md5

Description

string md5 ( string str [, bool raw_output] )

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. If the optional raw_output is set to TRUE, then the md5 digest is instead returned in raw binary format with a length of 16.

例子 1. A md5() example <?php $str = 'apple'; if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {     echo "Would you like a green or red apple?";     exit; } ?>

See also crc32(), md5_file(), and sha1().