570 lines
14 KiB
PHP
570 lines
14 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* CodeIgniter URL Helpers
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*
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* @package CodeIgniter
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* @subpackage Helpers
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* @category Helpers
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/helpers/url_helper.html
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*/
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// ------------------------------------------------------------------------
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if ( ! function_exists('site_url'))
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{
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/**
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* Site URL
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*
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* Create a local URL based on your basepath. Segments can be passed via the
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* first parameter either as a string or an array.
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*
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* @param string $uri
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* @param string $protocol
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* @return string
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*/
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function site_url($uri = '', $protocol = NULL)
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{
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return get_instance()->config->site_url($uri, $protocol);
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('base_url'))
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{
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/**
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* Base URL
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*
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* Create a local URL based on your basepath.
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* Segments can be passed in as a string or an array, same as site_url
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* or a URL to a file can be passed in, e.g. to an image file.
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*
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* @param string $uri
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* @param string $protocol
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* @return string
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*/
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function base_url($uri = '', $protocol = NULL)
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{
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return get_instance()->config->base_url($uri, $protocol);
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('current_url'))
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{
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/**
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* Current URL
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*
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* Returns the full URL (including segments) of the page where this
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* function is placed
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*
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* @return string
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*/
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function current_url()
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{
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$CI =& get_instance();
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return $CI->config->site_url($CI->uri->uri_string());
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('uri_string'))
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{
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/**
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* URL String
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*
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* Returns the URI segments.
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*
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* @return string
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*/
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function uri_string()
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{
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return get_instance()->uri->uri_string();
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('index_page'))
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{
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/**
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* Index page
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*
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* Returns the "index_page" from your config file
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*
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* @return string
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*/
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function index_page()
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{
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return get_instance()->config->item('index_page');
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('anchor'))
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{
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/**
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* Anchor Link
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*
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* Creates an anchor based on the local URL.
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*
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* @param string the URL
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* @param string the link title
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* @param mixed any attributes
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* @return string
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*/
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function anchor($uri = '', $title = '', $attributes = '')
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{
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$title = (string) $title;
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$site_url = is_array($uri)
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? site_url($uri)
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: (preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri));
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if ($title === '')
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{
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$title = $site_url;
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}
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if ($attributes !== '')
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{
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$attributes = _stringify_attributes($attributes);
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}
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return '<a href="'.$site_url.'"'.$attributes.'>'.$title.'</a>';
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('anchor_popup'))
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{
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/**
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* Anchor Link - Pop-up version
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*
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* Creates an anchor based on the local URL. The link
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* opens a new window based on the attributes specified.
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*
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* @param string the URL
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* @param string the link title
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* @param mixed any attributes
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* @return string
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*/
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function anchor_popup($uri = '', $title = '', $attributes = FALSE)
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{
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$title = (string) $title;
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$site_url = preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri);
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if ($title === '')
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{
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$title = $site_url;
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}
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if ($attributes === FALSE)
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{
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return '<a href="'.$site_url.'" onclick="window.open(\''.$site_url."', '_blank'); return false;\">".$title.'</a>';
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}
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if ( ! is_array($attributes))
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{
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$attributes = array($attributes);
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// Ref: http://www.w3schools.com/jsref/met_win_open.asp
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$window_name = '_blank';
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}
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elseif ( ! empty($attributes['window_name']))
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{
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$window_name = $attributes['window_name'];
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unset($attributes['window_name']);
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}
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else
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{
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$window_name = '_blank';
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}
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foreach (array('width' => '800', 'height' => '600', 'scrollbars' => 'yes', 'menubar' => 'no', 'status' => 'yes', 'resizable' => 'yes', 'screenx' => '0', 'screeny' => '0') as $key => $val)
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{
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$atts[$key] = isset($attributes[$key]) ? $attributes[$key] : $val;
