crypt_gensalt

(PECL xpass >= 1.1.0)

crypt_gensalt — Compile a string for use as the salt argument to crypt

说明

crypt_gensalt(string $prefix = null, int $count = 0): ?string

Compile a string for use as the salt argument to crypt().

参数

prefix: Hashing method. One of the CRYPT_PREFIX_* constant. If null, the best available hashing method will be selected.
count: Controls the processing cost of the hash; the valid range and exact meaning of count depend on the hashing method, but larger numbers correspond to more costly hashes in terms of CPU time and possibly memory usage. If count is 0, a low default cost will be selected.

返回值

Returns a string with the setting, or null in case of an error.

示例

示例 #1 A crypt_gensalt() example

<?php
// Generate the salt
$salt = crypt_gensalt(CRYPT_PREFIX_BLOWFISH);
// Hash the password
$hash = crypt("secret", $salt);
// Check the hash
$test = hash_equals(crypt("secret", $hash), $hash);
var_dump($salt, $hash, $test);
?>

以上示例会输出：

string(29) "$2y$05$GcPykP.Am8C1.dGamdpwW."
string(60) "$2y$05$GcPykP.Am8C1.dGamdpwW.1RR.7uicWvJPZfJfCEizZHqVWwuaJLm"
bool(true)

参见

crypt_preferred_method() - Get the prefix of the preferred hash method
crypt() - 单向字符串散列
hash_equals() - 可防止时序攻击的字符串比较

发现了问题？

了解如何改进此页面 • 提交拉取请求 • 报告一个错误

＋添加备注

用户贡献的备注

此页面尚无用户贡献的备注。

备份地址：http://www.lvesu.com/blog/php/function.crypt-gensalt.php