PHP is a server-side, HTML-embedded scripting language that may be used to create dynamic Web pages. It is available for most operating systems and Web servers, and can access most common databases, including MySQL. PHP may be run as a separate program or compiled as a module for use with a Web server.
PHP provides three different MySQL API extensions:
Chapter 4, MySQL Improved Extension (
Mysqli): Stands for “MySQL,
Improved”; this extension is available as of PHP 5.0.0.
It is intended for use with MySQL 4.1.1 and later. This
extension fully supports the authentication protocol used in
MySQL 5.0, as well as the Prepared Statements and Multiple
Statements APIs. In addition, this extension provides an
advanced, object-oriented programming interface.
Chapter 5, MySQL Functions (PDO_MYSQL) (
MySQL (PDO)): Not its own API, but
instead it's a MySQL driver for the PHP database abstraction
layer PDO (PHP Data Objects). The PDO MySQL driver sits in the
layer below PDO itself, and provides MySQL-specific
functionality. This extension is available as of PHP 5.1.0.
Chapter 3, Original MySQL API (
Mysql): Available for PHP versions 4
and 5, this extension is intended for use with MySQL versions
prior to MySQL 4.1. This extension does not support the
improved authentication protocol used in MySQL 4.1, nor does
it support prepared statements or multiple statements. To use
this extension with MySQL 4.1, you will likely configure the
MySQL server to set the
old_passwords system variable
to 1 (see
Client does not support authentication protocol).
This extension was removed from PHP 5.5.0. All users must
migrate to either
PDO_MySQL. For further information, see
Section 2.3, “Choosing an API”.
The PHP distribution and documentation are available from the PHP Web site.
Portions of this section are Copyright (c) 1997-2012 the PHP Documentation Group This material may be distributed only subject to the terms and conditions set forth in the Creative Commons Attribution 3.0 License or later. A copy of the Creative Commons Attribution 3.0 license is distributed with this manual. The latest version is presently available at http://creativecommons.org/licenses/by/3.0/.
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