PHP - count unique arrays - count

Question

Array (
[0] => Array ( [0] => b [1] => d)
[1] => Array ( [0] => c [1] => a)
[2] => Array ( [0] => b [1] => d)
[3] => Array ( [0] => a [1] => d)
[4] => Array ( [0] => c )
[5] => Array ( [0] => a [1] => d [2] => e)
[6] => Array ( [0] => d [1] => b)
)
I would like to perform a count on unique inner arrays, so I can get a count similar to:
2 of b,d
1 of c,a
1 of a,d
1 of c
1 of a,d,e
1 of d,b
I looked at "implode" function, but I only get a listing of all values in the inner arrays instead of a count.
foreach ($result_array as &$pair)
{
$pair = implode(', ', $pair);
}

Answer 1

You were so close... Try this:
$original = array (
array ('b', 'd'),
array ('c', 'a'),
array ('b', 'd'),
array ('a', 'd'),
array ('c'),
array ('a', 'd', 'e'),
array ('d', 'b')
);
$result = array();
foreach ($original as $part) {
$key = implode(', ', $part);
if( ! array_key_exists ($key, $result)) {
$result[$key] = 0;
}
$result[$key] = $result[$key] + 1;
}
foreach ($result as $key => $value) {
echo "$value of {$key}<br/>";
}
Output:
2 of b, d
1 of c, a
1 of a, d
1 of c
1 of a, d, e
1 of d, b