PHP マニュアル: Validate a crypt setting string

説明

stringnull crypt_checksalt(string $salt)

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.

パラメータ

salt: Salt string to check.

戻り値

Returns one of the CRYPT_SALT_* as an int.

例

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);
?>

上の例の出力は以下となります。

bool(true)
bool(true)

参考

crypt_gensalt