Deprecated: mysql_connect():

The MySQL extension:

  • Is not under active development
  • Is officially [deprecated][1] as of PHP 5.5 (released June 2013).
  • Has been removed entirely as of PHP 7.0 (released December 2015)
  • Lacks an OO interface
  • Doesn’t support:
    • Non-blocking, asynchronous queries
    • [Prepared statements][2] or parameterized queries
    • Stored procedures
    • Multiple Statements
    • Transactions
    • The “new” password authentication method (on by default in MySQL 5.6; required in 5.7)
    • All of the functionality in MySQL 5.1

Since it is deprecated, using it makes your code less future proof.