) { /** * Radio Button * * @param mixed * @param string * @param bool * @param mixed * @return string */ function form_radio($data = '', $value = '', $checked = FALSE, $extra = '') { is_array($data) OR $data = array('name' => $data); $data['type'] = 'radio'; return form_checkbox($data, $value, $checked, $extra); } } // ------------------------------------------------------------------------ if (!function_exists('form_submit')) { /** * Submit Button * * @param mixed * @param string * @param mixed * @return string */ function form_submit($data = '', $value = '', $extra = '') { $defaults = array( 'type' => 'submit', 'name' => is_array($data) ? '' : $data, 'value' => $value ); return '<input ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . " />\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_reset')) { /** * Reset Button * * @param mixed * @param string * @param mixed * @return string */ function form_reset($data = '', $value = '', $extra = '') { $defaults = array( 'type' => 'reset', 'name' => is_array($data) ? '' : $data, 'value' => $value ); return '<input ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . " />\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_button')) { /** * Form Button * * @param mixed * @param string * @param mixed * @return string */ function form_button($data = '', $content = '', $extra = '') { $defaults = array( 'name' => is_array($data) ? '' : $data, 'type' => 'button' ); if (is_array($data) && isset($data['content'])) { $content = $data['content']; unset($data['content']); // content is not an attribute } return '<button ' . _parse_form_attributes($data, $defaults) . _attributes_to_string($extra) . '>' . $content . "</button>\n"; } } // ------------------------------------------------------------------------ if (!function_exists('form_label')) { /** * Form Label Tag * * @param string The text to appear onscreen * @param string The id the label applies to * @param mixed Additional attributes * @return string */ function form_label($label_text = '', $id = '', $attributes = array()) { $label = '<label'; if ($id !== '') { $label .= ' for="' . $id . '"'; } $label .= _attributes_to_string($attributes); return $label . '>' . $label_text . '</label>'; } } // ------------------------------------------------------------------------ if (!function_exists('form_fieldset')) { /** * Fieldset Tag * * Used to produce <fieldset><legend>text</legend>. To close fieldset * use form_fieldset_close() * * @param string The legend text * @param array Additional attributes * @return string */ function form_fieldset($legend_text = '', $attributes = array()) { $fieldset = '<fieldset' . _attributes_to_string($attributes) . ">\n"; if ($legend_text !== '') { return $fieldset . '<legend>' . $legend_text . "</legend>\n"; } return $fieldset; } } // ------------------------------------------------------------------------ if (!function_exists('form_fieldset_close')) { /** * Fieldset Close Tag * * @param string * @return string */ function form_fieldset_close($extra = '') { return '</fieldset>' . $extra; } } // ------------------------------------------------------------------------ if (!function_exists('form_close')) { /** * Form Close Tag * * @param string * @return string */ function form_close($extra = '') { return '</form>' . $extra; } } // ------------------------------------------------------------------------ if (!function_exists('form_prep')) { /** * Form Prep * * Formats text so that it can be safely placed in a form field in the event it has HTML tags. * * @deprecated 3.0.0 An alias for html_escape() * @param string|string[] $str Value to escape * @return string|string[] Escaped values */ function form_prep($str) { return html_escape($str, TRUE); } } // ------------------------------------------------------------------------ if (!function_exists('set_value')) { /** * Form Value * * Grabs a value from the POST array for the specified field so you can * re-populate an input field or textarea. If Form Validation * is active it retrieves the info from the validation class * * @param string $field Field name * @param string $default Default value * @param bool $html_escape Whether to escape HTML special characters or not * @return string */ function set_value($field, $default = '', $html_escape = TRUE) { $CI =& get_instance(); $value = (isset($CI->form_validation) && is_object($CI->form_validation) && $CI->form_validation->has_rule($field)) ? $CI->form_validation->set_value($field, $default) : $CI->input->post($field, FALSE); isset($value) OR $value = $default; return ($html_escape) ? html_escape($value) : $value; } } // ------------------------------------------------------------------------ if (!function_exists('set_select')) { /** * Set Select * * Let's you set the selected value of a <select> menu via data in the POST array. * If Form Validation is active it retrieves the info from the validation class * * @param string * @param string * @param bool * @return string */ function set_select($field, $value = '', $default = FALSE) { $CI =& get_instance(); if (isset($CI->form_validation) && is_object($CI->form_validation) && $CI->form_validation->has_rule($field)) { return $CI->form_validation->set_select($field, $value, $default); } elseif (($input = $CI->input->post($field, FALSE)) === NULL) { return ($default === TRUE) ? ' selected="selected"' : ''; } $value = (string)$value; if (is_array($input)) { // Note: in_array('', array(0)) returns TRUE, do not use it foreach ($input as &$v) { if ($value === $v) { return ' selected="selected"'; } } return ''; } return ($input === $value) ? ' selected="selected"' : ''; } } // ------------------------------------------------------------------------ if (!function_exists('set_checkbox')) { /** * Set Checkbox * * Let's you set the selected value of a checkbox via the value in the POST array. * If Form Validation is active it retrieves the info from the validation class * * @param string * @param string * @param bool * @return string */ function set_checkbox($field, $value = '', $default = FALSE) { $CI =& get_instance(); if (isset($CI->form_validation) && is_object($CI->form_validation) && $CI->form_validation->has_rule($field)) { return $CI->form_validation->set_checkbox($field, $value, $default); } // Form inputs are always strings ... $value = (string)$value; $input = $CI->input->post($field, FALSE); if (is_array($input)) { // Note: in_array('', array(0)) returns TRUE, do not use it foreach ($input as &$v) { if ($value === $v) { return ' checked="checked"'; } } return ''; } // Unchecked checkbox and radio inputs are not even submitted by browsers ... if ($CI->input->method() === 'post') { return ($input === $value) ? ' checked="checked"' : ''; } return ($default === TRUE) ? ' checked="checked"' : ''; } } // ------------------------------------------------------------------------ if (!function_exists('set_radio')) { /** * Set Radio * * Let's you set the selected value of a radio field via info in the POST array. * If Form Validation is active it retrieves the info from the validation class * * @param string $field * @param string $value * @param bool $default * @return string */ function set_radio($field, $value = '', $default = FALSE) { $CI =& get_instance(); if (isset($CI->form_validation) && is_object($CI->form_validation) && $CI->form_validation->has_rule($field)) { return $CI->form_validation->set_radio($field, $value, $default); } // Form inputs are always strings ... $value = (string)$value; $input = $CI->input->post($field, FALSE); if (is_array($input)) { // Note: in_array('', array(0)) returns TRUE, do not use it foreach ($input as &$v) { if ($value === $v) { return ' checked="checked"'; } } return ''; } // Unchecked checkbox and radio inputs are not even submitted by browsers ... if ($CI->input->method() === 'post') { return ($input === $value) ? ' checked="checked"' : ''; } return ($default === TRUE) ? ' checked="checked"' : ''; } } // ------------------------------------------------------------------------ if (!function_exists('form_error')) { /** * Form Error * * Returns the error for a specific form field. This is a helper for the * form validation class. * * @param string * @param string * @param string * @return string */ function form_error($field = '', $prefix = '', $suffix = '') { if (FALSE === ($OBJ =& _get_validation_object())) { return ''; } return $OBJ->error($field, $prefix, $suffix); } } // ------------------------------------------------------------------------ if (!function_exists('validation_errors')) { /** * Validation Error String * * Returns all the errors associated with a form submission. This is a helper * function for the form validation class. * * @param string * @param string * @return string */ function validation_errors($prefix = '', $suffix = '') { if (FALSE === ($OBJ =& _get_validation_object())) { return ''; } return $OBJ->error_string($prefix, $suffix); } } // ------------------------------------------------------------------------ if (!function_exists('_parse_form_attributes')) { /** * Parse the form attributes * * Helper function used by some of the form helpers * * @param array $attributes List of attributes * @param array $default Default values * @return string */ function _parse_form_attributes($attributes, $default) { if (is_array($attributes)) { foreach ($default as $key => $val) { if (isset($attributes[$key])) { $default[$key] = $attributes[$key]; unset($attributes[$key]); } } if (count($attributes) > 0) { $default = array_merge($default, $attributes); } } $att = ''; foreach ($default as $key => $val) { if ($key === 'value') { $val = html_escape($val); } elseif ($key === 'name' && !strlen($default['name'])) { continue; } $att .= $key . '="' . $val . '" '; } return $att; } } // ------------------------------------------------------------------------ if (!function_exists('_attributes_to_string')) { /** * Attributes To String * * Helper function used by some of the form helpers * * @param mixed * @return string */ function _attributes_to_string($attributes) { if (empty($attributes)) { return ''; } if (is_object($attributes)) { $attributes = (array)$attributes; } if (is_array($attributes)) { $atts = ''; foreach ($attributes as $key => $val) { $atts .= ' ' . $key . '="' . $val . '"'; } return $atts; } if (is_string($attributes)) { return ' ' . $attributes; } return FALSE; } } // ------------------------------------------------------------------------ if (!function_exists('_get_validation_object')) { /** * Validation Object * * Determines what the form validation class was instantiated as, fetches * the object and returns it. * * @return mixed */ function &_get_validation_object() { $CI =& get_instance(); // We set this as a variable since we're returning by reference. $return = FALSE; if (FALSE !== ($object = $CI->load->is_loaded('Form_validation'))) { if (!isset($CI->$object) OR !is_object($CI->$object)) { return $return; } return $CI->$object; } return $return; } }