<?php
/**
* $path key.*.username *.password, *.1.username
*/
function pathCallback($path, array $data, $callback, $history = null) {
$parts = explode(".", $path);
$first = array_shift($parts);
$current = null;
if ($first === "*") {
$current = $data;
} else if (is_numeric($first)) {
$current = [array_values($data)[$first]];
} else {
$current = [$data[$first]];
}
$results = [];
$nextPath = implode(".", $parts);
$history .= ($history !== null ? "." : "") . $first;
foreach ($current as $key => $value) {
$nextHistory = str_replace("*", $key, $history);
if (!empty($parts)) {
$res = pathCallback($nextPath, $value, $callback, $nextHistory);
} else {
$res = [$nextHistory => $callback($value)];
}
$results = array_merge($results, $res);
}
return $results;
}
$data = [
[
"username" => "user1",
"address" => [
"street" => "street 1",
"postal" => "12345",
"city" => "city123",
"country" => [
"code" => "DE",
"name" => "Germany",
"locale" => "de_DE"
]
]
],
[
"username" => "user2",
"address" => [
"street" => "street 2",
"postal" => "54321",
"city" => "city123",
"country" => [
"code" => "DE",
"name" => "Germany",
"locale" => "de_DE"
]
]
]
];
$d = pathCallback("*.address.country.code", $data, function($v) { return "prefix_$v"; }) ;
var_dump($d);
