how to find next index in php array?

I have multidimensional array with mixed index ie int and string values.

ex.

['abc'][p][8][5]['amol']['jon']

at Ce开发者_如何学运维rtain point i know the need to check index after index 'abc' , whether it is int or string how can i do that?

next($array);             //> Advancing
is_numeric(key($array));  //> Checking

http://fi2.php.net/manual/en/function.key.php

function array_key_relative($array, $current_key, $offset = 1) 
{ // create key map $keys = array_keys($array); 
// find current key $current_key_index = array_search($current_key, $keys); 
// return desired offset, if in array, or false if not 
if(isset($keys[$current_key_index + $offset])) 
{ return $keys[$current_key_index + $offset]; } return false; 
}

then use is_int() to check int or string.