how to make pairs of array value? - php

Question

I have an array something like that:
array('A','B','C','D','E');
and I want to make pairs of each value like that :
A, AB, ABC, ABCD, ABCDE
B, BC, BCD, BCDE
C, CD, CDE
D, DE
E
as an Array (ALL PAIRS SHOULD BE IN A SAME ARRAY).
And I have followed this Question:
How do I make pairs of array values?
But i'm not able to do that.
Please Help

Answer 1

For each of your inputs, loop between it and the end of the input array. For each result, add the range between the present and end inputs to your result.
$input = array('A', 'B', 'C', 'D', 'E');
$output = array();
for ($i = 0; $i < count($input); $i++) {
$row = array($input[$i]);
for ($j = $i + 1; $j < count($input); $j++) {
$row[] = implode('', range($input[$i], $input[$j]));
}
$output[] = $row;
}

Answer 2

$data = array('A','B','C','D','E');
$chars = count($data);
$combinations = array();
foreach ($data as $key => $startChar) {
$length = 0;
while ($length < $chars - $key) {
$combinations[] = implode(array_slice($data, $key, ++$length));
}
}
var_dump($combinations);

Answer 3

Looks like the format output:
$letters = array('A','B','C','D','E');
$result = array();
$x = 0;
while(count($letters) > 0) {
$l = array_shift($letters);
$result[$x][] = $l;
foreach($letters as $k => $letter){
$result[$x][] = $l . implode(array_slice($letters, 0, $k+1));
}
$result[$x] = implode(', ', $result[$x]);
$x++;
}
echo '<pre>';
print_r($result);