(PECL xpass >= 1.1.0)
crypt_gensalt — Compile a string for use as the salt argument to crypt
Compile a string for use as the salt argument to crypt().
prefixCRYPT_PREFIX_* constant.
If null, the best available hashing method will be selected.
count0, a low default cost will be selected.
Returns a string with the setting, or null in case of an error.
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)