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PHP mysql_connect() Function


PHP MySQL Reference Complete PHP MySQL Reference

Definition and Usage

The mysql_connect() function opens a non-persistent MySQL connection.

This function returns the connection on success, or FALSE and an error on failure. You can hide the error output by adding an '@' in front of the function name.

Syntax

mysql_connect(server,user,pwd,newlink,clientflag)

Parameter Description
server Optional. Specifies the server to connect to (can also include a port number. e.g. "hostname:port" or a path to a local socket for the localhost). Default value is "localhost:3306"
user Optional. Specifies the username to log in with. Default value is the name of the user that owns the server process
pwd Optional. Specifies the password to log in with. Default is ""
newlink 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
clientflag Optional. Can be a combination of the following constants:
  • MYSQL_CLIENT_SSL - Use SSL encryption
  • MYSQL_CLIENT_COMPRESS - Use compression protocol
  • MYSQL_CLIENT_IGNORE_SPACE - Allow space after function names
  • MYSQL_CLIENT_INTERACTIVE - Allow interactive timeout seconds of inactivity before closing the connection


Tips and Notes

Tip: The connection will be closed as soon as the script ends. To close the connection before, use mysql_close().

Tip: To establish a persistent MySQL connection, use mysql_pconnect() instead.


Example

<?php
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

// some code

mysql_close($con);
?>


PHP MySQL Reference Complete PHP MySQL Reference

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