February 2013
Intermediate to advanced
538 pages
20h 55m
English
Content preview from Programming PHP, 3rd Edition
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Name
pack
Synopsis
string pack(stringformat, mixedarg1[, mixedarg2[, ... mixedargN]])
Creates a binary string containing packed versions of the given
arguments according to format. Each character may be followed by a
number of arguments to use in that format, or an asterisk (*), which uses all arguments to the end of
the input data. If no repeater argument is specified, a single
argument is used for the format character. The following characters
are meaningful in the format string:
| NUL-byte-padded string |
| Space-padded string |
| Hexadecimal string, with the low nibble first |
| Hexadecimal string, with the high nibble first |
| Signed char |
| Unsigned char |
| 16-bit, machine-dependent byte-ordered signed short |
| 16-bit, machine-dependent byte-ordered unsigned short |
| 16-bit, big-endian byte-ordered unsigned short |
| 16-bit, little-endian byte-ordered unsigned short |
| Machine-dependent size and byte-ordered signed integer |
| Machine-dependent size and byte-ordered unsigned integer |
| 32-bit, machine-dependent byte-ordered signed long |
| 32-bit, machine-dependent byte-ordered unsigned long |
| 32-bit, big-endian byte-ordered unsigned long |
| 32-bit, little-endian byte-ordered unsigned long |
| Float in machine-dependent size and representation |
| Double in machine-dependent size and representation |
| NUL-byte |
| Back up one byte |
| Fill to absolute position (given by the repeater argument) with NUL-bytes |
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.