php Mysql

Khóa học miễn phí PHP & MySQL – Database Info nhận dự án làm có lương

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PHP & MySQL – Database Info Example

There are a few important commands in MySQL which can be executed either at the MySQL prompt or by using any script like PHP to get various important information about the database server.

Sr.No. Command & Description
1

SELECT VERSION( )

Server version string
2

SELECT DATABASE( )

Current database name (empty if none)
3

SELECT USER( )

Current username
4

SHOW STATUS

Server status indicators
5

SHOW VARIABLES

Server configuration variables

Example

Try the following example to get database info −

Copy and paste the following example as mysql_example.php −

<html>
   <head>
      <title>Getting MySQL Database Info</title>
   </head>
   <body>
      <?php
         $dbhost = ''localhost
         $dbuser = ''root
         $dbpass = ''root@123
         $dbname = ''TUTORIALS
         $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $dbname);
         $tutorial_count = null;
		 
         if($mysqli->connect_errno ) {
            printf("Connect failed: %s<br />", $mysqli->connect_error);
            exit();
         }
         printf(''Connected successfully.<br />'');
		 
         if ($result = mysqli_query($mysqli, "SELECT DATABASE()")) {
            $row = mysqli_fetch_row($result);
            printf("Default database is %s<br />", $row[0]);
            mysqli_free_result($result);
         }
         $mysqli->close();
      ?>
   </body>
</html>

Output

Access the mysql_example.php deployed on apache web server and verify the output.

Connected successfully.
Default database is tutorials

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