(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)
string md5 (string str)
string md5
Calculates the MD5 hash of str using the RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. The hash is a 32-character hexadecimal number.
See also: crc32() and md5_file()