In PHP, how do I convert a string to a UTF-8 byte array?

In PHP, how do I convert a string to a UTF-8 byte array? The implementation in Java is GetBytes ("UTF-8"), which is equivalent to this.

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In PHP, how do I convert a string to a UTF-8 byte array? The implementation in Java is GetBytes ("UTF-8"), which is equivalent to this.

unpack

Reference connection:
http://php.net/manual/en/function.pack.php
http://php.net/manual/en/function.unpack.php

test.php

Test.java

import java.io.*;public class Test{ public static void main(String args[]){ String Str1 = new String("在php中"); try{ byte[] bytes = Str1.getBytes("UTF-8"); StringBuilder sb = new StringBuilder(); for (byte b : bytes) { sb.append(String.format("%d ", b & 0xff)); } System.out.println(sb.toString()); }catch( UnsupportedEncodingException e){ System.out.println("Unsupported character set"); } }}

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