How to convert array encoding in php

unserialize(iconv('gbk','utf-8',serialize($array)));

The result is blank.

With the help of var_export function, the final function is as follows:

function array_iconv($in_charset,$out_charset,$arr){
 return eval('return '.iconv($in_charset,$out_charset,var_export($arr,true).';'));
 }

Principle analysis: In the var_export function, set the second parameter to true, return the array prototype string, convert the string to utf-8 encoding, and then use eval to perform the return (similar to an anonymous function?). This easily solves the problem of array encoding conversion in php.