Function PHP [Part 1]

Function or functions in PHP is a series of scripts that have utility (function) of a special program that has been initialized.

Functions can be divided into:

 Built-in

 User-defined function

 External

Built-in function

Is a function that has been provided by the PHP that can necessarily be (directly) used / execution.

Various buil-in functions:

• Functions for arrays,
•  mathematical function,
• Function string / text processing
• Function date
• The function checks the data type, the database functions
• Function and xml web, networking functions, etc.

To function date (date), and xml string will be described in a separate section.

An example of a buil-in function is a mathematical function in the search for value, eg searching for the root value of the quadrat, the quadrat values​​, trigonometric, etc

Exaple

Output

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