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.
注:
The optional raw_output parameter was added in
PHP 5.0.0 and defaults to FALSE
例子 1. A md5() example |
<?php
$str = 'apple';
if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {
echo "Would you like a green or red apple?";
exit;
}
?>
|
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See also crc32(), md5_file(),
and sha1().
md5_file
