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Updating mysqli: bring overview up to date

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Patch contributed by Dharman <tekiela246@gmail.com>.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@351329 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Christoph Michael Becker 2020-11-08 12:25:50 +00:00
parent 63319dea7d
commit 14ba1dcb17
1 changed files with 17 additions and 93 deletions
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110
reference/mysqli/overview.xml
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@ -23,11 +23,11 @@
</para>
<para>
APIs can be procedural or object-oriented. With a procedural API you
APIs can be procedural or object-oriented. With a procedural API, you
call functions to carry out tasks, with the object-oriented API you
instantiate classes and then call methods on the resulting objects.
Of the two the latter is usually the preferred interface, as it is
more modern and leads to better organized code.
Of the two, the latter is usually the preferred interface, as it is
more modern and leads to better-organized code.
</para>
<para>
@ -51,7 +51,7 @@
<para>
If your PHP application needs to communicate with a database server
you will need to write PHP code to perform such activities as
connecting to the database server, querying the database and other
connecting to the database server, querying the database, and other
database-related functions. Software is required to provide the API
that your PHP application will use, and also handle the
communication between your application and the database server,
@ -95,8 +95,8 @@
In the PHP documentation you will come across another term -
<emphasis>extension</emphasis>. The PHP code consists of a core,
with optional extensions to the core functionality. PHP's
MySQL-related extensions, such as the <literal>mysqli</literal>
extension, and the <literal>mysql</literal> extension, are
MySQL-related extensions, such as the mysqli
extension, and the PDO MySQL driver extension, are
implemented using the PHP extension framework.
</para>
@ -125,18 +125,12 @@
</para>
<para>
There are three main API options when considering connecting to a
There are two main API options when considering connecting to a
MySQL database server:
</para>
<itemizedlist>
<listitem>
<para>
PHP's MySQL Extension
</para>
</listitem>
<listitem>
<para>
PHP's mysqli Extension
@ -157,37 +151,6 @@
each API.
</para>
<para>
<emphasis role="bold">What is PHP's MySQL Extension?</emphasis>
</para>
<para>
This is the original extension designed to allow you to develop PHP
applications that interact with a MySQL database. The
<literal>mysql</literal> extension provides a procedural interface
and is intended for use only with MySQL versions older than 4.1.3.
This extension can be used with versions of MySQL 4.1.3 or newer,
but not all of the latest MySQL server features will be available.
</para>
<note>
<para>
If you are using MySQL versions 4.1.3 or later it is
<emphasis>strongly</emphasis> recommended that you use the
<literal>mysqli</literal> extension instead.
</para>
</note>
<para>
The <literal>mysql</literal> extension source code is located in the
PHP extension directory <filename>ext/mysql</filename>.
</para>
<para>
For further information on the <literal>mysql</literal> extension,
see <xref linkend="book.mysql"/>.
</para>
<para>
<emphasis role="bold">What is PHP's mysqli Extension?</emphasis>
</para>
@ -240,14 +203,6 @@
</itemizedlist>
</para>
<note>
<para>
If you are using MySQL versions 4.1.3 or later it is
<emphasis>strongly</emphasis> recommended that you use this
extension.
</para>
</note>
<para>
As well as the object-oriented interface the extension also provides
a procedural interface.
@ -307,7 +262,7 @@
<para>
The PDO MYSQL driver is not an API as such, at least from the PHP
programmer's perspective. In fact the PDO MYSQL driver sits in the
programmer's perspective. In fact, the PDO MYSQL driver sits in the
layer below PDO itself and provides MySQL-specific functionality.
The programmer still calls the PDO API, but PDO uses the PDO MYSQL
driver to carry out communication with the MySQL server.
@ -336,8 +291,7 @@
</para>
<para>
In order to communicate with the MySQL database server the
<literal>mysql</literal> extension, <literal>mysqli</literal> and
In order to communicate with the MySQL database server, <literal>mysqli</literal> and
the PDO MYSQL driver each use a low-level library that implements
the required protocol. In the past, the only available library was
the MySQL Client Library, otherwise known as
@ -348,14 +302,13 @@
However, the interface presented by <literal>libmysqlclient</literal> was
not optimized for communication with PHP applications, as
<literal>libmysqlclient</literal> was originally designed with C
applications in mind. For this reason the MySQL Native Driver,
applications in mind. For this reason, the MySQL Native Driver,
<literal>mysqlnd</literal>, was developed as an alternative to
<literal>libmysqlclient</literal> for PHP applications.
</para>
<para>
The <literal>mysql</literal> extension, the
<literal>mysqli</literal> extension and the PDO MySQL driver can
Both, the <literal>mysqli</literal> extension and the PDO MySQL driver can
each be individually configured to use either
<literal>libmysqlclient</literal> or <literal>mysqlnd</literal>. As
<literal>mysqlnd</literal> is designed specifically to be utilised
@ -364,13 +317,6 @@
advantage of these improvements.
</para>
<note>
<para>
The MySQL Native Driver can only be used with MySQL server
versions 4.1.3 and later.
</para>
</note>
<para>
The MySQL Native Driver is implemented using the PHP extension
framework. The source code is located in
@ -390,23 +336,21 @@
</para>
<para>
The following table compares the functionality of the three main
The following table compares the functionality of the main
methods of connecting to MySQL from PHP:
</para>
<table>
<title>Comparison of MySQL API options for PHP</title>
<tgroup cols="4">
<colspec colwidth="25*"/>
<colspec colwidth="25*"/>
<colspec colwidth="25*"/>
<colspec colwidth="25*"/>
<tgroup cols="3">
<colspec colwidth="34*"/>
<colspec colwidth="33*"/>
<colspec colwidth="33*"/>
<thead>
<row>
<entry></entry>
<entry>PHP's mysqli Extension</entry>
<entry>PDO (Using PDO MySQL Driver and MySQL Native Driver)</entry>
<entry>PHP's MySQL Extension</entry>
</row>
</thead>
<tbody>
@ -414,61 +358,41 @@
<entry>PHP version introduced</entry>
<entry>5.0</entry>
<entry>5.0</entry>
<entry>Prior to 3.0</entry>
</row>
<row>
<entry>Included with PHP 5.x</entry>
<entry>yes</entry>
<entry>yes</entry>
<entry>Yes</entry>
</row>
<row>
<entry>MySQL development status</entry>
<entry>Active development</entry>
<entry>Active development as of PHP 5.3</entry>
<entry>Maintenance only</entry>
</row>
<row>
<entry>Recommended by MySQL for new projects</entry>
<entry>Yes - preferred option</entry>
<entry>Yes</entry>
<entry>No</entry>
<entry>Active development</entry>
</row>
<row>
<entry>API supports Charsets</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>API supports server-side Prepared Statements</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>API supports client-side Prepared Statements</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>API supports Stored Procedures</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>API supports Multiple Statements</entry>
<entry>Yes</entry>
<entry>Most</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports all MySQL 4.1+ functionality</entry>
<entry>Yes</entry>
<entry>Most</entry>
<entry>No</entry>
</row>
</tbody>
</tgroup>