   #PHP Manual Miscellaneous functions uniqid usleep

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                                    unpack

   (PHP 3, PHP 4 )
   unpack -- Unpack data from binary string

Description

   array unpack ( string format, string data)

   unpack() from binary string into array according to format. Returns
   array containing unpacked elements of binary string.

   unpack() works slightly different from Perl as the unpacked data is
   stored in an associative array. To accomplish this you have to name
   the different format codes and separate them by a slash /.

   Example 1. unpack() example
   <?php
   $array = unpack("c2chars/nint", $binarydata);
   ?>

   The resulting array will contain the entries "chars1", "chars2" and
   "int".

   Caution

   Note that PHP internally stores integral values as signed. If you
   unpack a large unsigned long and it is of the same size as PHP
   internally stored values the result will be a negative number even
   though unsigned unpacking was specified.

   See also pack() for an explanation of the format codes.
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