These functions are intended to work with mhash. Mhash can be used to create checksums,
message digests, message authentication codes, and more.
This is an interface to the mhash library. mhash supports a wide
variety of hash algorithms such as MD5, SHA1, GOST, and many
others. For a complete list of supported hashes, refer to the
documentation of mhash. The general rule is that you can access
the hash algorithm from PHP with MHASH_HASHNAME. For example, to
access TIGER you use the PHP constant MHASH_TIGER.
To use it, download the mhash distribution from its web site and follow the included
You need to compile PHP with the
--with-mhash[=DIR] parameter to enable
this extension. DIR is the mhash install directory.
This extension has no configuration directives defined in php.ini.
This extension has no resource types defined.
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
Here is a list of hashes which are currently supported by mhash. If a
hash is not listed here, but is listed by mhash as supported, you can
safely assume that this documentation is outdated.
Example 1. Compute the MD5 digest and hmac and print it out as hex
$input = "what do ya want for nothing?";
$hash = mhash(MHASH_MD5, $input);
echo "The hash is " . bin2hex($hash) . "<br />\n";
$hash = mhash(MHASH_MD5, $input, "Jefe");
echo "The hmac is " . bin2hex($hash) . "<br />\n";
This will produce:
The hash is d03cb659cbf9192dcd066272249f8412
The hmac is 750c783e6ab0b503eaa86e310a5db738