php, mysq lpart1

SUBHASIS NAYAK

CMC

PHP, MYSQL

What we will discuss ?

Here we will discuss what PHP is all about?

PHP MySql Apache installationPHP basics.

Variables & data typesFlow controlsFunctions

What php is all about?

PHP is hugely popular, and mostly used programming language for website’s backend process.

IT is a programming language that was designed for making dynamic websites.

he name PHP is a recursive acronym that stands for PHP: Hypertext Preprocessor.

Hi! I am not with time to describe more about PHP. So go the site http://php.net and check it out.

Continue …..

The PHP language is flexible and easy to learn quickly even if you have not done any programming in the past.

If you have done any programming language like c, c++, java then you can learn PHP in one night.

Installing AMP

It has three steps Installing Apache – it is very simple step by step. Installing php –

extract your php compressed package. Set the environment path. To ‘conf ‘ folder of apache=>open httpd.conf and enable all

belows LoadModule php5_module “///” AddType application/x-httpd-php.php AddTypeapplication/x-httpd-php-source.phps

Installing Mysql. Doing configuration

Configure PHP

To configure php go to “php.ini”Search for “register_global” check it for if not change

it to off.Search for “error_reporting and display errors”. When

we are writing your code enable it by doing “E_ALL”. After production disable it by doing “E_NONE”

Change the session data to store in a particular folder to do so. “session.save_path=c:/windows/temp”

The default execution time is 3o seconds. It is not possible for some scripts to complete execution within 30 secs .you can change to 10 to 15 minutes. Put the value like this “max_executin time = 900”

Save your “php.ini”

& restart ur apache

to get the effect.

Basic architecture

Browser Data baseMiddle Ware(PHP,JSP.

ASP)

Web server(Apache/IIS

)

Variables

All variables start with ‘$’.Variable starts with alpha numeric.Stay away from using underscore from at

start of variable.Variable can contain alpha numeric.

$name$var1$var_Name$varName

Good practice of writing variable

Good practice of writing variable

Working with numbers

You can do all

mathematical operation

like this?

Strings

String is a collection of characters treated as single entity.

In PHP we put a string using: Within two double quotes = “” Within two single quotes = ‘’

$myString = “Welcome to Open Source”;

$myString = ‘Welcome to Open Source’;

Bypassing the special characters

Some times we need to work with special characters which is used by the php.

Even some special characters are there for Mysql.

Some times we want to by pass the characters.We have to by pass the double quote in between

double quote.We have to by pass the Single quote in between

single quote.To do that we need to use (\) back slash before

the characters.

Cont’d …..

$str =“my Name is “Papu” ”;

$str =“my Name is \“Papu\” ”;

$str =‘my Name is ‘Papu’ ‘;

$str =‘my Name is \’Papu\’ ‘;

$str =‘my Name is “Papu” ‘;

$str =‘my Name is ”Papu” ‘;

No need of (\)

Stick w

ith one

style

Cont’d …..

Remember if you put a variable in between double quote it will replace by it’s value. In between single it the variable will be displayed.

String concatenation

We can join two strings using a (.) operator.

String comparison

We can compare two strings using <,>,<=,>=,==