(PECL xpass >= 1.1.0)
crypt_checksalt — Validate a crypt setting string
Checks the salt string against the system configuration and reports whether the hashing method and parameters it specifies are acceptable. It is intended to be used to determine whether the user's passphrase should be re-hashed using the currently preferred hashing method.
saltSalt string to check.
Returns an int, one of CRYPT_SALT_* constant, see the Xpass constants page.
示例 #1 A crypt_checksalt() example
<?php
// Generate a salt for a legacy method
$salt = crypt_gensalt(CRYPT_PREFIX_STD_DES);
// Check the salt
$test = crypt_checksalt($salt);
var_dump($test === CRYPT_SALT_METHOD_LEGACY);
// Generate a salt for default method
$salt = crypt_gensalt();
// Check the salt
$test = crypt_checksalt($salt);
var_dump($test === CRYPT_SALT_OK);
?>以上示例会输出：
bool(true) bool(true)