Introduction to PHP 5

apatheticyogurtSoftware and s/w Development

Dec 13, 2013 (3 years and 5 days ago)

77 views

1

Introduction to PHP 5

Introduction to PHP 5

Presented by Brett Buddin

2

Introduction to PHP 5

What is PHP?

“PHP: Hypertext Preprocessor”


General purpose scripting language


Most commonly used for server
-
side
scripting

3

Introduction to PHP 5

4

Introduction to PHP 5

Why use PHP?


Simple syntax


Easy to learn


Great performance


Fantastic online documentation


Open Source

5

Introduction to PHP 5

History


Initially released in June 1995 by Rasmus
Lerdorf as “Personal Home Page Tools”


Lerdorf merged PHP with his Form Interpreter
to create PHP/FI


Zeev Suraski

and
Andi Gutmans

rewrote
the parser to form the core of PHP 3

6

Introduction to PHP 5

History


PHP 4 released in May 2000


PHP 5 released in July 2004


Today powers millions of applications

7

Introduction to PHP 5

Growth of PHP

Source: Netcraft

8

Introduction to PHP 5

New in PHP 5


Completely rewritten object model


Interoperable XML tools


MySQLi extension


SQLite embedded


Exception handling

9

Introduction to PHP 5

Objects in PHP 3 and 4


Treated as primitive data types


Assigned and passed by value


Had to manually force pass by
reference

10

Introduction to PHP 5

Objects in PHP 5


Woven into the core


Assigned and passed by handle


This eliminates
a lot

of ampersands

11

Introduction to PHP 5

Rewritten object model


Interfaces and Abstract classes


Class type hints


Static keyword


Final keyword

12

Introduction to PHP 5

Rewritten object model


Cloning


Constructors and destructors


Access modifiers

13

Introduction to PHP 5

Cloning


__clone()

method


Offers a way to create a copy of an
object

14

Introduction to PHP 5

Constructors and Destructors


__construct()

and
__destruct()

methods

added


Old constructor syntax still works

15

Introduction to PHP 5

Access modifiers


Access modifiers added for properties and
methods


The three P’s:


Public:

All scopes have access


Private:

Only local object has access


Protected:

Only local and derived objects have
access

16

Introduction to PHP 5

Interoperable XML tools


Standardized on
libxml2


Extensions work together as a whole


W3C specification compliant


Very efficient

17

Introduction to PHP 5

MySQLi Extension


Prepared statements


Bound input and output parameters


SSL connections


Multi
-
query functions

18

Introduction to PHP 5

SQLite embedded


No need for flat file databases


SQLite supports


Transactions


Subqueries


Triggers

19

Introduction to PHP 5

Exception handling


Eliminates the need to check return
values for every function


Separation of business logic and error
logic

20

Introduction to PHP 5

PHP’s drawbacks


Lack of language design


Inconsistent naming conventions and
function behavior


Almost too popular

21

Introduction to PHP 5

Questions?