String을 char 배열로 변환

1 Java[ | ]

public class MyClass {
    public static void main(String args[]) {
        String str = "ABC안녕123★";
        char[] chs = str.toCharArray();
        for(int i=0; i<chs.length; i++) System.out.printf("%c, ",chs[i]);
        // A, B, C, 안, 녕, 1, 2, 3, ★, 
        System.out.println( java.util.Arrays.toString(chs) );
        // [A, B, C, 안, 녕, 1, 2, 3, ★]
    }
}

2 PHP[ | ]

ASCII
<?php
$str = "ABC123Hello";
$arr = str_split($str);
foreach($arr as $ch) echo "$ch ";
// A B C 1 2 3 H e l l o
UTF-8
<?php
$str = "ABC안녕123★";
$arr = preg_split('//u', $str, null, PREG_SPLIT_NO_EMPTY);
foreach($arr as $ch) echo "$ch ";
// A B C 안 녕 1 2 3 ★
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