什么是实时使用PHP包和解包函数? [英] What is the realtime use of PHP pack and unpack function?
问题描述
echo pack(ssssss,0x809,0x8, 0x0,0x10,0x0,0x0);
完全是这样做的吗?
(总是16位,机器字节顺序)
我不知道为什么我不能够实时理解这个。
不要求理论上的答案
当我执行php时,文件生成了一些不被ms excel识别的stange字符。
我只想知道使用pack(),在哪里使用以及如何使用?
pack
通常用于生成原始二进制数据。例如,我在用于生成zip文件之前看到本地函数/类在PHP中是可用的。
I saw some file generation codes which uses the pack function.
echo pack("ssssss", 0x809, 0x8, 0x0, 0x10, 0x0, 0x0);
What this is doing exactly?
s signed short (always 16 bit, machine byte order)
I dont know why i am not able to understand this in realtime. Am not asking a theoretical answer
When i execute the php , file got generated with some stange characters which is not identified by ms excel.
I just want to know the use of pack(), where to use and how to use?
pack
is generally used to generate raw binary data. For example, I saw it used to generate zip files before native functions/classes were available in PHP for that.
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