shortcodes for ci4

I had one that worked. This might be a php issue. The $shortcode_array() comes back as undefined even though I am passing information to it. Any ideas on why it is returning undefined?

PHP Code:

    public function parse ($str)
    {
        // Check for existing shortcodes
        if (! strstr($str, '[ai:')) {
            return $str;
        }
        
        // Find matches against shortcodes like [ai:user id=1|class=admin]
        preg_match_all('/\[ai:([a-zA-Z0-9-_: |=\.]+)]/', $str, $shortcodes);
        
        if ($shortcodes == NULL) {
            return $str;
        }
        
        // Tidy up
        foreach ($shortcodes[1] as $key => $shortcode) {
            if (strstr($shortcode, ' ')) {
                $code = substr($shortcode, 0, strpos($shortcode, ' '));
                $tmp = explode('|', str_replace($code . ' ', '', $shortcode));
                $params = array();
                if (count($tmp)) {
                    foreach ($tmp as $param) {
                        $pair = explode('=', $param);
                        $params[$pair[0]] = $pair[1];
                    }
                }
                $array = array('code' => $code, 'params' => $params);
            }
            else {
                $array = array('code' => $shortcode, 'params' => array());
            }
            
            $shortcode_array[$shortcodes[0][$key]] = $array;
        }
        
        // Replace shortcode instances with HTML strings
        if (count($shortcode_array)) {
            
            // Find the appropriate model for every shortcode, load it and call $model->run($params)
            $path = realpath(APPPATH.'/models/shortcodes/') . '/';
            
            foreach ($shortcode_array as $search => $shortcode) {
                $shortcode_model = $shortcode['code'];
                if (file_exists($path . $shortcode_model . '.php') && is_file($path . $shortcode_model . '.php')) {
                    $this->_ci->load->model('shortcodes/' . $shortcode_model);
                    $str = str_replace($search, $this->_ci->$shortcode_model->run($shortcode['params']), $str);
                }
            
            }
        }
        
        // Return the entire parsed string
        return $str;
    } 


With some changes i managed to get this to work. You just need to put the model of your shortcode into the models folder. Below is a quick example.
First in common.php I have this function

PHP Code:

    function parse_shortcode($str)
    {
        // Check for existing shortcodes
        if (! strstr($str, '[ai:')) {
            return $str;
        }
        
        // Find matches against shortcodes like [ai:user id=1|class=admin]
        preg_match_all('/\[ai:([a-zA-Z0-9-_: |=\.]+)]/', $str, $shortcodes);
        
        if ($shortcodes == NULL) {
            return $str;
        }
        
        // Tidy up
        foreach ($shortcodes[1] as $key => $shortcode) {
            if (strstr($shortcode, ' ')) {
                $code = substr($shortcode, 0, strpos($shortcode, ' '));
                $tmp = explode('|', str_replace($code . ' ', '', $shortcode));
                $params = array();
                if (count($tmp)) {
                    foreach ($tmp as $param) {
                        $pair = explode('=', $param);
                        $params[$pair[0]] = $pair[1];
                    }
                }
                $array = array('code' => $code, 'params' => $params);
            }
            else {
                $array = array('code' => $shortcode, 'params' => array());
            }
            
            $shortcode_array[$shortcodes[0][$key]] = $array;
        }
        
        // Replace shortcode instances with HTML strings
        if (count($shortcode_array)) {
            
            // Find the appropriate model for every shortcode, load it and call $model->run($params)
            $path = realpath(APPPATH.'/Models/') . '/';
            
            foreach ($shortcode_array as $search => $shortcode) {
                $shortcode_model = $shortcode['code'];
                if (file_exists($path . $shortcode_model . '.php') && is_file($path . $shortcode_model . '.php')) {
                    $shortcode_model = model($shortcode_model);
                    //load->model('shortcodes/' . $shortcode_model);
                    $str = str_replace($search, $shortcode_model->run_short($shortcode['params']), $str);
                }
            
            }
        }
        
        // Return the entire parsed string
        return $str;
    } 


Now if I use my string in my page database
[ai:nav id=6|theme=navbar-default|pos=navbar-fixed-top|type=bar]

I run parse_shortcode() over this string which loads the Nav.php model
Right now I have nothing in it, You can define as many parameters as you like.

PHP Code:

<?php

namespace App\Models;

use CodeIgniter\Model;

class Nav extends Model
{
    
    public function run_short($params = array())
 {
 $id = isset($params['id']) ? $params['id'] : '0';
 $theme = isset($params['theme']) ? $params['theme'] : 'navbar-default';
 $pos = isset($params['pos']) ? $params['pos'] : '';
 $type = isset($params['type']) ? $params['type'] : 'bar'; //bar or pills
 $str = 'replaced';
 return $str;
   }
} 


You can even throw some database code to pull whatever you like from the database.

I hope this helps someone else get shortcodes. Cause they are awesome.

Oddly I put this on a new server and its not loading my shortcodes. Is there a php setting that would cause this to break?  I have it working on another host, but on a fresh server setup it is not loading the model files, or parsing the code. Any help would be appreicated.

EDIT: Nevermind, it wasn't working cause I was using shortcode with a lowercase like [ai:grid] when the model is Grid.php I guess the other host I use didn't have case sensitivity.