如何使用php [preferred]或javaScript打印以下内容？ [关闭]

So i was asked the following question in an interview. I was able to print the whole xxx thing. but it was not diagonal like the below one. I think it meant to have spaces prints through a loop. Can Someone please help me with this.

How to print the following using php or javascript?? Php would be preferred.

     xx
    xxxx
   xxxxxx
  xxxxxxxx
 xxxxxxxxxx

what i was able to get was

xx
xxxx
xxxxxx
xxxxxxxx
xxxxxxxxxx 

through php for loop.

A solution in Javascript:

function tree(base) {
    var i = base,
        j;
    document.write('<pre>');

    while (i--) {
        j = i;
        while (j--) {
            document.write('&nbsp;');
        }
        j = base * 2 - i * 2;
        while (j--) {
            document.write('X');
        }
        document.write('<br>');
    }
    document.write('</pre>');
}

tree(5);
tree(10);

</div>

Simple example

<?php

    $char       = "x";
    $multiplier = 2;
    $repeat     = 5;

    for ($i = 1; $i <= $repeat; $i++) {

        $output = null;

        for ($j = 1; $j <= $multiplier*$i; $j++) {

            $output .= $char;

        }

        $nbsp = null;

        for ($k = 1; $k <= ($repeat-$i)*$multiplier; $k++) {

            $nbsp .= "&nbsp;";

        }

        echo $nbsp . $output . "<br/>";

    }

?>