Why shouldn't I use mysql_* functions in PHP?

Question

What are the technical reasons for why one shouldn't use `mysql_*` functions? (e.g. `mysql_query()`, `mysql_connect()` or `mysql_real_escape_string()`)? Why should I use something else even if they work on my site? If they don't work on my site, why do I get errors like > Warning: mysql_connect(): No such file or directory

Answer 1

It is advisable to upgrade your php code version to 7 for security purposes and access to additional keywords, functions to make your program efficient and increase your program load performance. Avoid using mysql, you should use PDO or MySQLi. I will strongly recommend PDO. It may feel stressful for code refactoring, but it worth all the effort and time.