如何在PHP中将整数转换为字节数组 [英] How to convert integer to byte array in php

问题描述

如何将整数转换为4个字节的数组?

how would I convert an integer to an array of 4 bytes?

这是我想移植的确切代码(在C#中)

Here is the exact code I want to port (in C#)

int i = 123456;
byte[] ar = BitConverter.GetBytes(i);
// ar will contain {64, 226, 1, 0}

我将如何在PHP中做完全相同的事情?

How would I do the exact same thing in PHP ?

推荐答案

等效的转换是

$i = 123456;
$ar = unpack("C*", pack("L", $i));

查看实际效果 .

See it in action.

您应该知道字节顺序(小/大字节序)取决于计算机体系结构(在BitConverter情况下也是如此).那可能是好事，也可能不是好事.

You should be aware though that the byte order (little/big endian) is dependent on the machine architecture (as it is also in the case of BitConverter). That might or might not be good.

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