Convert array keys to a string in PHP - php

Question

Example Array:
$array = array([key1] =>
array([key11] =>
array([key111] => 'value111',
[key112] => 'value112',
[key113] => 'value113',
[key114] => array(A,B,C,D),
),
),
);
I need an output as below array:
array([key1/key11/key111] => 'value111',
[key1/key11/key112] => 'value112',
[key1/key11/key113] => 'value113',
[key1/key11/key114] => 'A,B,C,D' );
and i have tried using this function,
function listArrayRecursive($someArray, &$outputArray, $separator = "/") {
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($someArray), RecursiveIteratorIterator::SELF_FIRST);
foreach ($iterator as $k => $v) {
if (!$iterator->hasChildren()) {
for ($p = array(), $i = 0, $z = $iterator->getDepth(); $i <= $z; $i++) {
$p[] = $iterator->getSubIterator($i)->key();
}
$path = implode($separator, $p);
$outputArray[] = $path;
}
}
}
$outputArray = array();
listArrayRecursive($array, $outputArray);
I cant able to find how to achieve this by using the above function for "key1/key11/key114" getting value as i expected. Please help me on this.

Answer 1

Input:
$array = array(
'key1' => array(
'key11' => array(
'key111' => 'value111',
'key112' => 'value112',
'key113' => 'value113',
'key114' => array('A','B','C','D'),
),
'key12' => array(
'key121' => 'value121',
'key122' => 'value122',
'key123' => 'value123',
'key124' => array('A','B','C','D'),
),
),
'key2' => array(
'key21' => array(
'key211' => 'value111',
'key212' => 'value112',
'key213' => 'value113',
'key214' => array('A','B','C','D'),
),
),
);
Script:
function remap_keys($input, $max_depth, $separator = '/', /* reserved */ $keychain = array(), /* reserved */ &$output = array())
{
foreach ($input as $key => $element)
{
$element_keychain = array_merge($keychain, (array)$key);
if (($max_depth > 1) && is_array($element))
remap_keys($element, $max_depth -1, $separator, $element_keychain, $output);
else
$output[implode($separator, $element_keychain)] = implode(',', (array)$element);
}
return $output;
}
$array = remap_keys($array, 3);
print_r($array);
Output:
Array
(
[key1/key11/key111] => value111
[key1/key11/key112] => value112
[key1/key11/key113] => value113
[key1/key11/key114] => A,B,C,D
[key1/key12/key121] => value121
[key1/key12/key122] => value122
[key1/key12/key123] => value123
[key1/key12/key124] => A,B,C,D
[key2/key21/key211] => value111
[key2/key21/key212] => value112
[key2/key21/key213] => value113
[key2/key21/key214] => A,B,C,D
)
http://ideone.com/pqH45h

Answer 2

$array = array('key1' =>
array('key11' =>
array('key111' => 'value111',
'key112' => 'value112',
'key113' => 'value113',
'key114' => array(A,B,C,D),
),
),
);
function implode_arr_keys($array, $output_arr = array(), $cur_key = FALSE) {
foreach($array as $key => $value) {
if(is_array($value)) {
return implode_arr_keys($value, $output_arr, ($cur_key == FALSE ? $key : $cur_key.'/'.$key));
} else {
if(!is_numeric($key))
$output_arr[$cur_key.'/'.$key] = $value;
else
$output_arr[$cur_key] = $array;
}
}
return $output_arr;
}
print_r($array);
print_r(implode_arr_keys($array));