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unset($attributes[$key]);
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}
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$attributes = _stringify_attributes($attributes);
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return '<a href="'.$site_url
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.'" onclick="window.open(\''.$site_url."', '".$window_name."', '"._stringify_attributes($atts, TRUE)."'); return false;\""
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.$attributes.'>'.$title.'</a>';
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('mailto'))
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{
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/**
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* Mailto Link
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*
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* @param string the email address
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* @param string the link title
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* @param mixed any attributes
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* @return string
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*/
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function mailto($email, $title = '', $attributes = '')
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{
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$title = (string) $title;
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if ($title === '')
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{
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$title = $email;
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}
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return '<a href="mailto:'.$email.'"'._stringify_attributes($attributes).'>'.$title.'</a>';
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('safe_mailto'))
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{
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/**
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* Encoded Mailto Link
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*
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* Create a spam-protected mailto link written in Javascript
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*
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* @param string the email address
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* @param string the link title
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* @param mixed any attributes
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* @return string
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*/
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function safe_mailto($email, $title = '', $attributes = '')
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{
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$title = (string) $title;
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if ($title === '')
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{
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$title = $email;
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}
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$x = str_split('<a href="mailto:', 1);
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for ($i = 0, $l = strlen($email); $i < $l; $i++)
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{
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$x[] = '|'.ord($email[$i]);
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}
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$x[] = '"';
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if ($attributes !== '')
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{
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if (is_array($attributes))
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{
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foreach ($attributes as $key => $val)
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{
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$x[] = ' '.$key.'="';
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for ($i = 0, $l = strlen($val); $i < $l; $i++)
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{
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$x[] = '|'.ord($val[$i]);
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}
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$x[] = '"';
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}
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}
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else
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{
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for ($i = 0, $l = strlen($attributes); $i < $l; $i++)
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{
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$x[] = $attributes[$i];
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}
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}
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}
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$x[] = '>';
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$temp = array();
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for ($i = 0, $l = strlen($title); $i < $l; $i++)
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{
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$ordinal = ord($title[$i]);
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if ($ordinal < 128)
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{
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$x[] = '|'.$ordinal;
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}
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else
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{
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if (count($temp) === 0)
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{
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$count = ($ordinal < 224) ? 2 : 3;
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}
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$temp[] = $ordinal;
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if (count($temp) === $count)
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{
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$number = ($count === 3)
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? (($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64)
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: (($temp[0] % 32) * 64) + ($temp[1] % 64);
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$x[] = '|'.$number;
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$count = 1;
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$temp = array();
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}
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}
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}
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$x[] = '<'; $x[] = '/'; $x[] = 'a'; $x[] = '>';
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$x = array_reverse($x);
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$output = "<script type=\"text/javascript\">\n"
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."\t//<![CDATA[\n"
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."\tvar l=new Array();\n";
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for ($i = 0, $c = count($x); $i < $c; $i++)
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{
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$output .= "\tl[".$i."] = '".$x[$i]."';\n";
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}
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$output .= "\n\tfor (var i = l.length-1; i >= 0; i=i-1) {\n"
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."\t\tif (l[i].substring(0, 1) === '|') document.write(\"&#\"+unescape(l[i].substring(1))+\";\");\n"
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."\t\telse document.write(unescape(l[i]));\n"
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."\t}\n"
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."\t//]]>\n"
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.'</script>';
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return $output;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('auto_link'))
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{
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/**
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* Auto-linker
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*
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* Automatically links URL and Email addresses.
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* Note: There's a bit of extra code here to deal with
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* URLs or emails that end in a period. We'll strip these
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* off and add them after the link.
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*
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* @param string the string
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* @param string the type: email, url, or both
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* @param bool whether to create pop-up links
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* @return string
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*/
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function auto_link($str, $type = 'both', $popup = FALSE)
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{
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// Find and replace any URLs.
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if ($type !== 'email' && preg_match_all('#(\w*://|www\.)[a-z0-9]+(-+[a-z0-9]+)*(\.[a-z0-9]+(-+[a-z0-9]+)*)+(/([^\s()<>;]+\w)?/?)?#i', $str, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER))
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{
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// Set our target HTML if using popup links.
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$target = ($popup) ? ' target="_blank" rel="noopener"' : '';
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// We process the links in reverse order (last -> first) so that
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// the returned string offsets from preg_match_all() are not
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// moved as we add more HTML.
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foreach (array_reverse($matches) as $match)
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{
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// $match[0] is the matched string/link
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// $match[1] is either a protocol prefix or 'www.'
