# hash_hmac_algos

(PHP 7 >= 7.2.0)

hash_hmac_algos — Return a list of registered hashing algorithms suitable for hash_hmac

### 说明

hash_hmac_algos ( void ) : array

### 返回值

Returns a numerically indexed array containing the list of supported hashing algorithms suitable for hash_hmac().

### 范例

Example #1 hash_hmac_algos() example

    <?php
    print_r(hash_hmac_algos());

以上例程的输出类似于：

    Array
    (
        [0] => md2
        [1] => md4
        [2] => md5
        [3] => sha1
        [4] => sha224
        [5] => sha256
        [6] => sha384
        [7] => sha512/224
        [8] => sha512/256
        [9] => sha512
        [10] => sha3-224
        [11] => sha3-256
        [12] => sha3-384
        [13] => sha3-512
        [14] => ripemd128
        [15] => ripemd160
        [16] => ripemd256
        [17] => ripemd320
        [18] => whirlpool
        [19] => tiger128,3
        [20] => tiger160,3
        [21] => tiger192,3
        [22] => tiger128,4
        [23] => tiger160,4
        [24] => tiger192,4
        [25] => snefru
        [26] => snefru256
        [27] => gost
        [28] => gost-crypto
        [29] => haval128,3
        [30] => haval160,3
        [31] => haval192,3
        [32] => haval224,3
        [33] => haval256,3
        [34] => haval128,4
        [35] => haval160,4
        [36] => haval192,4
        [37] => haval224,4
        [38] => haval256,4
        [39] => haval128,5
        [40] => haval160,5
        [41] => haval192,5
        [42] => haval224,5
        [43] => haval256,5
    )

### 注释

> Note:

> Before PHP 7.2.0 the only means to get a list of supported hash algorithms has been to call hash_algos() which also returns hash algorithms that are not suitable for hash_hmac().

### 参见

- hash_hmac() - 使用 HMAC 方法生成带有密钥的哈希值
- hash_algos() - 返回已注册的哈希算法列表