it club @ ncp - php workshop may 10, 2011

PHP & MYSQL WORKSHOP

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AGENDA Goal

Introduction

Market Demand for PHP

PHP Language Basics

MySQL Basics Using phpMyAdmin

PHP Frameworks & Advantages

Exercise: Simple Content Management System (CMS)

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GOAL

Not to teach advanced PHP, nor the history, just the basics to get you started

Explain code with example/practical

Not to explain what database is or SQL queries

Provide some references3

INTRODUCTION

What is PHP?PHP stands for Hypertext Preprocessor

Widely used server-side scripting language suited especially for web development

Embedded into other languages [HTML, Python]

PHP combines elements of Perl, C and Java

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WHAT IS PHP? (CONTD..)

Source code invisible to users via ‘view source’ option from browser

Huge library of built-in functions for faster development

Compatible with all major databases

PHP is FREE5

MARKET DEMAND FOR PHP High demand and still growing

Companies get customized applications and dynamic websites

Trend is shifting towards more contractors than full time employees

Big websites using PHP : Facebook, Yahoo, Wikipedia

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MARKET DEMAND FOR PHP (CONTD..)Reason for demand :Huge development and support community behind it

Highly maintained even though its free

Easy to learn 7

PHP BASICS Installation Separate PHP interpreter has good support in LinuxMost application requires database engineWAMP (windows, apache, mysql and php) serverLAMP (Linux, apache, mysql and php) serverXAMPP for Mac OS X, windows

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PHP BASICS (CONTD..)Entire PHP code is contained inside

the php script tag<?php // some code here?><script language=“PHP”> … </script>PHP can be embedded into HTML code

any number of times in one page itself using php script tag

<?php statements; ?><html><?php statements; ?>

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PHP file always have extension ‘.php’ index.php database_connection.php

PHP variables must start with a ‘$’ sign $name = ‘John Doe’; $age = 30;

PHP variables are case sensitive $Name != $name != $nAme

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PHP BASICS (CONTD..)

Hello World Example <?php echo “Hello World!”; echo “</br>”;

echo 45; ?>

<script language=“PHP”> $city = ‘Mississauga’; echo $city; </script>

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Arithmetic Operations example <?php $x = 5; $y = 3; $a = $x + $y; //addition $s = $x - $y; //subtraction $m = $x * $y; //multiply $d = $x / $y; //division $c = $x.$y; //concatenation echo $a, $s, $m, $d, $c; ?>

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Escaping character If a string has quotation marks which is supposed to be visible then use ‘ before quotation marks to display them <?php $title = ‘ ”NCP-IT Club” ‘; echo $title; ?>

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Control structures controls the flow of execution of a program (Ex. If/else, while, for)

Example : if / else statements if ($day == “Tuesday”) { //code here

} else

{ //code here }

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PHP CONTROL STRUCTURE

While loop

<?php $count = 0; while($count<5)

{echo “Hello”;

$count +=1;//$count++;

} ?>

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PHP CONTROL STRUCTURE

include() include_once() require() require_once()

These files will insert or connect different files to the current file

Example: <?php include(“database.php”); ?>

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PHP INCLUDE FILES

PHP FORM DATA Simplicity of global variables like POST and GET in php

<?php

if ($_POST["submit"])

echo "<h2>You clicked Submit!</h2>";

else if ($_POST["cancel"]) echo "<h2>You clicked Cancel!</h2>"; ?>

<form action="form.php" method="post"> <input type="submit" name="submit"

value="Submit"> <input type="submit" name="cancel"

value="Cancel"></form>

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MYSQL - PHP MySQL is open source database

Used commercially as well

PHP works best with MySQL

Vast library of functions for PHP-MySQL

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phpMyAdmin is free php tool to administer MySQL

Features : Intuitive web interface Manage databases, tables, views Manage MySQL users, privileges Manage MySQL triggers and

procedures Import and export data

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MYSQL USING PHPMYADMIN

PHP FRAMEWORKS AND ADVANTAGES Symfony

CakePHP

Zend

Joomla

Drupal

WordPress

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Built in functions and classes

Advanced security

Great support

Free to use

Easier to upgrade21

PHP FRAMEWORKS AND ADVANTAGES (CONTD..)

BASIC CONTENT MANAGEMENT SYSTEM (CMS)

To Do Create database Connect to database Display a form with 2-3 fields Save the form data into database

Display the saved data from database

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TIPS AND TRICKS Do not use windows or unix

specific functions for portability

Make use of functions for repetitive code

Typos in variables will cause problem 23

REFERENCES PHP Downloads and Online

Documentationwww.php.netwww.phpmyadmin.netwww.mysql.com

Communitywww.phpbuilder.com: articles on

PHP, discussion forumswww.phpresourceindex.com

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Please Shut-Down the systems before you leave

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REMINDER

it club @ ncp - php workshop may 10, 2011

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