PHP tutorials , php tutorials for beginners , tutorials for php

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PHP Tutorials
What is PHP
> PHP which stands for Hypertext Preprocessor is a web server-
side scripting language designed for web development.
> It is a general purpose programming language that can be used
for multiple applications such as setting-up security for web
information and manipulation of data within database more
especially MySQL as we will see later in our tutorials and much
more.
> PHP helps in making work easy especially when using the
inbuilt functions and connecting to a database.

Features of PHP
> PHP is the most popular scripting language used for web
development.
> PHP is use to develop static as well as dynamic websites.
> Interesting thing about PHP is it is free , open source (no
need to buy license to create personal as well as commercial
applications) and server-side scripting language(the code is
always executed on the server and generated output is
returned to the end user)
> PHP is faster than other scripting language like ASP and JSP.
> PHP provides two options to write your code I.e. you can
write your HTML code and embed PHP code inside the HTML
code or you can have option to write HTML code inside PHP
code.We will see how to write them in upcoming tutorials.

Environment setup
> In order to create and run PHP programs on your pc
and before uploading them to hosts for worldwide
connection, you need a local server.
> A server will help to enhance communication
between scripts thus enabling your application run
smoothly.
> For this purpose you need a software like Xampp or
other options like Wampp but in this case we are going
to use Xampp.

XAMPP installation
As we already know In order to create and run PHP
programs on your pc and before uploading them to
hosts for worldwide connection, you need a local
server.
Follow the steps given below to install XAMPP on
your local computer.
Locate the downloaded programs i.e. XAMPP setup
file :
> The best directory to get you to your downloaded
program is downloads/programs and look for the
Xampp executable file. Double-click it or :
Running program as an administrator :
> Right click on the icon of the XAMPP program
(executable file) and select the option Run as
administrator from the drop down list. http://www.freeeasytutorials.com/

PHP - Database
> More often we would like to keep information about our users for later reference
with our website, we thus resolve to using databases.
> PHP helps in making work easy especially when using the inbuilt functions and
connecting to a database.
> With PHP, you can connect to database and perform the databases operations like
insert,delete,update and many more.
> MySQL is mainly use for simplicity in storing website data for example user-names
and passwords, it is better to have a database for reference.
> MySQL provides a better interface for which we can manipulate our data.
> Before doing anything with MySql database, ensure you start MySql module in the
Xampp control panel.
> Our next topics will take us through the process of connecting and manipulating
data in our database and the website.

PHP - MYSQL Connect
> This part is very important and must be included in every file
where we want to connect to database and retrieve or send data
to a database.
> The better version of doing it is to create a file with the
connection functionality and include or require in this other files.
> The function for creating the connection is;
mysql_connect(server_name, username, password) ;
> By default, the php admin provides that the username to be root
and password is null i.e ‘ ’.
> To start the PHP admin for database, click the admin button for
MySql module in the xampp control panel.

PHP - MYSQL Update
> Many at a times, users would like to
update their information in your website
such as the username, or email or the
reset a password
> We thus must therefore provide the
with this functionality to change these
things according to user needs.
> To enhance this, we use the UPDATE
query in PHP queries.
> we can specify which data we want to
update the data using the WHERE clause
> For example let’s change the name
Brianfrom previous example to John and
email example@gmail.com to
someone@gmail.com

PHP - MYSQL Select
> The SELECT query allows us to get information from the database.
> We use SELECT query to get all the information or specific
information from the database.
> To get all the information from database we use a *; i.e “SELECT *
FROM table_name”.
> To get information of a specific field we specify it in the query i.e let
us select information from the field username i.e “SELECT username
FROM table_name”.
> This module also allows the selection of data for a specific object
using the WHERE clause.
> Let’s for example write a simple program to display all id, username
and emails from our table

PHP - Sample Application
> We have now come to the end of our tutorials.
> Attached is a a sample application for a voting system in an institution.You
can also use this voting system to do online shopping.
Instruction on installing the online voting system
1.Download the folder Dekut here.
2.Save the folder in htdocs as we do always in xampp folder in c disk.
3.Start both apache an mysql in xampp control panel.
4.Click admin for the mysQl option in xamp control pannel.

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