CODEWITHSUNDEEP
phphexbyte
Raaj Lokanathan
Raaj Lokanathan

Reputation: 479

How to convert Hex to Byte using PHP

I am currently having problem to convert Hex value into byte using PHP. Are there any way to do this?

This is the Hex value I want to convert to Byte : 02 05 12 E6 A3

I have tried pack() function and also chr() function but It didnt helped me on it. Can I know are there any way to solve this. Thanks in advance

Upvotes: 1

Views: 2279

Answers (1)

Deep Kakkar
Deep Kakkar

Reputation: 6305

Choose Pack() function for this task. The pack() function packs data into a binary string. It's syntax is pack(format,args+). format is required parameter while args is optional. It specifies the format to use when packing data. There are various formats as follows: 

a - NUL-padded string
A - SPACE-padded string
h - Hex string, low nibble first
H - Hex string, high nibble first
c - signed char
C - unsigned char
s - signed short (always 16 bit, machine byte order)
S - unsigned short (always 16 bit, machine byte order)
n - unsigned short (always 16 bit, big endian byte order)
v - unsigned short (always 16 bit, little endian byte order)
i - signed integer (machine dependent size and byte order)
I - unsigned integer (machine dependent size and byte order)
l - signed long (always 32 bit, machine byte order)
L - unsigned long (always 32 bit, machine byte order)
N - unsigned long (always 32 bit, big endian byte order)
V - unsigned long (always 32 bit, little endian byte order)
f - float (machine dependent size and representation)
d - double (machine dependent size and representation)
x - NUL byte
X - Back up one byte
Z - NUL-padded string
@ - NUL-fill to absolute position

note: The "Z" code was added in PHP 5.5 with the same functionality as "a" for Perl compatibility

Upvotes: 1

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