Combine array elements - php

Question

I want to loop through 3 arrays to create 1 single array with all 3 values in them.
See below for example and outcome.
Input:
array(
'0' => array(
'0' => array('a'),
'1' => array('b')
),
'1' => array(
'0' => array('c'),
'1' => array('d'),
'2' => array('e')
),
'2' => array(
'0' => array('f')
),
)
Outcome:
array(
'0' => 'acf',
'1' => 'adf',
'2' => 'aef',
'3' => 'bcf',
'4' => 'bdf',
'5' => 'bef'
)

Answer 1

Funnily I had the same problem a couple of years ago, so here's the solution I then came up with.
public static function combineElementsSuccessive($arry)
{
$result = [];
if (empty($arry) || !is_array($arry)) {
return result;
}
self::concatAndPush('', $result, $arry, 0);
return $result;
}
private static function concatAndPush($str, &$res_arry, $arry, $index)
{
foreach ($arry[$index] as $key => $val) {
$mod_str = $str . $val;
if (isset($arry[$index+1])) {
self::concatAndPush($mod_str, $res_arry, $arry, $index+1);
}
else {
$res_arry[] = $mod_str;
}
}
}
See it in action
Nevermind the static methods, I had to integrate them somehow in an application full of legacy code ;-)

Answer 2

How about this?
// $old_array = your original array
$new_array=array();
for ($i=0; $i<count($old_array[0]); $i++) {
for ($j=0; $j<count($old_array[1]); $j++) {
for ($k=0; $k<count($old_array[2]); $k++) {
$new_array[]=$old_array[0][$i].$old_array[1][$j].$old_array[2][$k];
}
}
}
var_dump($new_array);
It returns:
array(6) { [0]=> string(3) "acf" [1]=> string(3) "adf" [2]=> string(3) "aef" [3]=> string(3) "bcf" [4]=> string(3) "bdf" [5]=> string(3) "bef" }

Answer 3

Convert your array as following numbers array and run the code
$numbers = array(
array("a", "b"),
array("c", "d", "e"),
array("f"),
);
$f_nb = $numbers['0'];
$s_nb = $numbers['1'];
$t_nb = $numbers['2'];
$final_array = array();
for($a = 0; $a<sizeof($f_nb); $a++)
{
for($b = 0; $b<sizeof($s_nb); $b++)
{
for($c = 0; $c<sizeof($t_nb); $c++)
{
$final_array[] = $f_nb["$a"] . $s_nb["$b"] . $t_nb["$c"];
}
}
}
print_r($final_array);

Answer 4

Try this:
$array = array(
'0' => array(
'0' => array('a'),
'1' => array('b')
),
'1' => array(
'0' => array('c'),
'1' => array('d'),
'2' => array('e')
),
'2' => array(
'0' => array('f')
),
);
$outcome = array();
foreach ($array['0'] as $key => $value1)
{
foreach ($array['1'] as $value2)
{
foreach ($array['2'] as $value3)
{
$outcome[] = $value1[0].$value2[0].$value3[0];
}
}
}
print_r($outcome);