Home - Cryptography, Hashing - md5
md5
(PHP 4, PHP 5)
md5 — Calculate the md5 hash of a string
Description
string md5
( string
$str
[, bool $raw_output = false
] )
Calculates the MD5 hash of str using the
» RSA Data Security, Inc.
MD5 Message-Digest Algorithm, and returns that hash.
More info
Hide info
Parameters
-
str -
The string.
-
raw_output -
If the optional
raw_outputis set toTRUE, then the md5 digest is instead returned in raw binary format with a length of 16.
Return Values
Returns the hash as a 32-character hexadecimal number.
Changelog
| Version | Description |
|---|---|
| 5.0.0 |
The raw_output parameter was added.
|
Examples
Example #1 A md5() example
<?php
$str = 'apple';
if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {
echo "Would you like a green or red apple?";
}
?>
Notes
Note: Secure password hashing
It is not recommended to use this function to secure passwords, due to the fast nature of this hashing algorithm. See here for details.
See Also
- md5_file() - Calculates the md5 hash of a given file
- sha1_file() - Calculate the sha1 hash of a file
- crc32() - Calculates the crc32 polynomial of a string
- sha1() - Calculate the sha1 hash of a string
- hash() - Generate a hash value (message digest)
Comments