/system/helpers/url_helper.php

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2008 - 2014, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter URL Helpers
 *
 * @package        CodeIgniter
 * @subpackage    Helpers
 * @category    Helpers
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/helpers/url_helper.html
 */

// ------------------------------------------------------------------------

/**
 * 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.
 *
 * @access    public
 * @param    string
 * @return    string
 */
if (!function_exists('site_url')) {
    function site_url($uri = '') {
        $CI =& get_instance();
        return $CI->config->site_url($uri);
    }
}

// ------------------------------------------------------------------------

/**
 * 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.
 *
 * @access    public
 * @param string
 * @return    string
 */
if (!function_exists('base_url')) {
    function base_url($uri = '') {
        $CI =& get_instance();
        return $CI->config->base_url($uri);
    }
}

// ------------------------------------------------------------------------

/**
 * Current URL
 *
 * Returns the full URL (including segments) of the page where this
 * function is placed
 *
 * @access    public
 * @return    string
 */
if (!function_exists('current_url')) {
    function current_url() {
        $CI =& get_instance();
        return $CI->config->site_url($CI->uri->uri_string());
    }
}

// ------------------------------------------------------------------------
/**
 * URL String
 *
 * Returns the URI segments.
 *
 * @access    public
 * @return    string
 */
if (!function_exists('uri_string')) {
    function uri_string() {
        $CI =& get_instance();
        return $CI->uri->uri_string();
    }
}

// ------------------------------------------------------------------------

/**
 * Index page
 *
 * Returns the "index_page" from your config file
 *
 * @access    public
 * @return    string
 */
if (!function_exists('index_page')) {
    function index_page() {
        $CI =& get_instance();
        return $CI->config->item('index_page');
    }
}

// ------------------------------------------------------------------------

/**
 * Anchor Link
 *
 * Creates an anchor based on the local URL.
 *
 * @access    public
 * @param    string    the URL
 * @param    string    the link title
 * @param    mixed    any attributes
 * @return    string
 */
if (!function_exists('anchor')) {
    function anchor($uri = '', $title = '', $attributes = '') {
        $title = (string)$title;

        if (!is_array($uri)) {
            $site_url = (!preg_match('!^\w+://! i', $uri)) ? site_url($uri) : $uri;
        } else {
            $site_url = site_url($uri);
        }

        if ($title == '') {
            $title = $site_url;
        }

        if ($attributes != '') {
            $attributes = _parse_attributes($attributes);
        }

        return '<a href="' . $site_url . '"' . $attributes . '>' . $title . '</a>';
    }
}

// ------------------------------------------------------------------------

/**
 * Anchor Link - Pop-up version
 *
 * Creates an anchor based on the local URL. The link
 * opens a new window based on the attributes specified.
 *
 * @access    public
 * @param    string    the URL
 * @param    string    the link title
 * @param    mixed    any attributes
 * @return    string
 */
if (!function_exists('anchor_popup')) {
    function anchor_popup($uri = '', $title = '', $attributes = FALSE) {
        $title = (string)$title;

        $site_url = (!preg_match('!^\w+://! i', $uri)) ? site_url($uri) : $uri;

        if ($title == '') {
            $title = $site_url;
        }

        if ($attributes === FALSE) {
            return "<a href='javascript:void(0);' onclick=\"window.open('" . $site_url . "', '_blank');\">" . $title . "</a>";
        }

        if (!is_array($attributes)) {
            $attributes = array();
        }

        foreach (array('width' => '800', 'height' => '600', 'scrollbars' => 'yes', 'status' => 'yes', 'resizable' => 'yes', 'screenx' => '0', 'screeny' => '0',) as $key => $val) {
            $atts[$key] = (!isset($attributes[$key])) ? $val : $attributes[$key];
            unset($attributes[$key]);
        }

        if ($attributes != '') {
            $attributes = _parse_attributes($attributes);
        }

        return "<a href='javascript:void(0);' onclick=\"window.open('" . $site_url . "', '_blank', '" . _parse_attributes($atts, TRUE) . "');\"$attributes>" . $title . "</a>";
    }
}

