php 的Hash算法是比较常用的，现在的MD5有时候不太安全，就得用到Hash_algos()中的其它算法，下面进行了一个性能的比较。

php代码：

define('testtime', 50000);$algos = hash_algos();foreach($algos as $algo) {	$st = microtime();	for($i = 0; $i < testtime; $i++) {		hash($algo, microtime().$i);	}	$et = microtime();	list($ss, $si) = explode(' ', $st);	list($es, $ei) = explode(' ', $et);	$time[$algo] = $ei + $es - $si - $ss;}asort($time, SORT_NUMERIC);echo "";print_r($time);Array(  [crc32b] => 0.14577506593323  [crc32] => 0.14600901216125  [adler32] => 0.14769597711182  [md4] => 0.1584680151825  [md5] => 0.15956400747681  [salsa20] => 0.16176804933166  [salsa10] => 0.16325911569214  [tiger128,3] => 0.16543607070923  [sha1] => 0.16547892630005  [tiger160,3] => 0.16672711079407  [tiger192,3] => 0.16793211837769  [tiger128,4] => 0.16802901655579  [sha224] => 0.16959108877563  [tiger160,4] => 0.1713979150238  [tiger192,4] => 0.1717759589386  [sha256] => 0.17396298696899  [ripemd256] => 0.17431005943298  [ripemd128] => 0.17437094918823  [ripemd320] => 0.17870710316467  [haval160,3] => 0.18147005220032  [haval256,3] => 0.18150104528809  [haval224,3] => 0.18176211320496  [sha512] => 0.18234492471313  [haval192,3] => 0.18296506645203  [ripemd160] => 0.18318411643982  [haval128,3] => 0.18408892243958  [sha384] => 0.18502903718567  [haval128,4] => 0.18848111178589  [haval256,4] => 0.18875202952576  [haval160,4] => 0.1895639828186  [haval224,4] => 0.19041207319641  [haval192,4] => 0.19101205462646  [whirlpool] => 0.19728892146301  [haval256,5] => 0.19996902294922  [haval160,5] => 0.20026498704529  [haval192,5] => 0.20072503967285  [haval128,5] => 0.20132308227539  [haval224,5] => 0.2025869493103  [gost] => 0.24892493852234  [snefru256] => 0.28652299385071  [snefru] => 0.29043891609192  [md2] => 0.6300178873291)

php技术：PHP中对各种加密算法、Hash算法的速度测试对比代码，转载需保留来源！

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