note 93085 added to function.pack

Coder's example is basically an explanation of bindec() and decbin(), not pack() and unpack(). Here's some code to convert a string binary expression into its binary-string equivalent and vice versa. (Would be even simpler if pack/unpack offered a 'b' format code....) <?php function bin2bstr($input) // Convert a binary expression (e.g., "100111") into a binary-string { if (!is_string($input)) return null; // Sanity check // Pack into a string return pack('H*', base_convert($input, 2, 16)); } function bstr2bin($input) // Binary representation of a binary-string { if (!is_string($input)) return null; // Sanity check // Unpack as a hexadecimal string $value = unpack('H*', $input); // Output binary representation return base_convert($value[1], 16, 2); } // Returns string(3) "ABC" var_dump(bin2bstr('01000001 01000010 01000011')); // Returns string(24) "010000010100001001000011" var_dump(bstr2bin('ABC')); ?> ---- Server IP: 208.69.120.35 Probable Submitter: 67.237.228.46 ---- Manual Page -- http://www.php.net/manual/en/function.pack.php Edit -- https://master.php.net/note/edit/93085 Del: integrated -- https://master.php.net/note/delete/93085/integrated Del: useless -- https://master.php.net/note/delete/93085/useless Del: bad code -- https://master.php.net/note/delete/93085/bad+code Del: spam -- https://master.php.net/note/delete/93085/spam Del: non-english -- https://master.php.net/note/delete/93085/non-english Del: in docs -- https://master.php.net/note/delete/93085/in+docs Del: other reasons-- https://master.php.net/note/delete/93085 Reject -- https://master.php.net/note/reject/93085 Search -- https://master.php.net/manage/user-notes.php