Input type checkbox in php not same in html

If i want to disable a checkbox with html i need to insert it in input tag.

<input type="checkbox" class="someone" name="any"  disabled> html

But if i want to build it with PHP and disable depends on a condition i will write:

$question = 'foo';
        echo '<input type="checkbox" class="someone" name="any"';
                if ($question == 'foo'){
                    echo 'disabled';
                }
                echo '">php';
                echo '<br>';
                echo '<input type="checkbox" class="someone" name="any"  disabled> html';

If you try you will see form google devtools that are write at same way but only html works

Why????