Translate a string with point separated into array keys - php

Question

I have an string (like one.two.three or month.2) and I need to translate this string exploding point character into array keys.
So I have month.2 and I need the codeline to translate this string into $lang['month'][2]
I was looking for that solution but I am not able to find it, I am blocked.
I finally found this:
<?php
$lang['one']['two']['three'] = 'well done';
$str = 'one.two.three';
$list = explode('.', $str);
$result = '$lang';
foreach ($list as $item)
{
$result .= '["'.$item.'"]';
}
var_dump(eval("return " . $result.';'));
?>

Answer 1

Start by exploding it:
$in = explode('.', $in);
Then rewrite it as a nested array:
$arg = array();
foreach (array_reverse($in) as $key) {
$arg = array($key => $arg);
}
And finally merge:
$out = array_merge_recursive($arg, $out);
Edit: in case you're seeking to read the array instead, then bazmegakapa's answer is what you're looking for.

Answer 2

I wrote a little recursive function to handle this. First you explode the string, and pass the array ($lang in your example, $a in mine) and this exploded array to GetVal(). It will do its best to return the needed value into $x.
$s="month.2";
$keys=explode('.', $s);
$a=array(
'month' => array('1' => 'fos', '2' => 'fos2'),
'retek' => 1
);
function GetVal($array, $keyarray) {
$key=array_shift($keyarray);
if (array_key_exists($key, $array)) {
if (count($keyarray)==0) {
return $array[$key];
} else {
return GetVal($array[$key], $keyarray);
}
} else {
return null;
}
}
$x=GetVal($a, $keys);
var_dump($x);

Answer 3

Its a clarification for the use of explode function:
<?php
$str = "Hello world. It's a beautiful day.";
print_r (explode(" ",$str));
?>
this code explodes as:
Array
(
[0] => Hello
[1] => world.
[2] => It's
[3] => a
[4] => beautiful
[5] => day.
)
not as Array[hello][world][its][a].......