Tutorial on selecting database files using mysql_select_db() function

In PHP, after establishing a connection with the MySQL server, we need to determine the database to be connected. At this time, we can use the mysql_select_db function. This function is used to select the database that needs to be operated. Friends in need can refer to Next

mysql_select_db introduction

mysql_select_db function has two parameters:

mysql_select_db(database,connection)

If successful, the function returns true. If failed, returns false.

Parameters	Description
database	Required. A database needs to be selected.
connection	Optional. MySQL connection. If this parameter is not set, it indicates that the previous mysql database connection is used.

mysql_select_db instance

<?php
 $host="mysql153.secureserver.net";
 $uname="root";
 $pass="password";
 
 $connection= mysql_connect ($host, $uname, $pass);
 
 if (!$connection) {
   die ("mysql连接失败"); 
 }
 
 $result=mysql_select_db ("manongjc");
 
 if (! $result) {
   die ("没有选择任何数据库");
 }
   
 echo "数据库manongjc已经选择，可以使用该数据库了";
?>

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