note 31532 added to function.unpack
| From: | David at rack1 dot php dot net | Date: | Fri, 25 Apr 2003 07:04:01 +0000 |
| Subject: | note 31532 added to function.unpack | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-47062@lists.php.net to get a copy of this message | ||
This is the best example I have found to use unpack. I was finally able to make sense of the
documentation afters seeing how they used the function.
http://fooassociates.com/phpfer/html/rn45re878.html
Quick Example:
<?
header("Content-type: text/plain");
/*
N unsigned long (always 32 bit, big endian byte order)
N = 4 bytes
"N2int_var" will read 8 bytes into 2 vars int_var1 and int_var2
binary string A324 = decimal 1,093,874,228
binary string &*12 = decimal 640,299,314
C unsigned char
"Cchar_var" will read 1 byte into char_var
binary string J = decimal 74
*/
$assoc_array = unpack("N2int_var/Cchar_var", "A324&*12J");
echo "int_var1 = ", $assoc_array['int_var1'], "\n";
echo "int_var2 = ", $assoc_array['int_var2'], "\n";
echo "char_var = ", $assoc_array['char_var'], "\n";
?>
Sample Output:
int_var1 = 1093874228
int_var2 = 640299314
char_var = 74
--
http://www.php.net/manual/en/function.unpack.php
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