Collaborative Bangla book authoring project on PHP

Hello Mates,
On behalf of PHPExpertGroup Hasin Hayder already start a project named “Collaborative book authoring project on PHP” where everyone of you (those who are interested) will write a Bangla book on PHP together on a collaborative manner. You can contribute on whatever way you want, suggestions, part of chapters, corrections, proofs, screen shots [...]

Today is Holy ‘Sobe Miraj’

‘Sobe Miraj’ is a holy day for all Muslims. In 620 AD our prophet Hazrat Mohammad (Sm.) visit upper sky to meet Almighty Allah. So, all muslims pray to Allah tonight. This night is full of ‘Rahamat’. Our prophet brought ‘Five times Namaz every day’ for us.

The Unified Modeling Language (UML)- part 9

Timing Diagrams
UML timing diagrams are used to display the change in state or value of one or more elements over time. It can also show the interaction between timed events and the time and duration constraints that govern them.

State Lifeline
A state lifeline shows the change of state of an item over time. [...]

The Unified Modeling Language (UML)- part 8

Communication Diagrams
A communication diagram, formerly called a collaboration diagram, is an interaction diagram that shows similar information to sequence diagrams but its primary focus is on object relationships.
On communication diagrams, objects are shown with association connectors between them. Messages are added to the associations and show as short arrows pointing in the direction of the [...]

The Unified Modeling Language (UML)- part 7

State Machine Diagrams
A state machine diagram models the behaviour of a single object, specifying the sequence of events that an object goes through during its lifetime in response to events.
As an example, the following state machine diagram shows the states that a door goes through during its lifetime.

The door can be in one of three [...]

The Unified Modeling Language (UML)- part 6

Activity Diagrams
In UML, an activity diagram is used to display the sequence of activities. Activity diagrams show the workflow from a start point to the finish point detailing the many decision paths that exist in the progression of events contained in the activity. They may be used to detail situations where parallel processing may occur [...]

The Unified Modeling Language (UML)- part 5

Use Case Diagram
Use Case Model
The use case model captures the requirements of a system. Use cases are a means of communicating with users and other stakeholders what the system is intended to do.
Actors
A use case diagram shows the interaction between the system and entities external to the system. These external entities are referred to as [...]

The Unified Modeling Language (UML)- part 4

Component Diagrams
Component diagrams illustrate the pieces of software, embedded controllers, etc., that will make up a system. A component diagram has a higher level of abstraction than a Class Diagram – usually a component is implemented by one or more classes (or objects) at runtime. They are building blocks so a component can eventually encompass [...]

The Unified Modeling Language (UML)- part 3

Object Diagrams
An object diagram may be considered a special case of a class diagram. Object diagrams use a subset of the elements of a class diagram in order to emphasize the relationship between instances of classes at some point in time. They are useful in understanding class diagrams. They don’t show anything architecturally different to [...]

The Unified Modeling Language (UML)- part 2

Class Diagrams
The class diagram shows the building blocks of any object-orientated system. Class diagrams depict a static view of the model, or part of the model, describing what attributes and behavior it has rather than detailing the methods for achieving operations. Class diagrams are most useful in illustrating relationships between classes and interfaces. Generalizations, aggregations, [...]