preg match - Calling string in separate file in CodeIgniter -

i'm building profanity/racial slur filter website. have working, preg_match string quite long. i'm wondering if there way host long string in separate file in codeigniter , call when need in preg_match.

i have googled , couldn't find anything, thought ask here.

what i'm doing hosting string in model , calling this:

if(preg_match($filterregex)){   databasestuffhere(); } 

here few options. depending on how , using string , function, 1 may better others.

config

you store value config, in application/config/config.php

$config['filter_regex'] = 'yourreallylongstring'; 

the primary config auto-loaded codeigniter, can use so:

$filterregex = $this->config->item('filter_regex'); if(preg_match($filterregex, $subject)) {     databasestuffhere(); } 

constant

if you're using long string in several places , useful have global access, define as constant in application/config/constants.php. prevent accidentally redefining value.

define('filter_regex', 'yourreallylongstring'); 

then use function this:

$filterregex = filter_regex; if(preg_match($filterregex, $subject)) {     databasestuffhere(); } 

helper

finally, use helper. can load helper when required, or auto-load it. can create own helper in application/helpers/. this:

<?php if ( ! defined('basepath')) exit('no direct script access allowed');  if ( ! function_exists('filter_slurs')) {     function filter_slurs($subject = '')     {         $filter_regex = 'yourreallylongstring';         if (preg_match($filter_regex, $subject))         {             return false;         }         else         {             return true;         }     }    } 

having function handle may make code easier follow , more meaningful, example, in controller, use this:

$this->load->helper('slur_filter_helper');  //assumes helper file is: slur_filter_helper.php  if(filter_slurs($subject)) {     //do } else {     //do else }