Problem in Class Mat

[BbenWeb1]

Hello
Try trying the following coding

<?php 
namespace  CV;
use CV\Mat;
use CV\Scalar;
$mat = new Mat(2, 2, CV_8UC3, new Scalar(0,0,255));
echo "M = \r\n";
$mat->print();
?> 

In windows it displays the following
M = [ ]
In wsl2 ubuntu it displays the following
M = [ 0, 0, 255, 0, 0, 255; 0, 0, 255, 0, 0, 255]