PHP mysql_select_db() Function Example

The mysql_select_db() function is used to select current running database for the application. This function return True for success or false for failure.

PHP mysql_select_db() Function Example:

The mysql_select_db() function is used to select current running database for the application. This function return True for success or false for failure.

Example:

<?php
$connection = mysql_connect("localhost","root","root");

if (!$connection) {
die('PHP Mysql database connection could not connect : ' . mysql_error());
}
else{ 
$db_name = "php_mysql";

mysql_select_db($db_name, $connection);
$sql = "select * from user;";
$records = mysql_query($sql, $connection); 
while($rows = mysql_fetch_array($records)){
echo "User Id : " . $rows['user_id'] . "<br />";
echo "User Name : " . $rows['user_name'] . "<br />";
echo "User Email : " . $rows['user_email'] . "<br />";
echo "User Address : " . $rows['user_address'] . "<br /><br /><br />";
}
}
mysql_close($connection); 
?> 

In this example we have used mysql_select_db() function and select "php_mysql" database for perform mysql operation on it.

The "php_mysql" database on the mysql server have 'user' table and the records in the 'user' table is:

After running example the browser output is:

Output:

User Id : 3
User Name : Deepak
User Email : deepak@rediffmail.com
User Address : Noida


User Id : 4
User Name : Dipali
User Email : dipali@hotmail.com
User Address : Guraun

Download Example Code