Security Helper
The Security Helper file contains security related functions.
Loading this Helper
This helper is loaded using the following code:
$this->load->helper('security');
The following functions are available:
xss_clean()
Provides Cross Site Script Hack filtering. This function is an alias to the one in the Input class. More info can be found there.
sanitize_filename()
Provides protection against directory traversal. This function is an alias to the one in the Security class. More info can be found there.
do_hash()
Permits you to create SHA1 or MD5 one way hashes suitable for encrypting passwords. Will create SHA1 by default. Examples:
$str = do_hash($str); // SHA1
$str = do_hash($str, 'md5'); // MD5
Note: This function was formerly named dohash(), which has been deprecated in favour of do_hash().
strip_image_tags()
This is a security function that will strip image tags from a string. It leaves the image URL as plain text.
$string = strip_image_tags($string);
encode_php_tags()
This is a security function that converts PHP tags to entities. Note: If you use the XSS filtering function it does this automatically.
$string = encode_php_tags($string);