Drupal user_hash_password 函数每次计算哈希时都会生成一个新的盐.这将导致生成新的哈希，因为盐可能与上一个不同.

The Drupal user_hash_password function generates a new salt each time it calculates the hash. This will cause a new hash to be generated since the salt is likely to be different to the last one.