PHP - Concatenate / cascade multidimensional array keys - php

Question

I've realized I need to stop banging my head and ask for help...
I have the following array:
$permissionTypes = array(
'system' => array(
'view' => 'View system settings.',
'manage' => 'Manage system settings.'
),
'users' => array(
'all' => array(
'view' => 'View all users.',
'manage' => 'Manage all users.'
)
),
'associations' => array(
'generalInformation' => array(
'all' => array(
'view' => 'View general information of all associations.',
'manage' => 'Manage general information of all associations.'
),
'own' => array(
'view' => 'View general information of the association the user is a member of.',
'manage' => 'Manage general information of the association the user is a member of.'
)
)
));
I'm trying to collapse / cascade the keys into a one-dimension array like so:
array(
'system_view',
'system_manage',
'users_all_view',
'users_all_manage',
'associations_generalInformation_all_view',
'associations_generalInformation_all_manage',
'associations_generalInformation_own_view',
'associations_generalInformation_own_manage'
)
I could use nested loops, but the array will be an undefined number of dimensions.
This is the closest I've gotten:
public function iterateKeys(array $array, $joiner, $prepend = NULL) {
if (!isset($formattedArray)) { $formattedArray = array(); }
foreach ($array as $key => $value) {
if(is_array($value)) {
array_push($formattedArray, $joiner . $this->iterateKeys($value, $joiner, $key));
} else {
$formattedArray = $prepend . $joiner . $key;
}
}
return $formattedArray;
}
Any ideas?

Answer 1

I think this should do it:
public function iterateKeys(array $array, $joiner, $prepend = NULL) {
if (!isset($formattedArray)) {
$formattedArray = array();
}
foreach ($array as $key => $value) {
if(is_array($value)) {
$formattedArray = array_merge($formattedArray, $this->iterateKeys($value, $joiner, $prepend . $joiner . $key));
} else {
$formattedArray[] = $prepend . $joiner . $key;
}
}
return $formattedArray;
}
Since the recursive call returns an array, you need to use array_merge to combine it with what you currently have. And for the non-array case, you need to push the new string onto the array, not replace the array with a string.

Answer 2

try this:
function flattern(&$inputArray, $tmp = null, $name = '')
{
if ($tmp === null) {
$tmp = $inputArray;
}
foreach($tmp as $index => $value) {
if (is_array($value)) {
flattern($inputArray, $value, $name.'_'.$index);
if (isset($inputArray[$index])) {
unset($inputArray[$index]);
}
} else {
$inputArray[$name.'_'.$index] = $value;
}
}
return $inputArray;
}
var_dump(flattern($permissionTypes));

Answer 3

function flattenWithKeys(array $array, array $path = []) {
$result = [];
foreach ($array as $key => $value) {
$currentPath = array_merge($path, [$key]);
if (is_array($value)) {
$result = array_merge($result, flattenWithKeys($value, $currentPath));
} else {
$result[join('_', $currentPath)] = $value;
}
}
return $result;
}
$flattened = flattenWithKeys($permissionTypes);

Answer 4

Working fine for me.
function array_key_append($source_array, $return_array = array(), $last_key = '', $append_with = "#")
{
if(is_array($source_array))
{
foreach($source_array as $k => $v)
{
$new_key = $k;
if(!empty($last_key))
{
$new_key = $last_key . $append_with . $k;
}
if(is_array($v))
{
$return_array = array_key_append($v, $return_array, $new_key, $append_with);
} else {
$return_array[$new_key] = $v;
}
}
}
return $return_array;
}
$StandardContactRequestDataforALL = array_key_append($StandardContactRequestDataforALL, $return_array = array(), $last_key = '', $append_with = "#");