語法：

array hash_algos( void )

參數：該函數不接受任何參數。

返回值：此函數返回一個數字索引數組，其中包含支持的散列算法列表。

下面的程序演示了PHP中的hash_algos()函數：

程序：

<?php   // hash_algos() 函數print_r(hash_algos()); ?>

輸出：

Array(    [0] => md2    [1] => md4    [2] => md5    [3] => sha1    [4] => sha224    [5] => sha256    [6] => sha384    [7] => sha512    [8] => ripemd128    [9] => ripemd160    [10] => ripemd256    [11] => ripemd320    [12] => whirlpool    [13] => tiger128,3    [14] => tiger160,3    [15] => tiger192,3    [16] => tiger128,4    [17] => tiger160,4    [18] => tiger192,4    [19] => snefru    [20] => snefru256    [21] => gost    [22] => gost-crypto    [23] => adler32    [24] => crc32    [25] => crc32b    [26] => fnv132    [27] => fnv1a32    [28] => fnv164    [29] => fnv1a64    [30] => joaat    [31] => haval128,3    [32] => haval160,3    [33] => haval192,3    [34] => haval224,3    [35] => haval256,3    [36] => haval128,4    [37] => haval160,4    [38] => haval192,4    [39] => haval224,4    [40] => haval256,4    [41] => haval128,5    [42] => haval160,5    [43] => haval192,5    [44] => haval224,5    [45] => haval256,5)

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