MySQL Connect
The free MySQL database is very often used with PHP.
Create a Connection to a MySQL Database
Before you can access data in a database, you must create a connection to the database.
In PHP, this is done with the mysql_connect() function.
Syntax
mysql_connect(servername,username,password);
Parameter
|
Description
|
servername
|
Optional. Specifies the server to connect to. Default value is "localhost:3306"
|
username
|
Optional. Specifies the username to log in with. Default value is the name of the user that owns the server process
|
password
|
Optional. Specifies the password to log in with. Default is ""
|
Example
In the following example we store the connection in a variable ($con) for later use in the script. The "die" part will be executed if the connection fails:
<?php
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
// some code
?>
Closing a Connection
The connection will be closed automatically when the script ends. To close the connection before, use the mysql_close() function:
<?php
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
// some code
mysql_close($con);
?>
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