Security Helper

The Security Helper file contains security related functions.

Loading this Helper

This helper is loaded using the following code:

helper('security');

Available Functions

The following functions are available:

sanitize_filename($filename)
Parameters:
  • $filename (string) – Filename
Returns:

Sanitized file name
Return type:

string

Provides protection against directory traversal.

This function is an alias for \CodeIgniter\Security::sanitize_filename(). For more info, please see the Security Library documentation.

strip_image_tags($str)
Parameters:
  • $str (string) – Input string
Returns:

The input string with no image tags
Return type:

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);
encode_php_tags($str)
Parameters:
  • $str (string) – Input string
Returns:

Safely formatted string
Return type:

string

This is a security function that converts PHP tags to entities.

Example:

$string = encode_php_tags($string);