Configuring PHP for MySQL Server Access

MySQL Tutorials - Herong's Tutorial Examples

∟Configuring PHP for MySQL Server Access

A tutorial example is provided on how to configure the PHP engine for MySQL server connection access. Setting, extension=php_mysql.dll, needs to be turned on in the configuration file php.ini.

To use PHP programs to access MySQL servers, of course you need to install the PHP engine on you computer first. If you need help on installing the PHP engine, please read my other tutorial book, "PHP Tutorials - Herong's Tutorial Examples" at herongyang.com/PHP.

Then you need to turn on the php_mysqli extension by editing \local\php\php.ini with:

extension=php_mysqli.dll

You may also need to add \local\php\ext to the PATH system environment variable, because php_mysqli.dll is located in the \local\php\ext directory.

When I was ready to test the configuration, I ran this script:

<?php
#- MySqlTest.php
#  Copyright (c) 2005 HerongYang.com. All Rights Reserved.
#
   $con = mysqli_connect('localhost','root','TopSecret');
   print "MySQL server info = ".mysqli_get_server_info($con)."\n";
   print "MySQL status = ".mysqli_stat($con)."\n";
   mysqli_close($con);
?>

I got this this error with MySQL Server 8.0:

herong> \local\php\php -version
PHP 7.3.0 (cli) (built: Dec  6 2018 01:54:19) (...)
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.0-dev, Copyright (c) 1998-2018 Zend Technologies

herong> \local\php\php MySqlTest.php
PHP Warning:  mysqli_connect(): The server requested authentication
method unknown to the client [caching_sha2_password]
in C:\herong\MySqlTest.php on line 5
...

This error is caused by the new authentication method, caching_sha2_password, used by MySQL Server 8.0. See next tutorial on how to resolve this error.

Note that I had no problem running the same PHP script on MySQL Server 5.7:

herong> \local\php\php -version
PHP 5.6.6 (cli) (built: Feb 18 2015 16:02:19)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies

herong> \local\php\php MySqlTest.php
MySQL server info = 5.7.10-log
MySQL status = Uptime: 46148  Threads: 1  Questions: 155
   Slow queries: 0  Opens: 128  Flush tables: 1
   Open tables: 117  Queries per second avg: 0.003