i scripted my web page using OOP, works fine to my localhost and when i try to upload it into my host it shows this errors. the host is using version 4 for php.. and there an option whether to enable php 5 or not... this is my question.. will there be some script from php 4 that will be unreadable for php 5 (there is an existing assessment exam in my host version php4).????? im thinking it might cause some errors when upgrading...
I highly recommend upgrading your host to PHP 5. (PHP 4 is officially unsupported now). Most scripts written for PHP 4 will still work in PHP 5. There might be some exceptions, but you shouldn't face any major problems. And if you do, they probably can be fixed easily.