What is the PHP function that returns the same thing as "(char) integer"?

Question

I have a code to convert from C# to PHP. This code has an integer to char conversion, and I’m not getting the same result.

Note: I know that PHP is not strongly typed, but in version 7.1 (I am using) it already works with typing.

Code in C# (link to simulate):

using System;
    public class Program {
    public static void Main()
    {   
        gerar(89012, 123456);
    }

    public static void gerar(int valor, int codigo) {
        char[] arr = new char[8];

        int v = Convert.ToInt32(valor); 
        arr[0] = (char)(codigo >> 23); 
        arr[1] = (char)((codigo >> 15) & 0xFF);
        arr[2] = (char)((codigo >> 7) & 0xFF);
        arr[3] = (char)((v >> 7) & 0xFF);
        arr[4] = (char)(v & 0xFF);

        Console.WriteLine("arr[0]: " + arr[0]);
        Console.WriteLine("arr[1]: " + arr[1]);
        Console.WriteLine("arr[2]: " + arr[2]);
        Console.WriteLine("arr[3]: " + arr[3]);
        Console.WriteLine("arr[4]: " + arr[4]);
    }
}

I’ve used this code converted to PHP ...

<?php
$arr = [];
$codigo = intval(123456);
$v = intval(89012);

$arr = [];
$codigo = intval(123456);
$v = intval(89012);
$arr[0] = ($codigo >> 23); 
$arr[1] = (($codigo >> 15) & 0xFF);
$arr[2] = (($codigo >> 7) & 0xFF);
$arr[3] = (($v >> 7) & 0xFF);
$arr[4] = ($v & 0xFF);

var_dump($arr[0]);
var_dump($arr[1]);
var_dump($arr[2]);
var_dump($arr[3]);
var_dump($arr[4]);
die;

... the functions:

• Chr()
• mb_chr()
• (string)
• strval()
• mb_convert_encoding() (both for UTF-16, UTF-8...)

And so far no one has made the same return....