Calculate the MD5 hash of the string "Hello":
The md5() function calculates the MD5 hash of a string.
The md5() function uses the RSA Data Security, Inc. MD5 Message-Digest Algorithm.
From RFC 1321 - The MD5 Message-Digest Algorithm: "The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA."
To calculate the MD5 hash of a file, use the md5_file() function.
|string||Required. The string to be calculated|
|raw||Optional. Specifies hex or binary output
|Return Value:||Returns the calculated MD5 hash on success, or FALSE on failure|
|Changelog:||The raw parameter became optional in PHP 5.0|
Print the result of md5():
Print the result of md5() and then test it:
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