File cms/html/email.php | Joomla! Framework TM

  1 <?php
  2 /**
  3  * @package     Joomla.Libraries
  4  * @subpackage  HTML
  5  *
  6  * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
  7  * @license     GNU General Public License version 2 or later; see LICENSE.txt
  8  */
  9 
 10 defined('JPATH_PLATFORM') or die;
 11 
 12 /**
 13  * Utility class for cloaking email addresses
 14  *
 15  * @since  1.5
 16  */
 17 abstract class JHtmlEmail
 18 {
 19     /**
 20      * Simple JavaScript email cloaker
 21      *
 22      * By default replaces an email with a mailto link with email cloaked
 23      *
 24      * @param   string   $mail    The -mail address to cloak.
 25      * @param   boolean  $mailto  True if text and mailing address differ
 26      * @param   string   $text    Text for the link
 27      * @param   boolean  $email   True if text is an email address
 28      *
 29      * @return  string  The cloaked email.
 30      *
 31      * @since   1.5
 32      */
 33     public static function cloak($mail, $mailto = true, $text = '', $email = true)
 34     {
 35         // Handle IDN addresses: punycode for href but utf-8 for text displayed.
 36         if ($mailto && (empty($text) || $email))
 37         {
 38             // Use dedicated $text whereas $mail is used as href and must be punycoded.
 39             $text = JStringPunycode::emailToUTF8($text ?: $mail);
 40         }
 41         elseif (!$mailto)
 42         {
 43             // In that case we don't use link - so convert $mail back to utf-8.
 44             $mail = JStringPunycode::emailToUTF8($mail);
 45         }
 46 
 47         // Convert mail
 48         $mail = static::convertEncoding($mail);
 49 
 50         // Random hash
 51         $rand = md5($mail . mt_rand(1, 100000));
 52 
 53         // Split email by @ symbol
 54         $mail       = explode('@', $mail);
 55         $mail_parts = explode('.', $mail[1]);
 56 
 57         if ($mailto)
 58         {
 59             // Special handling when mail text is different from mail address
 60             if ($text)
 61             {
 62                 // Convert text - here is the right place
 63                 $text = static::convertEncoding($text);
 64 
 65                 if ($email)
 66                 {
 67                     // Split email by @ symbol
 68                     $text = explode('@', $text);
 69                     $text_parts = explode('.', $text[1]);
 70                     $tmpScript = "var addy_text" . $rand . " = '" . @$text[0] . "' + '&#64;' + '" . implode("' + '&#46;' + '", @$text_parts)
 71                         . "';";
 72                 }
 73                 else
 74                 {
 75                     $tmpScript = "var addy_text" . $rand . " = '" . $text . "';";
 76                 }
 77 
 78                 $tmpScript .= "document.getElementById('cloak" . $rand . "').innerHTML += '<a ' + path + '\'' + prefix + ':' + addy"
 79                     . $rand . " + '\'>'+addy_text" . $rand . "+'<\/a>';";
 80             }
 81             else
 82             {
 83                 $tmpScript = "document.getElementById('cloak" . $rand . "').innerHTML += '<a ' + path + '\'' + prefix + ':' + addy"
 84                     . $rand . " + '\'>' +addy" . $rand . "+'<\/a>';";
 85             }
 86         }
 87         else
 88         {
 89             $tmpScript = "document.getElementById('cloak" . $rand . "').innerHTML += addy" . $rand . ";";
 90         }
 91 
 92         $script       = "
 93                 document.getElementById('cloak" . $rand . "').innerHTML = '';
 94                 var prefix = '&#109;a' + 'i&#108;' + '&#116;o';
 95                 var path = 'hr' + 'ef' + '=';
 96                 var addy" . $rand . " = '" . @$mail[0] . "' + '&#64;';
 97                 addy" . $rand . " = addy" . $rand . " + '" . implode("' + '&#46;' + '", $mail_parts) . "';
 98                 $tmpScript
 99         ";
100 
101         // TODO: Use inline script for now
102         $inlineScript = "<script type='text/javascript'>" . $script . "</script>";
103 
104         return '<span id="cloak' . $rand . '">' . JText::_('JLIB_HTML_CLOAKING') . '</span>' . $inlineScript;
105     }
106 
107     /**
108      * Convert encoded text
109      *
110      * @param   string  $text  Text to convert
111      *
112      * @return  string  The converted text.
113      *
114      * @since   1.5
115      */
116     protected static function convertEncoding($text)
117     {
118         $text = html_entity_decode($text);
119 
120         // Replace vowels with character encoding
121         $text = str_replace('a', '&#97;', $text);
122         $text = str_replace('e', '&#101;', $text);
123         $text = str_replace('i', '&#105;', $text);
124         $text = str_replace('o', '&#111;', $text);
125         $text = str_replace('u', '&#117;', $text);
126         $text = htmlentities($text, ENT_QUOTES, 'UTF-8', false);
127 
128         return $text;
129     }
130 }
131
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