// ------------------------------------------------------------------------

/**
 * Mailto Link
 *
 * @access    public
 * @param    string    the email address
 * @param    string    the link title
 * @param    mixed    any attributes
 * @return    string
 */
if (!function_exists('mailto')) {
    function mailto($email, $title = '', $attributes = '') {
        $title = (string)$title;

        if ($title == "") {
            $title = $email;
        }

        $attributes = _parse_attributes($attributes);

        return '<a href="mailto:' . $email . '"' . $attributes . '>' . $title . '</a>';
    }
}

// ------------------------------------------------------------------------

/**
 * Encoded Mailto Link
 *
 * Create a spam-protected mailto link written in Javascript
 *
 * @access    public
 * @param    string    the email address
 * @param    string    the link title
 * @param    mixed    any attributes
 * @return    string
 */
if (!function_exists('safe_mailto')) {
    function safe_mailto($email, $title = '', $attributes = '') {
        $title = (string)$title;

        if ($title == "") {
            $title = $email;
        }

        for ($i = 0; $i < 16; $i++) {
            $x[] = substr('<a href="mailto:', $i, 1);
        }

        for ($i = 0; $i < strlen($email); $i++) {
            $x[] = "|" . ord(substr($email, $i, 1));
        }

        $x[] = '"';

        if ($attributes != '') {
            if (is_array($attributes)) {
                foreach ($attributes as $key => $val) {
                    $x[] = ' ' . $key . '="';
                    for ($i = 0; $i < strlen($val); $i++) {
                        $x[] = "|" . ord(substr($val, $i, 1));
                    }
                    $x[] = '"';
                }
            } else {
                for ($i = 0; $i < strlen($attributes); $i++) {
                    $x[] = substr($attributes, $i, 1);
                }
            }
        }

        $x[] = '>';

        $temp = array();
        for ($i = 0; $i < strlen($title); $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);
        ob_start();

        ?>
        <script type="text/javascript">
            //<![CDATA[
            var l = new Array();
            <?php
                $i = 0;
                foreach ($x as $val){ ?>l[<?php echo $i++; ?>] = '<?php echo $val; ?>';<?php } ?>

            for (var i = l.length - 1; i >= 0; i = i - 1) {
                if (l[i].substring(0, 1) == '|') document.write("&#" + unescape(l[i].substring(1)) + ";");
                else document.write(unescape(l[i]));
            }
            //]]>
        </script><?php

        $buffer = ob_get_contents();
        ob_end_clean();
        return $buffer;
    }
}

// ------------------------------------------------------------------------

/**
 * 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.
 *
 * @access    public
 * @param    string    the string
 * @param    string    the type: email, url, or both
 * @param    bool    whether to create pop-up links
 * @return    string
 */
if (!function_exists('auto_link')) {
    function auto_link($str, $type = 'both', $popup = FALSE) {
        if ($type != 'email') {
            if (preg_match_all("#(^|\s|\()((http(s?)://)|(www\.))(\w+[^\s\)\<]+)#i", $str, $matches)) {
                $pop = ($popup == TRUE) ? " target=\"_blank\" " : "";

                for ($i = 0; $i < count($matches['0']); $i++) {
                    $period = '';
                    if (preg_match("|\.$|", $matches['6'][$i])) {
                        $period = '.';
                        $matches['6'][$i] = substr($matches['6'][$i], 0, -1);
                    }

