How to get linux console $COLUMNS and $ROWS from PHP cli?

I'm currently creating a new neat CLI library for PHP, and i'd like to figure out the width/height of the console it's running in.

I've tried many things like digging through $_ENV, exec("echo $COLUMNS"), etc, but no result, while if i type echo $COLUMNS or $ROWS in bash commandline, it neatly displays the value.

What do i need to do to access this value from PHP?

I'm using .sh scripts like this:

#!/usr/bin/php -q
<?php

require_once('lib.commandline.php');


class HelloWorld extends CommandLineApp {

  public function main($args) {

       echo('O, Hai.');
       
    }

}

Update Final solution:

public function getScreenSize() { 
      preg_match_all("/rows.([0-9]+);.columns.([0-9]+);/", strtolower(exec('stty -a |grep columns')), $output);
      if(sizeof($output) == 3) {
        $this->settings['screen']['width'] = $output[1][0];
        $this->settings['screen']['height'] = $output[2][0];
      }
    }