Computer >> Computer tutorials >  >> Programming >> MySQL

Which PHP function is used to establish MySQL database connection using PHP script?

PHP provides mysql_connect() function to open a database connection. This function takes five parameters and returns a MySQL link identifier on success or FALSE on failure. Its syntax is as follows −

Syntax

connection mysql_connect(server,user,passwd,new_link,client_flag);

Following table give us the parameters used in the syntax above −

Sr.No
Parameter & Description
1
Server
Optional − The host name running the database server. If not specified, then the default value will be localhost:3306
2
User
Optional − The username accessing the database. If not specified, then the default will be the name of the user that owns the server process
3
Passwd
Optional − The password of the user accessing the database. If not specified, then the default will be an empty password
4
new_link
Optional − If a second call is made to mysql_connect() with the same arguments, no new connection will be established; instead, the identifier of the already opened connection will be returned
5
client_flags
Optional − A combination of the following constants −
  1. MYSQL_CLIENT_SSL − Use SSL encryption.
  2. MYSQL_CLIENT_COMPRESS − Use compression protocol.
  3. MYSQL_CLIENT_IGNORE_SPACE − Allow space after function names.
  4. MYSQL_CLIENT_INTERACTIVE − Allow interactive timeout seconds of inactivity before closing the connection.