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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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @license https://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 URL Helpers
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/helpers/url_helper.html
*/
// ------------------------------------------------------------------------
if ( ! function_exists('site_url'))
{
/**
* Site URL
*
* Create a local URL based on your basepath. Segments can be passed via the
* first parameter either as a string or an array.
*
* @param string $uri
* @param string $protocol
* @return string
*/
function site_url($uri = '', $protocol = NULL)
{
return get_instance()->config->site_url($uri, $protocol);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('base_url'))
{
/**
* Base URL
*
* Create a local URL based on your basepath.
* Segments can be passed in as a string or an array, same as site_url
* or a URL to a file can be passed in, e.g. to an image file.
*
* @param string $uri
* @param string $protocol
* @return string
*/
function base_url($uri = '', $protocol = NULL)
{
return get_instance()->config->base_url($uri, $protocol);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('current_url'))
{
/**
* Current URL
*
* Returns the full URL (including segments) of the page where this
* function is placed
*
* @return string
*/
function current_url()
{
$CI =& get_instance();
return $CI->config->site_url($CI->uri->uri_string());
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('uri_string'))
{
/**
* URL String
*
* Returns the URI segments.
*
* @return string
*/
function uri_string()
{
return get_instance()->uri->uri_string();
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('index_page'))
{
/**
* Index page
*
* Returns the "index_page" from your config file
*
* @return string
*/
function index_page()
{
return get_instance()->config->item('index_page');
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('anchor'))
{
/**
* Anchor Link
*
* Creates an anchor based on the local URL.
*
* @param string the URL
* @param string the link title
* @param mixed any attributes
* @return string
*/
function anchor($uri = '', $title = '', $attributes = '')
{
$title = (string) $title;
$site_url = is_array($uri)
? site_url($uri)
: (preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri));
if ($title === '')
{
$title = $site_url;
}
if ($attributes !== '')
{
$attributes = _stringify_attributes($attributes);
}
return '<a href="'.$site_url.'"'.$attributes.'>'.$title.'</a>';
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('anchor_popup'))
{
/**
* Anchor Link - Pop-up version
*
* Creates an anchor based on the local URL. The link
* opens a new window based on the attributes specified.
*
* @param string the URL
* @param string the link title
* @param mixed any attributes
* @return string
*/
function anchor_popup($uri = '', $title = '', $attributes = FALSE)
{
$title = (string) $title;
$site_url = preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri);
if ($title === '')
{
$title = $site_url;
}
if ($attributes === FALSE)
{
return '<a href="'.$site_url.'" onclick="window.open(\''.$site_url."', '_blank'); return false;\">".$title.'</a>';
}
if ( ! is_array($attributes))
{
$attributes = array($attributes);
// Ref: http://www.w3schools.com/jsref/met_win_open.asp
$window_name = '_blank';
}
elseif ( ! empty($attributes['window_name']))
{
$window_name = $attributes['window_name'];
unset($attributes['window_name']);
}
else
{
$window_name = '_blank';
}
foreach (array('width' => '800', 'height' => '600', 'scrollbars' => 'yes', 'menubar' => 'no', 'status' => 'yes', 'resizable' => 'yes', 'screenx' => '0', 'screeny' => '0') as $key => $val)
{
$atts[$key] = isset($attributes[$key]) ? $attributes[$key] : $val;
unset($attributes[$key]);
}
$attributes = _stringify_attributes($attributes);
return '<a href="'.$site_url
.'" onclick="window.open(\''.$site_url."', '".$window_name."', '"._stringify_attributes($atts, TRUE)."'); return false;\""
.$attributes.'>'.$title.'</a>';
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('mailto'))
{
/**
* Mailto Link
*
* @param string the email address
* @param string the link title
* @param mixed any attributes
* @return string
*/
function mailto($email, $title = '', $attributes = '')
{
$title = (string) $title;
if ($title === '')
{
$title = $email;
}
return '<a href="mailto:'.$email.'"'._stringify_attributes($attributes).'>'.$title.'</a>';
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('safe_mailto'))
{
/**
* Encoded Mailto Link
*
* Create a spam-protected mailto link written in Javascript
*
* @param string the email address
* @param string the link title
* @param mixed any attributes
* @return string
*/
function safe_mailto($email, $title = '', $attributes = '')
{
$title = (string) $title;
if ($title === '')
{
$title = $email;
}
$x = str_split('<a href="mailto:', 1);
for ($i = 0, $l = strlen($email); $i < $l; $i++)
{
$x[] = '|'.ord($email[$i]);
}
$x[] = '"';
if ($attributes !== '')
{
if (is_array($attributes))
{
foreach ($attributes as $key => $val)
{
$x[] = ' '.$key.'="';
for ($i = 0, $l = strlen($val); $i < $l; $i++)
{
$x[] = '|'.ord($val[$i]);
}
$x[] = '"';
}
}
else
{
for ($i = 0, $l = strlen($attributes); $i < $l; $i++)
{
$x[] = $attributes[$i];
}
}
}
$x[] = '>';
$temp = array();
for ($i = 0, $l = strlen($title); $i < $l; $i++)
{
$ordinal = ord($title[$i]);
if ($ordinal < 128)
{
$x[] = '|'.$ordinal;
}
else
{
if (count($temp) === 0)
{
$count = ($ordinal < 224) ? 2 : 3;
}
$temp[] = $ordinal;
if (count($temp) === $count)
{
$number = ($count === 3)
? (($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64)
: (($temp[0] % 32) * 64) + ($temp[1] % 64);
$x[] = '|'.$number;
$count = 1;
$temp = array();
}
}
}
$x[] = '<'; $x[] = '/'; $x[] = 'a'; $x[] = '>';
$x = array_reverse($x);
$output = "<script type=\"text/javascript\">\n"
."\t//<![CDATA[\n"
."\tvar l=new Array();\n";
for ($i = 0, $c = count($x); $i < $c; $i++)
{
$output .= "\tl[".$i."] = '".$x[$i]."';\n";
}
$output .= "\n\tfor (var i = l.length-1; i >= 0; i=i-1) {\n"
."\t\tif (l[i].substring(0, 1) === '|') document.write(\"&#\"+unescape(l[i].substring(1))+\";\");\n"
."\t\telse document.write(unescape(l[i]));\n"
."\t}\n"
."\t//]]>\n"
.'</script>';
return $output;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('auto_link'))
{
/**
* Auto-linker
*
* Automatically links URL and Email addresses.
