PHP Programming

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PHP Programming Training Materials

IMPORTANT NOTE for trainers only: 
Please DO NOT change these materials, especially the EXERCISES, without direct permission from: LUKASZ SOKOLOWSKI.

Intro

PHP

  • general-purpose scripting language
  • especially suited to web development
  • fast, flexible and pragmatic
  • powers everything from simple blog to the corporate organisations

Intro con't

PHP - recursive acronym for PHP: Hypertext Preprocessor

  • widely-used open source language
  • can be embedded into HTML
  • code is executed on the server, generating HTML which is then sent to the client
  • extremely simple, yet offers many advanced features

PHP can

  • collect form data
  • generate dynamic page content
  • send and receive cookies
  • so in general - server-side scripting
    • whats needed? - the PHP parser (CGI or server module), a web server, and a web browser
  • be used on all major operating systems
  • support most of the web servers (Apache, IIS, lighttpd, nginx, etc)
  • support talking to other services - LDAP, IMAP, SNMP, NNTP, POP3, HTTP, COM (on Windows)
  • work as either a module, or as a CGI processor
  • do procedural programming or object-oriented programming (OOP), or a mixture of them both

PHP can con't

  • also do command line scripting
    • run without any server or browser - only the PHP parser is needed
    • ideal for scripts regularly executed using cron (on Unix or macOS) or Task Scheduler (on Windows)
  • so ie. do simple/stronger text processing tasks - Perl regexps (PCRE), etc
  • output HTML, images, PDF, encrypted data, emails, JSON, XML (libxml2, SimpleXML, XMLReader, XMLWriter; XDebug)
    • auto generate these files, and save them in the file system, instead of printing it out, forming a server-side cache for dynamic content
  • support a wide range of databases
    • via db specific ext, or abstraction layers (like PDO), or ODBC, cURL, sockets (CouchDB)
  • support the WDDX complex data exchange
  • instantiate Java objects and use them transparently as own objects

Data Structures (refresher only)

Examples and exercises

  • localhost/phpWay

PHP XML

Examples and exercises

  • localhost/ws_

Using Databases

  • Methods of data storing
  • PDO extension
  • Connecting to a database using PDO
  • Operations on data
  • Error Handling PDO
  • Transactions
  • Primary keys
  • Joins
  • Aggregate functions and grouping
  • connect to the database
  • storing passwords
  • executing queries
  • processing data
  • modifying and removing data
  • binding form to records in the database
  • Helpers

Examples and exercises

  • localhost/phpWay
  • localhost/ws_
  • localhost/wordpress

Programming interfaces

  • Architecture services
  • Adding to the system API
  • The data format JSON and XML
  • RESTful Services
  • Designing Web Service

Examples and exercises

Object-Oriented Programming

  • Terminology Object
  • Declaring classes and constructors
  • Creating and Using Objects
  • Properties and methods
  • Inheritance
  • Access modifiers
  • Magic methods
  • Declaring and using interfaces
  • exception Handling
  • Helpers

Examples and exercises

  • localhost/ws_
  • localhost/wordpress

Dealing with Images

Examples and Exercises

  • localhost/mw - enable GD and check how mw uses Image thumbnailing

Design Patterns, PSRs

Examples and exercises

  • localhost/ws_
  • localhost/wordpress

Efficiency

Examples and exercises

  • localhost/wm - install wm and enable APCu

Safety

  • Filtering input
  • Session fixation
  • Session hijacking
  • SQL injection
  • Storing passwords
  • SSL

Security

Stacks and Frameworks - lamp, wamp, etc

wp

wp con't

wp API refs

mw