                    $str = str_replace($matches['0'][$i],
                        $matches['1'][$i] . '<a href="http' .
                        $matches['4'][$i] . '://' .
                        $matches['5'][$i] .
                        $matches['6'][$i] . '"' . $pop . '>http' .
                        $matches['4'][$i] . '://' .
                        $matches['5'][$i] .
                        $matches['6'][$i] . '</a>' .
                        $period, $str);
                }
            }
        }

        if ($type != 'url') {
            if (preg_match_all("/([a-zA-Z0-9_\.\-\+]+)@([a-zA-Z0-9\-]+)\.([a-zA-Z0-9\-\.]*)/i", $str, $matches)) {
                for ($i = 0; $i < count($matches['0']); $i++) {
                    $period = '';
                    if (preg_match("|\.$|", $matches['3'][$i])) {
                        $period = '.';
                        $matches['3'][$i] = substr($matches['3'][$i], 0, -1);
                    }

                    $str = str_replace($matches['0'][$i], safe_mailto($matches['1'][$i] . '@' . $matches['2'][$i] . '.' . $matches['3'][$i]) . $period, $str);
                }
            }
        }

        return $str;
    }
}

// ------------------------------------------------------------------------

/**
 * Prep URL
 *
 * Simply adds the http:// part if no scheme is included
 *
 * @access    public
 * @param    string    the URL
 * @return    string
 */
if (!function_exists('prep_url')) {
    function prep_url($str = '') {
        if ($str == 'http://' OR $str == '') {
            return '';
        }

        $url = parse_url($str);

        if (!$url OR !isset($url['scheme'])) {
            $str = 'http://' . $str;
        }

        return $str;
    }
}

// ------------------------------------------------------------------------

/**
 * Create URL Title
 *
 * Takes a "title" string as input and creates a
 * human-friendly URL string with a "separator" string
 * as the word separator.
 *
 * @access    public
 * @param    string    the string
 * @param    string    the separator
 * @return    string
 */
if (!function_exists('url_title')) {
    function url_title($str, $separator = '-', $lowercase = FALSE) {
        if ($separator == 'dash') {
            $separator = '-';
        } else if ($separator == 'underscore') {
            $separator = '_';
        }

        $q_separator = preg_quote($separator);

        $trans = array(
            '&.+?;' => '',
            '[^a-z0-9 _-]' => '',
            '\s+' => $separator,
            '(' . $q_separator . ')+' => $separator
        );

        $str = strip_tags($str);

        foreach ($trans as $key => $val) {
            $str = preg_replace("#" . $key . "#i", $val, $str);
        }

        if ($lowercase === TRUE) {
            $str = strtolower($str);
        }

        return trim($str, $separator);
    }
}

// ------------------------------------------------------------------------

/**
 * Header Redirect
 *
 * Header redirect in two flavors
 * For very fine grained control over headers, you could use the Output
 * Library's set_header() function.
 *
 * @access    public
 * @param    string    the URL
 * @param    string    the method: location or redirect
 * @return    string
 */
if (!function_exists('redirect')) {
    function redirect($uri = '', $method = 'location', $http_response_code = 302) {
        if (!preg_match('#^https?://#i', $uri)) {
            $uri = site_url($uri);
        }

        switch ($method) {
            case 'refresh'    :
                header("Refresh:0;url=" . $uri);
                break;
            default            :
                header("Location: " . $uri, TRUE, $http_response_code);
                break;
        }
        exit;
    }
}

// ------------------------------------------------------------------------

/**
 * Parse out the attributes
 *
 * Some of the functions use this
 *
 * @access    private
 * @param    array
 * @param    bool
 * @return    string
 */
if (!function_exists('_parse_attributes')) {
    function _parse_attributes($attributes, $javascript = FALSE) {
        if (is_string($attributes)) {
            return ($attributes != '') ? ' ' . $attributes : '';
        }

        $att = '';
        foreach ($attributes as $key => $val) {
            if ($javascript == TRUE) {
                $att .= $key . '=' . $val . ',';
            } else {
                $att .= ' ' . $key . '="' . $val . '"';
            }
        }

        if ($javascript == TRUE AND $att != '') {
            $att = substr($att, 0, -1);
        }

        return $att;
    }
}


/* End of file url_helper.php */
/* Location: ./system/helpers/url_helper.php */