xss_clean($str[, $is_image = FALSE])
encode_php_tags($str)
get_random_bytes($length)
get_csrf_token_name()
sanitize_filename($filename)
class CI_Security xss_clean($str[, $is_image = FALSE])
get_csrf_hash()
sanitize_filename($str[, $relative_path = FALSE])
strip_image_tags($str)
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