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PHP Quiz PHP CertificatePHP mysql_connect() Function
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:
|
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);
?>
$con = mysql_connect("localhost","mysql_user","mysql_pwd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
// some code
mysql_close($con);
?>
Complete PHP MySQL Reference
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