Playsms 1.4.5 and PHP 8.X

Surely, cos I’ve used rector to update the code inside, plus some fixes made by me checking on httpd errors log, but I’ve tested all functions regarding phonebook , users and SMS (with smstools3 and Huawei E220 USB 3g modem) and all worked as expected.
asap I’ll try also the new beta 6! Thanks.

Remember you, I made also italian translation for playsms 1.5.0, if you want, maybe you could add it to this fantastic project!