PHP
is a authoritative scripting verbal that fits elegantly into HTML and puts the tools for creating active
websites in the hands of the people — even people like me who were too lazy to
learn Perl scripting and other difficult backed hoodoo. This tutorial is for
the person who understands HTML
but doesn’t know much about PHP.
One of PHP’s
greatest attributes is that it’s a freely distributed open-source language, so
there are all kinds of excellent orientation material about it out there, which
means that once you understand the basics, it’s easy to find the materials that
you need to push your skills. PHP
is a program that gets installed on top of your web server software. It works
with versions of Apache Microsoft IIS and other server software packages. You
use PHP by
inserting PHP
code inside the HTML
that makes up your website. When a client (anybody on the web) visits a web
page that contains this code, your server executes it. That’s why you need to
mount your own server in order to test PHP locally — the server is the brain
here, not your browser. Users don’t need any special plug-ins or anything to
see your PHP in
action — it gets to the end user as regular old-fashioned HTML. PHP is a scripting
language, like HTML.
That means that code does not need to be compiled before it gets used — it gets
administered on the fly as required. . PHP is an open-source language, and PHP.net is its control center, with extensive
reference material about the language and tips sent in by users across the
globe. PHP.net
has exceptional, deep information about the language, but it can be a little
cryptic for the newcomer. We’ll look more closely at how to use PHP.net at the
end of this tutorial. What kinds of things can PHP do? Well … it can: take info from
web-based forms and use it in a million ways (store it in a folder, create
conditional pages liable on what the forms said, set cookies for later, send
e-mail, write your mom on her birthday); authenticate and track users; run
threaded deliberations on your site; serve different pages to people using
different browsers or devices; publish an entire website using just a single
layout template (server-side includes-style); serve XML pages. But before we can
get to the specific uses of PHP, we need to start with a quick preview of the building
blocks of PHP, beginning with a sample script. This example script is titled
“chicken man.php.” When called by a web browser, it would simply read, “I am
the CHICKEN MAN!”
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