(PHP 5 >= 5.3.0)
openssl_digest — Computes a digest
$data
, string $method
[, bool $raw_output = false
] )Computes a digest hash value for the given data using a given method, and returns a raw or binhex encoded string.
本函数还未编写文档，仅有参数列表。
data
The data.
method
The digest method.
raw_output
Setting to TRUE will return as raw output data, otherwise the return
value is binhex encoded.
Returns the digested hash value on success 或者在失败时返回 FALSE.
Emits an E_WARNING level error if an unknown signature algorithm
is passed via the method parameter.
skyblackhawk at yahoo dot it (2011-06-10 08:34:26)
Example:
// $fileBuffer is buffer of file in open mode or a generic stream...
$fingerPrint = openssl_digest ($fileBuffer , "sha512");
$method parameter is one of hash_algos() array;
<? echo"<PRE>";
var_dump(hash_algos());
echo "</PRE>"
?>
Output:
array(42) {
[0]=>
string(3) "md2"
[1]=>
string(3) "md4"
[2]=>
string(3) "md5"
[3]=>
string(4) "sha1"
[4]=>
string(6) "sha224"
[5]=>
string(6) "sha256"
[6]=>
string(6) "sha384"
[7]=>
string(6) "sha512"
[8]=>
string(9) "ripemd128"
[9]=>
string(9) "ripemd160"
[10]=>
string(9) "ripemd256"
[11]=>
string(9) "ripemd320"
[12]=>
string(9) "whirlpool"
[13]=>
string(10) "tiger128,3"
[14]=>
string(10) "tiger160,3"
[15]=>
string(10) "tiger192,3"
[16]=>
string(10) "tiger128,4"
[17]=>
string(10) "tiger160,4"
[18]=>
string(10) "tiger192,4"
[19]=>
string(6) "snefru"
[20]=>
string(9) "snefru256"
[21]=>
string(4) "gost"
[22]=>
string(7) "adler32"
[23]=>
string(5) "crc32"
[24]=>
string(6) "crc32b"
[25]=>
string(7) "salsa10"
[26]=>
string(7) "salsa20"
[27]=>
string(10) "haval128,3"
[28]=>
string(10) "haval160,3"
[29]=>
string(10) "haval192,3"
[30]=>
string(10) "haval224,3"
[31]=>
string(10) "haval256,3"
[32]=>
string(10) "haval128,4"
[33]=>
string(10) "haval160,4"
[34]=>
string(10) "haval192,4"
[35]=>
string(10) "haval224,4"
[36]=>
string(10) "haval256,4"
[37]=>
string(10) "haval128,5"
[38]=>
string(10) "haval160,5"
[39]=>
string(10) "haval192,5"
[40]=>
string(10) "haval224,5"
[41]=>
string(10) "haval256,5"
}