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//
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// With PREG_OFFSET_CAPTURE, both of the above is an array,
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// where the actual value is held in [0] and its offset at the [1] index.
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$a = '<a href="'.(strpos($match[1][0], '/') ? '' : 'http://').$match[0][0].'"'.$target.'>'.$match[0][0].'</a>';
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$str = substr_replace($str, $a, $match[0][1], strlen($match[0][0]));
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}
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}
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// Find and replace any emails.
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if ($type !== 'url' && preg_match_all('#([\w\.\-\+]+@[a-z0-9\-]+\.[a-z0-9\-\.]+[^[:punct:]\s])#i', $str, $matches, PREG_OFFSET_CAPTURE))
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{
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foreach (array_reverse($matches[0]) as $match)
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{
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if (filter_var($match[0], FILTER_VALIDATE_EMAIL) !== FALSE)
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{
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$str = substr_replace($str, safe_mailto($match[0]), $match[1], strlen($match[0]));
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}
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}
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}
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('prep_url'))
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{
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/**
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* Prep URL
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*
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* Simply adds the http:// part if no scheme is included
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*
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* @param string the URL
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* @return string
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*/
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function prep_url($str = '')
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{
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if ($str === 'http://' OR $str === '')
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{
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return '';
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}
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$url = parse_url($str);
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if ( ! $url OR ! isset($url['scheme']))
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{
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return 'http://'.$str;
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}
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('url_title'))
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{
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/**
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* Create URL Title
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*
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* Takes a "title" string as input and creates a
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* human-friendly URL string with a "separator" string
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* as the word separator.
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*
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* @todo Remove old 'dash' and 'underscore' usage in 3.1+.
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* @param string $str Input string
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* @param string $separator Word separator
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* (usually '-' or '_')
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* @param bool $lowercase Whether to transform the output string to lowercase
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* @return string
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*/
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function url_title($str, $separator = '-', $lowercase = FALSE)
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{
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if ($separator === 'dash')
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{
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$separator = '-';
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}
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elseif ($separator === 'underscore')
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{
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$separator = '_';
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}
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$q_separator = preg_quote($separator, '#');
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$trans = array(
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'&.+?;' => '',
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'[^\w\d _-]' => '',
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'\s+' => $separator,
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'('.$q_separator.')+' => $separator
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);
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$str = strip_tags($str);
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foreach ($trans as $key => $val)
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{
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$str = preg_replace('#'.$key.'#i'.(UTF8_ENABLED ? 'u' : ''), $val, $str);
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}
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if ($lowercase === TRUE)
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{
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$str = strtolower($str);
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}
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return trim(trim($str, $separator));
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('redirect'))
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{
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/**
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* Header Redirect
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*
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* Header redirect in two flavors
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* For very fine grained control over headers, you could use the Output
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* Library's set_header() function.
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*
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* @param string $uri URL
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* @param string $method Redirect method
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* 'auto', 'location' or 'refresh'
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* @param int $code HTTP Response status code
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* @return void
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*/
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function redirect($uri = '', $method = 'auto', $code = NULL)
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{
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if ( ! preg_match('#^(\w+:)?//#i', $uri))
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{
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$uri = site_url($uri);
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}
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// IIS environment likely? Use 'refresh' for better compatibility
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if ($method === 'auto' && isset($_SERVER['SERVER_SOFTWARE']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== FALSE)
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{
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$method = 'refresh';
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}
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elseif ($method !== 'refresh' && (empty($code) OR ! is_numeric($code)))
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{
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if (isset($_SERVER['SERVER_PROTOCOL'], $_SERVER['REQUEST_METHOD']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.1')
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{
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$code = ($_SERVER['REQUEST_METHOD'] !== 'GET')
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? 303 // reference: http://en.wikipedia.org/wiki/Post/Redirect/Get
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: 307;
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}
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else
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{
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$code = 302;
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}
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}
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switch ($method)
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{
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case 'refresh':
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header('Refresh:0;url='.$uri);
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break;
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default:
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header('Location: '.$uri, TRUE, $code);
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break;
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}
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exit;
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}
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}
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