md5加密 * * * * * ~~~ encrypt_md5($password,salt) ~~~ ~~~ /** * md5加密 * @param $password * @param string $salt = null * @return string */ ~~~ * * * * * 例： ~~~ echo encrypt_md5(123456,0000); ~~~ => `d58deabcc7b55d47b06ebe40862b55dc `