This section holds the
most general questions about PHP: what it is and what it does.
Ø What
is PHP?
Ø What
does PHP stand for?
Ø What
is the relation between the versions?
Ø Can
I run several versions of PHP at the same time?
Ø What
are the differences between PHP 4 and PHP 5?
Ø I
think I found a bug! Who should I tell?
PHP
is an HTML-embedded scripting language. Much of its syntax is borrowed from C,
Java and Perl with a couple of unique PHP-specific features thrown in. The goal
of the language is to allow web developers to write dynamically generated pages
quickly.
Ø What
does PHP stand for?
PHP
stands for PHP: Hypertext Preprocessor. This confuses many people because the
first word of the acronym is the acronym. This type of acronym is called a
recursive acronym. For more information, the curious can visit » Free On-Line
Dictionary of Computing or the » Wikipedia entry on recursive acronyms.
Ø What
is the relation between the versions?
PHP/FI
2.0 is an early and no longer supported version of PHP. PHP 3 is the successor
to PHP/FI 2.0 and is a lot nicer. PHP 5 is the current generation of PHP, which
uses the » Zend engine 2 which, among other things, offers many additional OOP
features.
Ø Can
I run several versions of PHP at the same time?
Yes.
See the INSTALL file that is included in the PHP source distribution.
While PHP5 was purposely designed to be as compatible as possible with previous
versions, there are some significant changes. Some of these changes include:
Ø A
new OOP model based on the Zend Engine 2.0
Ø A
new extension for improved MySQL support
Ø Built-in
native support for SQLite
Ø A
new error reporting constant, E_STRICT, for run-time code suggestions
Ø A
host of new functions to simplify code authoring (and reduce the need to write
your own functions for many common procedures)
MySQL
MySQL
MySQL pronounced either "My
S-Q-L" or "My Sequel," is an open source relational database
management system. It is based on the structure query language (SQL), which is used for adding, removing, and modifying
information in the database. Standard SQL commands, such as ADD, DROP, INSERT,
and UPDATE can be used with MySQL.
MySQL can be used for a variety of applications,
but is most commonly found on Web servers. A website that uses MySQL may
include Web pages that access information from a database. These pages are
often referred to as "dynamic," meaning the content of each page is
generated from a database as the page loads. Websites that use dynamic Web pages
are often referred to as database-driven websites.
Many
database-driven websites that use MySQL also use a Web scripting language like PHP to access information from the database. MySQL
commands can be incorporated into the PHP code, allowing part or all of a Web
page to be generated from database information. Because both MySQL and PHP are
both open source (meaning they are free to download and use), the PHP/MySQL
combination has become a popular choice for database-driven websites.
To Make your own Classifieds websites in Php with MySQL database Log on to: www.posty.in
To Make your own Classifieds websites in Php with MySQL database Log on to: www.posty.in