xss_clean($str[, $is_image = FALSE])

encode_php_tags($str)

xss_clean($str[, $is_image = FALSE])

sanitize_filename($filename)

get_random_bytes($length)

get_csrf_token_name()

sanitize_filename($str[, $relative_path = FALSE])

strip_image_tags($str)

get_csrf_hash()

class CI_Security xss_clean($str[, $is_image = FALSE])