unpack(PHP 4, PHP 5) unpack — Unpack data from binary string Description
array unpack
( string $format
, string $data
)
Unpacks from a binary string into an array according to the given format . 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 /. Return ValuesReturns an associative array containing unpacked elements of binary string. Examples
Example #1 unpack() example
<?phpThe resulting array will contain the entries "chars1", "chars2" and "int". NotesCaution
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. |
