How can I change the key name of an array to the key value of the second array if the array length is the same?

How to change the key name of an array to the key value of the second array when the array length is the same. For example, I have $ aa .... $ bb $ aaArray & nbsp; (0 & nbsp; & gt; cd, 1 & nbsp; & gt; udd, 2 & gt; dsd); $ bbArray & nbsp; (& nbsp; 0 & nbsp; & gt; & nbsp; 13ds, 1 & nbsp; & gt; the length of the tdfe array is the same, how to change the key name of an array to the key value of the second array.
For example, I have $ aa... $ bb

$ Aa = Array ("0" => "cd", "1" => "udd", "2" => "dsd ");
$ Bb = Array ("0" => 13ds, "1" => "tdfestsdfa1", "2" => "1122sdfdsasdf33abc ");
Convert the key name of the $ aa array to the key value of the second array $ bb.

How to form the following array ￥ cc.

$ Cc = Array ("cd" => 13ds, "udd" => "tdfestsdfa1", "dsd" => "1122sdfdsasdf33abc ");

Please kindly advise.
------ Solution ----------------------

$aa = Array("0" => "cd", "1" => "udd","2" => "dsd");
$bb = Array("0" => "13ds", "1" => "tdfestsdfa1", "2" => "1122sdfdsasdf33abc");
$cc = array_combine($aa, $bb);
print_r($cc);

$aa = Array("0" => "cd", "1" => "udd","2" => "dsd");
$bb = Array("0" => "13ds", "1" => "tdfestsdfa1", "2" => "1122sdfdsasdf33abc");
$cc = array_combine($aa, $bb);
print_r($cc);