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-###############
-Security Helper
-###############
-
-The Security Helper file contains security related functions.
-
-.. contents::
- :local:
-
-.. raw:: html
-
- <div class="custom-index container"></div>
-
-Loading this Helper
-===================
-
-This helper is loaded using the following code::
-
- $this->load->helper('security');
-
-Available Functions
-===================
-
-The following functions are available:
-
-
-.. php:function:: xss_clean($str[, $is_image = FALSE])
-
- :param string $str: Input data
- :param bool $is_image: Whether we're dealing with an image
- :returns: XSS-clean string
- :rtype: string
-
- Provides Cross Site Script Hack filtering.
-
- This function is an alias for ``CI_Input::xss_clean()``. For more info,
- please see the :doc:`Input Library <../libraries/input>` documentation.
-
-.. php:function:: sanitize_filename($filename)
-
- :param string $filename: Filename
- :returns: Sanitized file name
- :rtype: string
-
- Provides protection against directory traversal.
-
- This function is an alias for ``CI_Security::sanitize_filename()``.
- For more info, please see the :doc:`Security Library <../libraries/security>`
- documentation.
-
-.. php:function:: strip_image_tags($str)
-
- :param string $str: Input string
- :returns: The input string with no image tags
- :rtype: string
-
- This is a security function that will strip image tags from a string.
- It leaves the image URL as plain text.
-
- Example::
-
- $string = strip_image_tags($string);
-
- This function is an alias for ``CI_Security::strip_image_tags()``. For
- more info, please see the :doc:`Security Library <../libraries/security>`
- documentation.
-
-
-.. php:function:: encode_php_tags($str)
-
- :param string $str: Input string
- :returns: Safely formatted string
- :rtype: string
-
- This is a security function that converts PHP tags to entities.
-
- .. note:: :php:func:`xss_clean()` does this automatically, if you use it.
-
- Example::
-
- $string = encode_php_tags($string);