Introduction to PHP - SDPHP

INTRODUCTION TO PHP

SDPHPTwitter: @sdphp | www.sdphp.org (coming soon)

MeetUp: www.meetup.com/SanDiegoPHP/

Who we are:Presenters

John Congdon - Senior Web Developer at Networx Online

Twitter: @johncongdon

Email: [email protected]

LinkedIn: http://www.linkedin.com/in/johncongdon

Eric Van Johnson - Systems Architect at AMCO International Education Services, Inc.

Twitter: @shocm

Email: [email protected]

LinkedIn: http://www.linkedin.com/in/vanjohnson

San Diego PHP User Group

San Diego PHP Meetups => http://www.meetup.com/SanDiegoPHP/

Facebook => https://www.facebook.com/groups/SanDiegoPUG/

IRC => freenode.net #sdphp

Twitter => @sdphp

A quick history

Created in 1994 by Rasmus Lerdorf and was a set of simple Common Gateway Interface (CGI) binaries written in the C programming language that he used for tracking visits to his online resume, he named the suite of scripts "Personal Home Page Tools"

In 1998 PHP 3.0 is announced and is a complete rewrite of the platform. By this time Andi Gutmans and Zeev Suraski of Tel Aviv, Israel join Rasmus to collaborate on the new implementation. This is also when PHP got it's official name PHP: Hypertext Preprocessor, which is a recursive acronym.

A quick history (cont.)

PHP 4 is released in 2000 sporting a new engine dubbed 'Zend Engine' (comprised of the first names of Zeev and Andi). PHP 4.0 introduces a wide range of additional new features. In addition to the highly improved performance it also included key features such as support for many more web servers, HTTP sessions, output buffering, more secure ways of handling user input and several new language constructs.

There are companies that still use PHP 4.x in their production environment. (And we like to make fun of them)

PHP 5 released in 2004 powered by Zend Engine II with a new object mode. Current stable version of PHP is 5.4.8. Several new features come packed in the current releases of PHP such as Namespace support, Native JSON support, and security improvements.

Who uses PHP?

EVERYONE!

Google / Yahoo / Facebook / Sony / Bank of America / NYSE / AT&T /

Blah Blah Blah Blah

OPEN & CLOSING TAGS

VARIABLES

A Variable, as the name suggests, can have its value change during the execution of a script.

CONSTANTS

A constant, once defined, cannot be changed or unset. Traditionally constants are uppercase.

INCLUDE FILE.. ONCE

Useful for class and function loading

INCLUDING MISSING SCRIPTS

TYPES IN PHP

• Strings

• Integers

• Floats

• Arrays

• and many more...

STRINGS

What's the difference?

INTEGERS

ARRAYS

Arrays are zero-based.

Arrays can be of mixed types

ASSOCIATIVE ARRAYS

Key => Value pairs of data

FLOW CONTROL

FOR LOOPS

FOREACH LOOPS

FOREACH LOOPS

WHILE LOOPS

DO WHILE

SWITCH CASES

CONTINUE AND BREAK

• for• foreach• while• do ... while• switch

ALTERNATE SYNTAXES

ALTERNATE SYNTAX: IF

ALTERNATE SYNTAX: FOR

ALTERNATE SYNTAX: FOREACH

ALTERNATE SYNTAX: WHILE

FUNCTIONS

CLASSES

MAGIC: GET

MAGIC: GET

MAGIC: SET

STATIC

CLASS CONSTANTS

CLASS VISIBILITY

METHOD OVERLOADING

DATABASE ACCESS

Why you should be using PDO (PHP Data Objects)

• Cross Database Driver support

• Prepared Statements

• Proper bindings

• and lots lots more

MODELS, VIEWS, CONTROLLERS

• Code Separation

• Reusability

• Ease Refactoring

MODELS

• a model represents your data

• Logical container foro Database callso API Access

• Models usually represento Tables in a databaseo a file or collection of files on a hard driveo Documents stored in Mongoo Any other data containers you need to define

VIEWS

VIEW.. MODELS?

CONTROLLERS

Other cool things PHP can do that not a lot of people know.

• PHP CLI - PHP files don't have to be web pages. PHP is a very powerful language that can be used from the command line to perform a wide range of system task.

• As of PHP 5.4.0, the CLI SAPI provides a built-in web server. $ cd ~/public_html

$ php -S localhost:8000

More other cool things

• As of PHP 5.1.0, the CLI SAPI provides an interactive shell using the -a option.

PHP Tools

• Text Editor (Notepad / Notepad ++)

• Vim

IDEs

• Eclipse (Open Source)o PDT Plugin (Open Source)o Aptana PHP (Open Source)

Aptana Studio Pro (Commercial)o Zend Studio (Commercial)

• NetBeans (Open Source)

• PhpStorm (Commercial)

• NuSphere PhpED (Commercial)

What do employers look for?

• A college degree, so you are on the right track

• Code examples. Will typically check for a Github account. Make sure you have some publicly contributed code. Open Source Projects are good place to do this.

• Certificationso Zend PHP Certifications http://www.zend.com/services/certification/o MySQL Developer http://education.oracle.com/pls/web_prod-plq-

dad/db_pages.getpage?page_id=458&get_params=p_track_id:MDEV

What else do employers look for?

PASSIONDevelopment is a very personal thing.

A developer needs to be creative, logical, focused, and enjoy what they are doing. Get involved with the PHP community. Forums, StackOverflow, Local User Groups like SDPHP ;-)

Resources

Local

San Diego PHP Meetups => http://www.meetup.com/SanDiegoPHP/

Facebook => https://www.facebook.com/groups/SanDiegoPUG/

IRC => freenode.net #sdphp

Twitter => @sdphp / @shocm / @johncongdon / @williammanley

Others

Zend.com

StackOverflow => http://stackoverflow.com/questions/tagged/php

php|Arch => http://www.phparch.com/

CreditsOriginal Presentation by

William Cahill-Manley - Application Developer for Submodal

Twitter: @williammanley

Email: [email protected]

Today's Presenters

John Congdon - Senior Web Developer at Networx Online

Twitter: @johncongdon

Email: [email protected]

LinkedIn: http://www.linkedin.com/in/johncongdon

Eric Van Johnson - Systems Architect at AMCO International Education Services, Inc.

Twitter: @shocm

Email: [email protected]

LinkedIn: http://www.linkedin.com/in/vanjohnson