* Note: There's a bit of extra code here to deal with
* URLs or emails that end in a period. We'll strip these
* off and add them after the link.
*
* @param string the string
* @param string the type: email, url, or both
* @param bool whether to create pop-up links
* @return string
*/
function auto_link($str, $type = 'both', $popup = FALSE)
{
// Find and replace any URLs.
if ($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))
{
// Set our target HTML if using popup links.
$target = ($popup) ? ' target="_blank" rel="noopener"' : '';
// We process the links in reverse order (last -> first) so that
// the returned string offsets from preg_match_all() are not
// moved as we add more HTML.
foreach (array_reverse($matches) as $match)
{
// $match[0] is the matched string/link
// $match[1] is either a protocol prefix or 'www.'
//
// With PREG_OFFSET_CAPTURE, both of the above is an array,
// where the actual value is held in [0] and its offset at the [1] index.
$a = '<a href="'.(strpos($match[1][0], '/') ? '' : 'http://').$match[0][0].'"'.$target.'>'.$match[0][0].'</a>';
$str = substr_replace($str, $a, $match[0][1], strlen($match[0][0]));
}
}
// Find and replace any emails.
if ($type !== 'url' && preg_match_all('#([\w\.\-\+]+@[a-z0-9\-]+\.[a-z0-9\-\.]+[^[:punct:]\s])#i', $str, $matches, PREG_OFFSET_CAPTURE))
{
foreach (array_reverse($matches[0]) as $match)
{
if (filter_var($match[0], FILTER_VALIDATE_EMAIL) !== FALSE)
{
$str = substr_replace($str, safe_mailto($match[0]), $match[1], strlen($match[0]));
}
}
}
return $str;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('prep_url'))
{
/**
* Prep URL
*
* Simply adds the http:// part if no scheme is included
*
* @param string the URL
* @return string
*/
function prep_url($str = '')
{
if ($str === 'http://' OR $str === '')
{
return '';
}
$url = parse_url($str);
if ( ! $url OR ! isset($url['scheme']))
{
return 'http://'.$str;
}
return $str;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('url_title'))
{
/**
* Create URL Title
*
* Takes a "title" string as input and creates a
* human-friendly URL string with a "separator" string
* as the word separator.
*
* @todo Remove old 'dash' and 'underscore' usage in 3.1+.
* @param string $str Input string
* @param string $separator Word separator
* (usually '-' or '_')
* @param bool $lowercase Whether to transform the output string to lowercase
* @return string
*/
function url_title($str, $separator = '-', $lowercase = FALSE)
{
if ($separator === 'dash')
{
$separator = '-';
}
elseif ($separator === 'underscore')
{
$separator = '_';
}
$q_separator = preg_quote($separator, '#');
$trans = array(
'&.+?;' => '',
'[^\w\d _-]' => '',
'\s+' => $separator,
'('.$q_separator.')+' => $separator
);
$str = strip_tags($str);
foreach ($trans as $key => $val)
{
$str = preg_replace('#'.$key.'#i'.(UTF8_ENABLED ? 'u' : ''), $val, $str);
}
if ($lowercase === TRUE)
{
$str = strtolower($str);
}
return trim(trim($str, $separator));
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('redirect'))
{
/**
* Header Redirect
*
* Header redirect in two flavors
* For very fine grained control over headers, you could use the Output
* Library's set_header() function.
*
* @param string $uri URL
* @param string $method Redirect method
* 'auto', 'location' or 'refresh'
* @param int $code HTTP Response status code
* @return void
*/
function redirect($uri = '', $method = 'auto', $code = NULL)
{
if ( ! preg_match('#^(\w+:)?//#i', $uri))
{
$uri = site_url($uri);
}
// IIS environment likely? Use 'refresh' for better compatibility
if ($method === 'auto' && isset($_SERVER['SERVER_SOFTWARE']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== FALSE)
{
$method = 'refresh';
}
elseif ($method !== 'refresh' && (empty($code) OR ! is_numeric($code)))
{
if (isset($_SERVER['SERVER_PROTOCOL'], $_SERVER['REQUEST_METHOD']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.1')
{
$code = ($_SERVER['REQUEST_METHOD'] !== 'GET')
? 303 // reference: http://en.wikipedia.org/wiki/Post/Redirect/Get
: 307;
}
else
{
$code = 302;
}
}
switch ($method)
{
case 'refresh':
header('Refresh:0;url='.$uri);
break;
default:
header('Location: '.$uri, TRUE, $code);
break;
}
exit;
}
}