PHP unpack() Function
 Complete PHP Misc Reference
Definition and Usage
The unpack() function unpacks data from a binary string.
This function returns an array on success, or FALSE on failure.
Syntax
| Parameter |
Description |
| format |
Required. Specifies the format to use when unpacking data.
Possible values:
- 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
- @ - NUL-fill to absolute position
|
| data |
Required. Specifies the binary data to be unpacked |
Example 1
<?php
$data = "PHP";
print_r(unpack("C*",$data));
?>
|
The output of the code above will be:
Array
(
[1] => 80
[2] => 72
[3] => 80
)
|
Example 2
<?php
$data = "PHP";
print_r(unpack("C*myint",$data));
?>
|
The output of the code above will be:
Array
(
[myint1] => 80
[myint2] => 72
[myint3] => 80
)
|
Example 3
<?php
$bin = pack("c2n2",0x1234,0x5678,65,66);
print_r(unpack("c2chars/n2int",$bin));
?>
|
The output of the code above will be:
Array
(
[chars1] => 52
[chars2] => 120
[int1] => 65
[int2] => 66
)
|
Complete PHP Misc Reference
 |
 |
 |
 |
|
The Ektron Intranet
lets you do everything you need to do on your corporate intranet and everything you want to do... all with just one application.
What can you do with the Ektron Intranet? |
 |
Navigate through content, documents, assets, colleagues and workgroups quickly and intuitively with enterprise search |
 |
Communicate with friends and colleagues with forums, message boards and corporate blogging using the new Social Networking Platform |
|
Utilize the extensive out-of-the box features or customize your site through Ektron CMS400.NET's open architecture |
 |
Promote collaboration in your organization through project workspaces where others can efficiently find information and work together |
 |
Author/edit content, manage navigation, menus, audit trails, workflow and approvals with the best in breed Content Management |
|
|
|
|
See why there are 20,000+ Ektron integrations worldwide.
|
|
 |
TAKE THE VIDEO TOUR |
 |
or download a FREE TRIAL today. |
|
HOME
Printer friendly page
