perl pack() equivalent for php with 'B'

I am porting some perl code to php. I came accross the perl pack() that has a 'B' format code that is missing in PHP pack(). Is there an equivalent function that i can use or can anyone tell me how i can write an equivalent to it? I came accross this at the following link: http://fooassociates.com/phpfer/html/rn45re877.html "'B' = Bit string, high-to-low order (See PHP's decbin() function. This is also roughly similar to the Perl vec() function, which has no cognate in PHP." That din't make sense to me. Can anybody please help me? FOSSY ________________________________________________________________________ Missed your favourite TV serial last night? Try the new, Yahoo! TV. visit http://in.tv.yahoo.com