Binary Data Packing and Unpacking with PHP's pack() and unpack() Functions
pack() Function
string pack ( string $format [, mixed $args [, mixed $... ]] )
The pack() function converts arguments into a binary string according to the specified format.
Format Codes
Code
Description
a
NUL-padded string
A
Space-padded string
h
Hex string (low nibble first)
H
Hex string (high nibble first)
c
Signed char
C
U ...
Posted on Mon, 24 Aug 2026 16:32:17 +0000 by lazersam