Php recursion to get all possibilities of strings

Question

Here is my code to get all possibilities:

$seq[1] = \'d\';
$seq[2] = \'f\';
$seq[3] = \'w\';
$seq[4] = \'s\';

for($i = 1; $i < 5; $i++)
{
    $s[\'length         


        

Answer 1

This is a standard permutation question, look in to "php permutations" if you need all variations of the string.