--TEST--
Closure 008: Use in preg_replace_callback()
--FILE--
<?php

function replace_spaces($text) {
    $lambda = function ($matches) {
        return str_replace(' ', '&nbsp;', $matches[1]).' ';
    };
    return preg_replace_callback('/( +) /', $lambda, $text);
}

echo replace_spaces("1 2 3\n");
echo replace_spaces("1  2  3\n");
echo replace_spaces("1   2   3\n");
echo "Done\n";
?>
--EXPECT--
1 2 3
1&nbsp; 2&nbsp; 3
1&nbsp;&nbsp; 2&nbsp;&nbsp; 3
Done