Learn PHP in 24 Hours

SAMS Teach Yourself PHP in 24 Hours, 3rd Edition courtesy of the Association for Computing Machinery

This post was created as a reference point.

PHP Standard Data Types

There are 6 standard data types in PHP. They are:

  • Integer
  • Double
  • String
  • Boolean
  • Object
  • Array
  • There are also 2 Special Data Types. They are:

  • Resource
  • Null
  • Testing for a specific data type.

    Functions to test data types

  • is_array()
  • is_bool()
  • is_double()
  • is_int()
  • is_object()
  • is_string()
  • is_null()
  • is_resource()
  • Operators and Expressions

    An operator is a symbol or series of symbols that, when used in conjunction with values, performs an action and usually produces a new value.

    An ...

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    Understanding Unified Modeling Language (UML)

    Understanding Unified Modeling Language (UML)

    Overview

    UML is the de-facto standard for modeling Object Oriented software.

    UML allows software engineers to document models in a way that supports scalability. UML modeling raises the level of abstraction throughout the analysis and design process. UML modeling facilitates the creation of modular designs resulting in components and component libraries that expedite development.

    The UML architecture is based on the Meta-Object Facility (MOF). The MOF defines the foundation for creating modeling languages used for object modeling (UML), and ...

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