CLI library : be able to print arrays or objects

I noted something strange : if I use print_r or d() between CLI:write commands, the result of these 2 commands are all written after all the CLI:write commands returns.

For example, the following code: 

PHP Code:

CLI::write('before');
print_r('print_r command');
d('d command');
CLI::write('after'); 


Will render :

Code:

before
sh: tput: not found
after
print_r command
┌──────────────────────────────────────────────────────────────────────────────┐
└──────────────────────────────────────────────────────────────────────────────┘
string (9) "d command"
════════════════════════════════════════════════════════════════════════════════
Called from .../modules/Electricite/Models/ReleveModel.php:37 [d()]

---

I created a custom library to add print_r et var_dump to CLI :

PHP Code:

<?php

namespace App\Libraries;

use CodeIgniter\CLI\CLI as BaseCLI;

class CLI extends BaseCLI
{

    /**
    * Outputs result of print_r to the cli on its own line.
    *
    * @return void
    */
    public static function print_r($data, ?string $foreground = null, ?string $background = null)
    {
        $toPrint = print_r($data, TRUE);
        CLI::write($toPrint, $foreground, $background);
    }

    /**
    * Outputs result of vaar_dump to the cli on its own line.
    *
    * @return void
    */
    public static function var_dump($data, ?string $foreground = null, ?string $background = null)
    {
        ob_start();
        var_dump($data);
        $toPrint = ob_get_contents();
        ob_end_clean();

        CLI::write($toPrint, $foreground, $background);
    }
}