Mysql-php the operation of the database, the use of both the process and the object of the word is the same code?

Just combine PHP and MySQL to learn,
In advance, is the process-oriented function the same as the object-oriented function?

For example, the query function can be written as follows:
mysql_query ($sql); Method
$conn->query ($sql)//Object

Again such as the Connect_error function, can be written as follows:
Mysqli_connect_error (); Method
$conn->connect_error//process

I'm not experimenting with anything else.
I would like to ask, is not all functions mysqli_ replaced by the object name---line?

There is the operation of data, where is the habit of using the process when the use of the object?

Reply content:

Just combine PHP and MySQL to learn,
In advance, is the process-oriented function the same as the object-oriented function?

For example, the query function can be written as follows:
mysql_query ($sql); Method
$conn->query ($sql)//Object

Again such as the Connect_error function, can be written as follows:
Mysqli_connect_error (); Method
$conn->connect_error//process

I'm not experimenting with anything else.
I would like to ask, is not all functions mysqli_ replaced by the object name---line?

There is the operation of data, where is the habit of using the process when the use of the object?

PHP Deprecated:mysql_connect (): The MySQL extension is Deprecated and would be a removed in the future:
The procedural wording is only supported by Php_mysql, but the PHP high version has canceled the Php_mysql support.

From the code point of view, they are the same, at the end of the same code to implement database operations, the difference is the design.

