Introducing compatibility layers
- Limited support for mbstring (mb_strlen(), mb_strpos(), mb_substr() only) via iconv.
Falls back to regular strlen(), strpos(), substr() if iconv is not available.
- Password hashing, dependant on CRYPT_BLOWFISH (2y version, available since PHP 5.3.7) availability.
diff --git a/system/core/compat/mbstring.php b/system/core/compat/mbstring.php
new file mode 100644
index 0000000..91ea801
--- /dev/null
+++ b/system/core/compat/mbstring.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst. It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
+ * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link http://codeigniter.com
+ * @since Version 3.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PHP ext/mbstring compatibility package
+ *
+ * @package CodeIgniter
+ * @subpackage CodeIgniter
+ * @category Compatibility
+ * @author Andrey Andreev
+ * @link http://codeigniter.com/user_guide/
+ * @link http://php.net/mbstring
+ */
+
+// ------------------------------------------------------------------------
+
+if (MB_ENABLED === TRUE)
+{
+ return;
+}
+
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('mb_strlen'))
+{
+ /**
+ * mb_strlen()
+ *
+ * WARNING: This function WILL fall-back to strlen()
+ * if iconv is not available!
+ *
+ * @link http://php.net/mb_strlen
+ * @param string $str
+ * @param string $encoding
+ * @return string
+ */
+ function mb_strlen($str, $encoding = NULL)
+ {
+ if (ICONV_ENABLED === TRUE)
+ {
+ return iconv_strlen($str, isset($charset) ? $charset : config_item('charset'));
+ }
+
+ log_message('debug', 'Compatibility (mbstring): iconv_strlen() is not available, falling back to strlen().');
+ return strlen($str);
+ }
+}
+
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('mb_strpos'))
+{
+ /**
+ * mb_strpos()
+ *
+ * WARNING: This function WILL fall-back to strpos()
+ * if iconv is not available!
+ *
+ * @link http://php.net/mb_strpos()
+ * @param string $haystack
+ * @param string $needle
+ * @param int $offset
+ * @param string $encoding
+ * @return mixed
+ */
+ function mb_strpos($haystack, $needle, $offset = 0, $encoding = NULL)
+ {
+ if (ICONV_ENABLED === TRUE)
+ {
+ return iconv_strpos($haystack, $needle, $offset, isset($encoding) ? $encoding : config_item('charset'));
+ }
+
+ log_message('debug', 'Compatibility (mbstring): iconv_strpos() is not available, falling back to strpos().');
+ return strpos($haystack, $needle, $offset);
+ }
+}
+
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('mb_substr'))
+{
+ /**
+ * mb_substr()
+ *
+ * WARNING: This function WILL fall-back to substr()
+ * if iconv is not available.
+ *
+ * @link http://php.net/mb_substr
+ * @param string $str
+ * @param int $start
+ * @param int $length
+ * @param string $encoding
+ * @return string
+ */
+ function mb_substr($str, $start, $length = NULL, $encoding = NULL)
+ {
+ if (ICONV_ENABLED === TRUE)
+ {
+ isset($encoding) OR $encoding = config_item('charset');
+ return iconv_substr(
+ $str,
+ $start,
+ isset($length) ? $length : iconv_strlen($str, $encoding), // NULL doesn't work
+ $encoding
+ );
+ }
+
+ log_message('debug', 'Compatibility (mbstring): iconv_substr() is not available, falling back to substr().');
+ return isset($length)
+ ? substr($str, $start, $length)
+ : substr($str, $start);
+ }
+}
+
+/* End of file mbstring.php */
+/* Location: ./system/core/compat/mbstring.php */
\ No newline at end of file