Support

Home Products Downloads News Store Support

Stan's Blog

MLM mySQL to mySQLi migration

How to use Maxprog products Maxprog's Blog

Compatible with MS Windows Compatible with MacOS


MLM mySQL to mySQLi migration

Topics
MLM has been fully updated to use mySQLi calls rather than mySQL.

That was done during summer 2016 and fully tested during 12 months for problems. None were found so the procedure below is quite secure. If you read this and you are about to update your PHP file to use mySQLi calls the best is to prepare you work thoroughly in advance. Check which functions are used and what is the mySQLi equivalent, the name use to be the same but with a mysqli_ prefix instead of mysql_ however most function calls require more parameters to be passed and they can be in reverse order.

List of MySQL functions to update (in lm_functions.php):

> mysql_get_host_info()
--> mysqli_get_host_info ( $mysql_link )

> mysql_get_server_info()
--> mysqli_get_server_info ( $mysql_link )

> mysql_get_client_info()
--> mysqli_get_client_info ( $mysql_link )

> mysql_get_proto_info()
--> mysqli_get_proto_info ( $mysql_link )

> mysql_real_escape_string( $text )
--> mysqli_real_escape_string ( $mysql_link , $text )

> mysql_affected_rows( $mysql_link )
--> mysqli_affected_rows ( $mysql_link )

> mysql_client_encoding( $mysql_link )
--> mysqli_character_set_name ( $mysql_link )

> mysql_close( $mysql_link )
--> mysqli_close($mysql_link)

> mysql_connect( $dbhost, $dbusername, $dbuserpass, $dbname )
--> mysqli_connect( $dbhost, $dbusername, $dbuserpass, $dbname )

> mysql_db_query( $dbname, $query )
--> mysqli_query( $mysql_link, $query )

> mysql_errno( $mysql_link )
--> mysqli_errno( $mysql_link )

> mysql_error( $mysql_link )
--> mysqli_error( $mysql_link )

> mysql_fetch_array( $res )
--> mysqli_fetch_array( $res )

> mysql_num_rows( $res )
--> mysqli_num_rows( $res )

> mysql_query( $query, $mysql_link )
--> mysqli_query( $mysql_link, $query ) <- INVERTED PARAMETERS!!

> mysql_select_db ( $dbname )
--> NOT REQUIRED, SEE NOTE 3

> mysql_set_charset( "utf8", $mysql_link )
--> mysqli_set_charset( $mysql_link, "utf8" ) <- INVERTED PARAMETERS!!

> mysql_fetch_object( $res )
--> mysqli_fetch_object ( $res )

Server connection error has changed:

> mysql_errno( $mysql_link )
--> mysqli_connect_errno()

> mysql_error( $mysql_link )
--> mysqli_connect_error()

NOTE 1: $mysql_link has to be global and available to each function that needs it with the 'global' keyword.

NOTE 2: After a given query has been processed and we are done with the result just call the mysqli_free_result($result) function.

NOTE 3: mysqli_connect already select the database so mysqli_select_db ( $mysql_link , $dbname ) is just for changing DB.

After the changes we should not find any 'mysql_' strings in the code at all.

For your info, the mysqli extension has a number of benefits, the key enhancements over the mysql extension being:

- Object-oriented interface
- Support for Prepared Statements
- Support for Multiple Statements
- Support for Transactions
- Enhanced debugging capabilities
- Embedded server support

Manual | Migration guide | Guide + tool | More info


Stan Busk - Software Engineer
at www.maxprog.com










Recent questions from our users
  How to transfer FTP accounts between computers NEW Screenshot
  Google ending support for less secure apps UPDATED YouTube Video
  How to add social networks icons to my message UPDATED Screenshot
  How do I set up an unsubscribe link UPDATED Screenshot
  How to export several lists into to a single file Screenshot
  Why do I get timeouts when testing given addresses Screenshot
  What are the Zoho mail settings for MaxBulk Mailer? Screenshot
  iCash has become slow over time Screenshot
  Emails sent but not received Screenshot
  HTML Email is received empty Screenshot
  How to use an alternative text when a tag value is empty Screenshot
  Email Bounce Handler no longer works with Gmail Screenshot
  Is Maxprog software ready for the Apple ARM processor? Screenshot
  Is Maxprog software prepared for Windows 11? Screenshot
  Is Maxprog software prepared for macOS 12 Monterey? Screenshot

▾ Last videos, Online events and Q&A Sessions ▾

▾ Last customer reviews ▾


Did you like this post?


🔐 Secured by Comodo SSL | UptimeRobot - Site Loaded properly