(PHP 4, PHP 5, PHP 7)
Calculate the md5 hash of a string
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.
Parameters:
str
The string.
raw_output
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.
Returns:
Returns the hash as a 32-character hexadecimal number.
Notes:
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.
Examples:
A md5() example
<?php $str = 'apple'; if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') { echo "Would you like a green or red apple?"; } ?>
See also:
crc32() -
sha1() -
hash() -
crypt() -
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