What is the difference between crc32 and crc32b?

Question

Apparently the PHP function hash() can be called with the algorithms crc32 and crc32b? What is the difference between them?

Answer 1

The difference between crc32 and crc32b is explained on mhash man page. crc32 is the one used on ethernet, while crc32b is the one used on zip, png... They differ on the table used.

quote taken from php.net